/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/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:42:36,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:42:36,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:42:36,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:42:36,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:42:36,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:42:36,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:42:36,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:42:36,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:42:36,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:42:36,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:42:36,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:42:36,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:42:36,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:42:36,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:42:36,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:42:36,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:42:36,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:42:36,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:42:36,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:42:36,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:42:36,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:42:36,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:42:36,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:42:36,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 16:42:36,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 16:42:36,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 16:42:36,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 16:42:36,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 16:42:36,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 16:42:36,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:42:36,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:42:36,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:42:36,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:42:36,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:42:36,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:42:36,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:42:36,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:42:36,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:42:36,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:42:36,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:42:36,995 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 [2020-10-15 16:42:37,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:42:37,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:42:37,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:42:37,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:42:37,037 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:42:37,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:42:37,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:42:37,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:42:37,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:42:37,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:42:37,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:42:37,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:42:37,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:42:37,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:42:37,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:42:37,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:42:37,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:42:37,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:42:37,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:42:37,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:42:37,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:42:37,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:42:37,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:42:37,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:42:37,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:42:37,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:42:37,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:42:37,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:42:37,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:42:37,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:42:37,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:42:37,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:42:37,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:42:37,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:42:37,361 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:42:37,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-15 16:42:37,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4567925ea/25e033c407a640a594d1f4cfd73e876c/FLAG41e797cd1 [2020-10-15 16:42:37,939 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:42:37,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-15 16:42:37,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4567925ea/25e033c407a640a594d1f4cfd73e876c/FLAG41e797cd1 [2020-10-15 16:42:38,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4567925ea/25e033c407a640a594d1f4cfd73e876c [2020-10-15 16:42:38,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:42:38,254 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:42:38,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:38,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:42:38,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:42:38,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f31713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38, skipping insertion in model container [2020-10-15 16:42:38,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:42:38,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:42:38,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:38,806 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:42:38,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:38,915 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:42:38,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38 WrapperNode [2020-10-15 16:42:38,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:38,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:38,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:42:38,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:42:38,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:38,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:42:38,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:42:38,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:42:38,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (1/1) ... [2020-10-15 16:42:38,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:42:38,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:42:38,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:42:38,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:42:38,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (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 [2020-10-15 16:42:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:42:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:42:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:42:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:42:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:42:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:42:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:42:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:42:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:42:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:42:39,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:42:39,054 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:42:39,379 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:42:39,379 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:42:39,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:39 BoogieIcfgContainer [2020-10-15 16:42:39,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:42:39,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:42:39,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:42:39,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:42:39,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:42:38" (1/3) ... [2020-10-15 16:42:39,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f935bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:39, skipping insertion in model container [2020-10-15 16:42:39,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:38" (2/3) ... [2020-10-15 16:42:39,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f935bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:39, skipping insertion in model container [2020-10-15 16:42:39,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:39" (3/3) ... [2020-10-15 16:42:39,390 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-15 16:42:39,401 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:42:39,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:42:39,408 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:42:39,409 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:42:39,452 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,452 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,453 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,454 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,454 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,454 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,455 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,455 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,455 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,456 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,457 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,458 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,458 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,459 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,460 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,464 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,465 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,465 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,465 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,472 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,472 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,472 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,472 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:39,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:42:39,503 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:42:39,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:42:39,504 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:42:39,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:42:39,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:42:39,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:42:39,504 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:42:39,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:42:39,516 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:42:39,518 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:39,520 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:39,521 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:39,557 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 16:42:39,557 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:42:39,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 16:42:39,566 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 16:42:40,756 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 16:42:40,757 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 16:42:40,764 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 16:42:40,775 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:42:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:42:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:42:40,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:40,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:42:40,786 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 16:42:40,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:40,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836311125] [2020-10-15 16:42:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836311125] [2020-10-15 16:42:41,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:41,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:42:41,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394123721] [2020-10-15 16:42:41,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:42:41,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:42:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:42:41,035 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:42:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,103 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 16:42:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:42:41,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:42:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,117 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:41,117 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 16:42:41,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 16:42:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 16:42:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 16:42:41,158 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 16:42:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,159 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 16:42:41,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:42:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 16:42:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:42:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:42:41,161 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 16:42:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858175244] [2020-10-15 16:42:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858175244] [2020-10-15 16:42:41,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:41,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:42:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401641648] [2020-10-15 16:42:41,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:42:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:42:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:41,287 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 16:42:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,315 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 16:42:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 16:42:41,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:42:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,317 INFO L225 Difference]: With dead ends: 56 [2020-10-15 16:42:41,317 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:41,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 16:42:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 16:42:41,325 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 16:42:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,327 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 16:42:41,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:42:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 16:42:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:41,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:42:41,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 16:42:41,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715447250] [2020-10-15 16:42:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715447250] [2020-10-15 16:42:41,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:41,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557875662] [2020-10-15 16:42:41,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:41,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:41,404 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 16:42:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,474 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 16:42:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:41,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,476 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:41,476 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:41,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 16:42:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:41,487 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 16:42:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,487 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:41,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:41,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:42:41,489 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 16:42:41,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880971653] [2020-10-15 16:42:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880971653] [2020-10-15 16:42:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:41,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039990986] [2020-10-15 16:42:41,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:41,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:41,563 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 16:42:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,630 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:41,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,632 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:41,633 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:41,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 16:42:41,639 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 16:42:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,639 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 16:42:41,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 16:42:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:41,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:42:41,641 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 16:42:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845991053] [2020-10-15 16:42:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845991053] [2020-10-15 16:42:41,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:41,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:41,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733843519] [2020-10-15 16:42:41,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:41,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:41,709 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 16:42:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,795 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 16:42:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:41,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,797 INFO L225 Difference]: With dead ends: 57 [2020-10-15 16:42:41,797 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 16:42:41,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 16:42:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 16:42:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:41,803 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 16:42:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,803 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:41,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:41,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,805 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 16:42:41,805 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 16:42:41,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141797249] [2020-10-15 16:42:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141797249] [2020-10-15 16:42:41,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983594092] [2020-10-15 16:42:41,865 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 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 [2020-10-15 16:42:41,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:41,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:41,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:41,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923327094] [2020-10-15 16:42:41,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:41,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:41,984 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 16:42:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:42,091 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 16:42:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:42,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:42,093 INFO L225 Difference]: With dead ends: 48 [2020-10-15 16:42:42,093 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:42,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 16:42:42,102 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 16:42:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:42,104 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 16:42:42,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 16:42:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:42,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:42,105 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 16:42:42,306 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 16:42:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259354051] [2020-10-15 16:42:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259354051] [2020-10-15 16:42:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871178004] [2020-10-15 16:42:42,388 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 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 [2020-10-15 16:42:42,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386067509] [2020-10-15 16:42:42,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:42,464 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 16:42:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:42,540 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:42,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:42,541 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:42,541 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 16:42:42,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 16:42:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 16:42:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 16:42:42,552 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 16:42:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:42,553 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 16:42:42,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 16:42:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:42,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:42,554 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:42,767 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 16:42:42,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353089226] [2020-10-15 16:42:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353089226] [2020-10-15 16:42:42,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391095208] [2020-10-15 16:42:42,858 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 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 [2020-10-15 16:42:42,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:42,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:42,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573074900] [2020-10-15 16:42:42,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:42,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:42,978 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 16:42:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,098 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 16:42:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:42:43,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,099 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:43,099 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 16:42:43,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 16:42:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 16:42:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:43,109 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 16:42:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,109 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:43,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:43,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,110 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:43,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,324 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 16:42:43,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:43,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414631372] [2020-10-15 16:42:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414631372] [2020-10-15 16:42:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005868555] [2020-10-15 16:42:43,375 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 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 [2020-10-15 16:42:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:43,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:43,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:43,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294528104] [2020-10-15 16:42:43,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:43,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:43,474 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 16:42:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,634 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:43,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,636 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:43,636 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:43,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:43,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 16:42:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 16:42:43,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 16:42:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,643 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 16:42:43,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 16:42:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:43,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,644 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:43,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,857 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 16:42:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:43,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035979676] [2020-10-15 16:42:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035979676] [2020-10-15 16:42:43,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759157004] [2020-10-15 16:42:43,911 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 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 [2020-10-15 16:42:43,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:43,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177764192] [2020-10-15 16:42:44,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:44,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:44,012 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 16:42:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:44,159 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 16:42:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:44,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:44,160 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:44,160 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:44,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 16:42:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 16:42:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 16:42:44,164 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 16:42:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:44,165 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 16:42:44,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 16:42:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:44,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:44,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 16:42:44,377 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 16:42:44,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135944660] [2020-10-15 16:42:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135944660] [2020-10-15 16:42:44,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284330346] [2020-10-15 16:42:44,436 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 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 [2020-10-15 16:42:44,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:42:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:44,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787917173] [2020-10-15 16:42:44,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:44,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:44,511 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 16:42:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:44,600 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 16:42:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:44,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:44,602 INFO L225 Difference]: With dead ends: 64 [2020-10-15 16:42:44,602 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 16:42:44,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 16:42:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 16:42:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 16:42:44,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 16:42:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:44,607 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 16:42:44,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 16:42:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:44,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:44,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,817 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 16:42:44,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902387135] [2020-10-15 16:42:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902387135] [2020-10-15 16:42:44,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33671558] [2020-10-15 16:42:44,876 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 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 [2020-10-15 16:42:44,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:44,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852374651] [2020-10-15 16:42:44,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:44,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:44,966 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 16:42:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,127 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 16:42:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:45,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,129 INFO L225 Difference]: With dead ends: 61 [2020-10-15 16:42:45,129 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:45,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 16:42:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:45,133 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 16:42:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,134 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:45,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:45,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:45,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:45,344 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 16:42:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:45,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640521476] [2020-10-15 16:42:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640521476] [2020-10-15 16:42:45,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697125546] [2020-10-15 16:42:45,395 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 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 [2020-10-15 16:42:45,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:45,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:45,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:45,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733360120] [2020-10-15 16:42:45,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:45,482 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 16:42:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,606 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:45,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,608 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:45,608 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:45,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 16:42:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 16:42:45,613 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 16:42:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,613 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 16:42:45,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 16:42:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:45,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:45,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:42:45,826 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 16:42:45,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:45,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447590282] [2020-10-15 16:42:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447590282] [2020-10-15 16:42:45,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039917763] [2020-10-15 16:42:45,879 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 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 [2020-10-15 16:42:45,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:45,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:45,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:45,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:45,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:45,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:45,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955381233] [2020-10-15 16:42:45,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:45,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:45,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:45,957 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 16:42:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:46,183 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 16:42:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:46,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:46,184 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:46,184 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:46,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 16:42:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 16:42:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 16:42:46,188 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 16:42:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:46,189 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 16:42:46,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 16:42:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:46,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:46,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:46,399 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 16:42:46,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123286252] [2020-10-15 16:42:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123286252] [2020-10-15 16:42:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002602194] [2020-10-15 16:42:46,473 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 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 [2020-10-15 16:42:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:46,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:46,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:46,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298037207] [2020-10-15 16:42:46,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:46,554 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 16:42:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:46,722 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 16:42:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:46,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:46,723 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:46,723 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:46,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 16:42:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:46,727 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 16:42:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:46,727 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:46,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:46,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:46,728 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:42:46,937 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 16:42:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770602905] [2020-10-15 16:42:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770602905] [2020-10-15 16:42:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11513649] [2020-10-15 16:42:47,013 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 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 [2020-10-15 16:42:47,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:47,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025727846] [2020-10-15 16:42:47,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:47,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:47,099 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 16:42:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,290 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 16:42:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:47,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,291 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:47,292 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 16:42:47,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 16:42:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 16:42:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 16:42:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 16:42:47,295 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 16:42:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,295 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 16:42:47,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 16:42:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:47,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:42:47,505 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 16:42:47,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002732517] [2020-10-15 16:42:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002732517] [2020-10-15 16:42:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515207503] [2020-10-15 16:42:47,571 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 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 [2020-10-15 16:42:47,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186796505] [2020-10-15 16:42:47,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:47,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:47,633 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 16:42:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,726 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 16:42:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:47,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,728 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:47,729 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:47,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 16:42:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 16:42:47,732 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 16:42:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,732 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 16:42:47,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 16:42:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:47,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:42:47,942 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 16:42:47,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070615683] [2020-10-15 16:42:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070615683] [2020-10-15 16:42:48,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540430766] [2020-10-15 16:42:48,015 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 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 [2020-10-15 16:42:48,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:48,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:48,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:48,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:48,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879139039] [2020-10-15 16:42:48,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:48,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:48,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:48,099 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 16:42:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,227 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 16:42:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:48,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,228 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:48,228 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:48,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 16:42:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:48,233 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 16:42:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,233 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:48,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:48,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:48,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:42:48,437 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 16:42:48,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:48,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102106743] [2020-10-15 16:42:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102106743] [2020-10-15 16:42:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042272117] [2020-10-15 16:42:48,495 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 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 [2020-10-15 16:42:48,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:48,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:48,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:48,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957757560] [2020-10-15 16:42:48,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:48,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:48,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:48,573 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 16:42:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,722 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 16:42:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:48,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,723 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:48,723 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:48,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 16:42:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 16:42:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 16:42:48,728 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 16:42:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 16:42:48,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 16:42:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:48,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,730 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:48,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:48,938 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:48,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 16:42:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:48,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560670280] [2020-10-15 16:42:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560670280] [2020-10-15 16:42:49,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105776173] [2020-10-15 16:42:49,005 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 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 [2020-10-15 16:42:49,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:49,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:49,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:49,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705531661] [2020-10-15 16:42:49,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:49,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:49,101 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 16:42:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:49,308 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 16:42:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:49,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:49,309 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:49,309 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:49,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 16:42:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:49,312 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 16:42:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:49,313 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:49,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:49,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:49,314 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:49,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:49,514 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:49,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 16:42:49,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:49,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588122927] [2020-10-15 16:42:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588122927] [2020-10-15 16:42:49,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519197424] [2020-10-15 16:42:49,569 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 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 [2020-10-15 16:42:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:49,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:49,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765301912] [2020-10-15 16:42:49,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:49,634 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 16:42:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:49,818 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:42:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:49,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:49,821 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:42:49,821 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:42:49,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:42:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 16:42:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 16:42:49,825 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 16:42:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:49,825 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 16:42:49,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 16:42:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:49,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:49,826 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:50,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:50,033 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 16:42:50,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:50,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725246777] [2020-10-15 16:42:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725246777] [2020-10-15 16:42:50,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246871121] [2020-10-15 16:42:50,088 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 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 [2020-10-15 16:42:50,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:50,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:50,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419309313] [2020-10-15 16:42:50,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:50,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:50,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:50,179 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 16:42:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:50,415 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 16:42:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:50,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:50,416 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:50,417 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:50,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 16:42:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:42:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 16:42:50,421 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 16:42:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:50,421 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 16:42:50,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 16:42:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:50,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:50,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:50,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 16:42:50,624 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 16:42:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:50,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728508922] [2020-10-15 16:42:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728508922] [2020-10-15 16:42:50,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614464910] [2020-10-15 16:42:50,699 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 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 [2020-10-15 16:42:50,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:50,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952499411] [2020-10-15 16:42:50,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:50,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:50,776 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 16:42:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:50,909 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 16:42:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:50,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:50,911 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:50,911 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:50,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 16:42:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:50,915 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:50,915 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:50,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:50,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:50,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:51,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:42:51,126 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 16:42:51,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:51,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352789582] [2020-10-15 16:42:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352789582] [2020-10-15 16:42:51,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710749606] [2020-10-15 16:42:51,207 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 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 [2020-10-15 16:42:51,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:51,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:51,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:51,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:51,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:51,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568744552] [2020-10-15 16:42:51,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:51,316 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:51,505 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 16:42:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:51,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:51,507 INFO L225 Difference]: With dead ends: 71 [2020-10-15 16:42:51,507 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 16:42:51,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 16:42:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 16:42:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:51,510 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:51,511 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:51,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:51,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:51,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:51,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 16:42:51,714 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 16:42:51,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:51,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826291057] [2020-10-15 16:42:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826291057] [2020-10-15 16:42:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487435885] [2020-10-15 16:42:51,781 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 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 [2020-10-15 16:42:51,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:51,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:51,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:51,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:51,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599682868] [2020-10-15 16:42:51,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:51,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:51,851 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:52,022 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 16:42:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:52,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:52,023 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:52,024 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 16:42:52,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 16:42:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 16:42:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:52,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:52,027 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:52,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:52,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:52,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:42:52,235 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 16:42:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:52,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002196101] [2020-10-15 16:42:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002196101] [2020-10-15 16:42:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965085574] [2020-10-15 16:42:52,319 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 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 [2020-10-15 16:42:52,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:52,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:52,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:52,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:52,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147704788] [2020-10-15 16:42:52,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:52,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:52,451 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:52,666 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 16:42:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:52,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:52,667 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:52,667 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:52,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 16:42:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:52,671 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:52,671 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:52,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:52,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:52,672 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:52,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:42:52,881 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 16:42:52,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:52,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760937867] [2020-10-15 16:42:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760937867] [2020-10-15 16:42:52,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711354048] [2020-10-15 16:42:52,943 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 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 [2020-10-15 16:42:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:53,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245885329] [2020-10-15 16:42:53,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:53,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:53,003 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:53,218 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:42:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:53,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:53,220 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:53,220 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:53,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 16:42:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 16:42:53,224 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 16:42:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:53,224 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 16:42:53,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 16:42:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:53,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:53,225 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:53,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,426 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:53,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 16:42:53,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:53,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118862828] [2020-10-15 16:42:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118862828] [2020-10-15 16:42:53,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8520554] [2020-10-15 16:42:53,488 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 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 [2020-10-15 16:42:53,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:53,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685594468] [2020-10-15 16:42:53,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:53,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:53,571 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 16:42:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:53,842 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-15 16:42:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:53,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:53,843 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:53,843 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:53,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-15 16:42:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 16:42:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 16:42:53,846 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 16:42:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:53,846 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 16:42:53,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 16:42:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:53,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:53,847 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:54,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:42:54,058 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 16:42:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:54,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964815143] [2020-10-15 16:42:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964815143] [2020-10-15 16:42:54,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938066681] [2020-10-15 16:42:54,126 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 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 [2020-10-15 16:42:54,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:54,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:54,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:54,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:54,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793340560] [2020-10-15 16:42:54,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:54,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:54,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:54,203 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 16:42:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:54,467 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 16:42:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:54,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:54,468 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:54,469 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:54,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 16:42:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:54,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 16:42:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:54,473 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:54,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:54,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:54,474 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:54,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:42:54,675 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 16:42:54,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:54,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477471214] [2020-10-15 16:42:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477471214] [2020-10-15 16:42:54,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374287415] [2020-10-15 16:42:54,744 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 [2020-10-15 16:42:54,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:54,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:54,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:54,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:54,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:54,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584244730] [2020-10-15 16:42:54,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:54,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:54,826 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 16:42:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:55,123 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 16:42:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:55,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:55,125 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:55,125 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:55,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 16:42:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 16:42:55,129 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 16:42:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:55,129 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 16:42:55,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 16:42:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:55,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:55,130 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:55,336 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 16:42:55,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901770400] [2020-10-15 16:42:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901770400] [2020-10-15 16:42:55,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733531898] [2020-10-15 16:42:55,414 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 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 [2020-10-15 16:42:55,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:55,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:55,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:55,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:55,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138875809] [2020-10-15 16:42:55,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:55,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:55,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:55,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:55,477 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 16:42:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:55,615 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 16:42:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:55,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:55,616 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:55,616 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:55,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 16:42:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 16:42:55,620 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 16:42:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:55,620 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 16:42:55,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 16:42:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:55,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:55,621 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:55,826 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,826 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 16:42:55,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804951368] [2020-10-15 16:42:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804951368] [2020-10-15 16:42:55,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222008143] [2020-10-15 16:42:55,913 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 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 [2020-10-15 16:42:55,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:55,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:55,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:55,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405334125] [2020-10-15 16:42:55,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:55,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:55,994 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 16:42:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:56,207 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 16:42:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:56,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:56,209 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:56,209 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:56,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 16:42:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 16:42:56,214 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 16:42:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:56,215 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 16:42:56,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 16:42:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:56,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:56,216 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:56,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 16:42:56,427 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:56,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 16:42:56,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:56,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369115247] [2020-10-15 16:42:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369115247] [2020-10-15 16:42:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165077685] [2020-10-15 16:42:56,516 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 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 [2020-10-15 16:42:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:56,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:56,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971241864] [2020-10-15 16:42:56,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:56,579 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 16:42:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:56,790 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 16:42:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:56,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:56,791 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:56,792 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:56,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 16:42:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:56,796 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 16:42:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:56,796 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:56,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:56,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:56,797 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:57,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:57,008 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 16:42:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:57,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896903772] [2020-10-15 16:42:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896903772] [2020-10-15 16:42:57,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090604161] [2020-10-15 16:42:57,087 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 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 [2020-10-15 16:42:57,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:57,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:57,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168142611] [2020-10-15 16:42:57,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:57,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:57,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:57,169 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 16:42:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:57,416 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 16:42:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:57,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:57,418 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:57,418 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:57,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 16:42:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:57,421 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 16:42:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:57,421 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:57,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:57,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:57,422 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:57,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:42:57,630 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 16:42:57,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:57,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787527944] [2020-10-15 16:42:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787527944] [2020-10-15 16:42:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158978684] [2020-10-15 16:42:57,701 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 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 [2020-10-15 16:42:57,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:57,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:57,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432515755] [2020-10-15 16:42:57,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:57,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:57,769 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 16:42:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:58,016 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 16:42:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:58,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:58,019 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:58,019 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:58,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 16:42:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:42:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 16:42:58,026 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 16:42:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:58,026 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 16:42:58,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 16:42:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:58,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:58,029 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:58,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:58,239 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 16:42:58,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:58,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832328324] [2020-10-15 16:42:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832328324] [2020-10-15 16:42:58,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029835122] [2020-10-15 16:42:58,310 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 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 [2020-10-15 16:42:58,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:58,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:58,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:58,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860708919] [2020-10-15 16:42:58,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:58,397 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 16:42:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:58,703 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 16:42:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:58,703 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:58,704 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:58,704 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:42:58,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:42:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 16:42:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:58,707 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 16:42:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:58,707 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:58,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:58,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:58,708 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:58,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:42:58,916 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:58,916 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 16:42:58,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:58,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748328170] [2020-10-15 16:42:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748328170] [2020-10-15 16:42:58,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360887763] [2020-10-15 16:42:58,980 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 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 [2020-10-15 16:42:59,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:59,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:59,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:59,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965330529] [2020-10-15 16:42:59,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:59,046 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 16:42:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:59,313 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 16:42:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:59,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:59,314 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:42:59,314 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:42:59,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:42:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 16:42:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 16:42:59,318 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 16:42:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:59,318 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 16:42:59,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 16:42:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:59,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:59,319 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:59,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:42:59,528 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 16:42:59,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:59,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034365668] [2020-10-15 16:42:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034365668] [2020-10-15 16:42:59,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421584565] [2020-10-15 16:42:59,609 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 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 [2020-10-15 16:42:59,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:59,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:59,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:59,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:59,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625162175] [2020-10-15 16:42:59,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:59,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:59,721 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 16:43:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:00,158 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 16:43:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:00,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:43:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:00,160 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:43:00,160 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:43:00,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:43:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:43:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 16:43:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:43:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 16:43:00,164 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 16:43:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:00,165 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 16:43:00,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:43:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 16:43:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:00,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:00,166 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:00,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 16:43:00,376 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 16:43:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:00,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892829983] [2020-10-15 16:43:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892829983] [2020-10-15 16:43:00,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057486174] [2020-10-15 16:43:00,473 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 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 [2020-10-15 16:43:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:00,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:43:00,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536395430] [2020-10-15 16:43:00,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:43:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:00,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:43:00,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:43:00,527 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 16:43:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:00,706 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:43:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:43:00,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:43:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:00,708 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:00,708 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:00,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:43:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 16:43:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:43:00,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:43:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:43:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:43:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:43:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:00,715 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:00,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:43:00,927 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 16:43:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:00,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725562728] [2020-10-15 16:43:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725562728] [2020-10-15 16:43:01,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721791411] [2020-10-15 16:43:01,030 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 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 [2020-10-15 16:43:01,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:01,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:43:01,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71747103] [2020-10-15 16:43:01,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:01,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:01,105 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:43:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,353 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 16:43:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:43:01,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:43:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,354 INFO L225 Difference]: With dead ends: 81 [2020-10-15 16:43:01,355 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:43:01,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:43:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:43:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 16:43:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:43:01,357 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:43:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,358 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:43:01,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:43:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:01,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:01,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:43:01,566 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 16:43:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469745934] [2020-10-15 16:43:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469745934] [2020-10-15 16:43:01,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687909887] [2020-10-15 16:43:01,651 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 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 [2020-10-15 16:43:01,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:43:01,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:01,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:43:01,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670018733] [2020-10-15 16:43:01,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:43:01,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:43:01,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:43:01,724 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:43:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,942 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:43:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:43:01,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:43:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,943 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:01,943 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:43:01,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:43:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:43:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 16:43:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:43:01,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:43:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,948 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:43:01,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:43:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:43:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:01,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,948 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:02,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 16:43:02,156 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 16:43:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:02,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848838995] [2020-10-15 16:43:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848838995] [2020-10-15 16:43:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145916162] [2020-10-15 16:43:02,250 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 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 [2020-10-15 16:43:02,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:02,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:02,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:02,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:43:02,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452272286] [2020-10-15 16:43:02,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:02,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:02,366 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:43:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:02,735 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:43:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:02,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:43:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:02,736 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:43:02,737 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:43:02,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:43:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:43:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 16:43:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:43:02,740 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:43:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:02,740 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:43:02,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:43:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:02,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:02,741 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:02,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:43:02,949 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 16:43:02,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:02,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913537015] [2020-10-15 16:43:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913537015] [2020-10-15 16:43:03,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434731622] [2020-10-15 16:43:03,026 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 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 [2020-10-15 16:43:03,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:43:03,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:03,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:43:03,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626102910] [2020-10-15 16:43:03,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:43:03,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:43:03,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:43:03,098 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:43:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:03,369 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 16:43:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:03,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:43:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:03,370 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:43:03,371 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:43:03,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:43:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:43:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 16:43:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:43:03,374 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:43:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:03,374 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:43:03,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:43:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:43:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:03,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:03,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:03,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:03,583 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:03,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 16:43:03,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:03,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369184118] [2020-10-15 16:43:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369184118] [2020-10-15 16:43:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157728500] [2020-10-15 16:43:03,685 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 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 [2020-10-15 16:43:03,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:43:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:43:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664122032] [2020-10-15 16:43:03,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:03,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:03,767 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:43:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:04,123 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 16:43:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:04,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:43:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:04,125 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:43:04,125 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:43:04,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:43:04,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 16:43:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:43:04,129 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:43:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:04,129 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:43:04,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:43:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:04,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:04,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:04,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:43:04,341 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 16:43:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:04,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192880562] [2020-10-15 16:43:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192880562] [2020-10-15 16:43:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875794263] [2020-10-15 16:43:04,414 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 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 [2020-10-15 16:43:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:04,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:04,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:43:04,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85771882] [2020-10-15 16:43:04,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:43:04,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:43:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:43:04,487 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:43:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:04,795 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:43:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:04,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:43:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:04,796 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:04,797 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:04,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:43:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 16:43:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 16:43:04,801 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 16:43:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:04,801 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 16:43:04,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:43:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 16:43:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:04,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:04,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:05,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:05,011 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:05,011 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 16:43:05,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:05,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890408053] [2020-10-15 16:43:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890408053] [2020-10-15 16:43:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951931093] [2020-10-15 16:43:05,085 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 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 [2020-10-15 16:43:05,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:05,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:43:05,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553672403] [2020-10-15 16:43:05,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:05,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:05,171 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 16:43:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:05,535 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-15 16:43:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:05,536 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:43:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:05,537 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:43:05,537 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:43:05,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:43:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-15 16:43:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:43:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 16:43:05,540 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 16:43:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:05,540 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 16:43:05,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 16:43:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:43:05,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:05,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:05,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:43:05,742 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 16:43:05,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:05,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107937942] [2020-10-15 16:43:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107937942] [2020-10-15 16:43:05,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568012001] [2020-10-15 16:43:05,817 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 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 [2020-10-15 16:43:05,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:43:05,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:43:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:05,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:43:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375132777] [2020-10-15 16:43:05,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:05,919 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 16:43:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:06,271 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 16:43:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:06,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:43:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:06,272 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:43:06,272 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:43:06,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:43:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 16:43:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:43:06,276 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 16:43:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:06,276 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:43:06,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:43:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:06,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:06,277 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:06,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:06,484 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 16:43:06,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:06,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584085067] [2020-10-15 16:43:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584085067] [2020-10-15 16:43:06,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160662504] [2020-10-15 16:43:06,566 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 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 [2020-10-15 16:43:06,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:06,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:06,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:06,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:06,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748357071] [2020-10-15 16:43:06,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:06,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:06,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:06,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:06,648 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 16:43:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:07,003 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 16:43:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:07,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:07,005 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:43:07,005 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:43:07,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:43:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 16:43:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:43:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 16:43:07,009 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 16:43:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:07,010 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 16:43:07,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 16:43:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:07,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:07,011 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:07,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 16:43:07,220 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 16:43:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:07,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694705346] [2020-10-15 16:43:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694705346] [2020-10-15 16:43:07,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174840992] [2020-10-15 16:43:07,324 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 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 [2020-10-15 16:43:07,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:07,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:07,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:07,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:07,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:07,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248180834] [2020-10-15 16:43:07,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:07,380 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 16:43:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:07,574 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 16:43:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:43:07,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:07,576 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:43:07,576 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 16:43:07,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:43:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 16:43:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 16:43:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 16:43:07,579 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 16:43:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:07,579 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 16:43:07,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 16:43:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:07,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:07,580 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:07,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:43:07,788 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 16:43:07,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:07,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350268197] [2020-10-15 16:43:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350268197] [2020-10-15 16:43:07,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740508719] [2020-10-15 16:43:07,900 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 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 [2020-10-15 16:43:07,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:07,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:07,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:08,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:08,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595027302] [2020-10-15 16:43:08,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:08,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:08,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:08,005 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 16:43:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:08,223 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 16:43:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:43:08,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:08,224 INFO L225 Difference]: With dead ends: 82 [2020-10-15 16:43:08,224 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 16:43:08,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:43:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 16:43:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 16:43:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:43:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 16:43:08,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 16:43:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:08,227 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 16:43:08,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 16:43:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:08,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:08,228 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:08,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:43:08,430 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 16:43:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:08,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68110388] [2020-10-15 16:43:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68110388] [2020-10-15 16:43:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587854489] [2020-10-15 16:43:08,532 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 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 [2020-10-15 16:43:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:08,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401278786] [2020-10-15 16:43:08,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:08,598 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 16:43:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:08,838 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 16:43:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:08,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:08,839 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:43:08,840 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:43:08,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:43:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:43:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 16:43:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:43:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 16:43:08,842 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 16:43:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:08,843 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 16:43:08,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 16:43:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:08,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:08,843 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:09,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 16:43:09,044 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 16:43:09,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:09,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963622362] [2020-10-15 16:43:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963622362] [2020-10-15 16:43:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107873188] [2020-10-15 16:43:09,162 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 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 [2020-10-15 16:43:09,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:09,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:09,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:09,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:09,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:09,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001933621] [2020-10-15 16:43:09,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:09,241 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 16:43:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:09,511 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 16:43:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:09,515 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:09,516 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:09,516 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:09,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:43:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 16:43:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 16:43:09,518 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 16:43:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:09,518 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 16:43:09,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 16:43:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:09,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:09,519 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:09,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:09,727 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 16:43:09,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:09,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823774737] [2020-10-15 16:43:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823774737] [2020-10-15 16:43:09,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569326094] [2020-10-15 16:43:09,825 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 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 [2020-10-15 16:43:09,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:43:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:09,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:09,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793233453] [2020-10-15 16:43:09,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:09,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:09,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:09,893 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 16:43:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,179 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 16:43:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:10,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,180 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:10,180 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:10,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 16:43:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:43:10,184 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 16:43:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,184 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:43:10,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:43:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:10,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,185 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:10,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:10,385 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 16:43:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:10,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170781346] [2020-10-15 16:43:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170781346] [2020-10-15 16:43:10,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570290426] [2020-10-15 16:43:10,488 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 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 [2020-10-15 16:43:10,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:10,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:10,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:10,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716693193] [2020-10-15 16:43:10,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:10,574 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 16:43:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,937 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 16:43:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:10,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,938 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:43:10,938 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:10,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 16:43:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:43:10,940 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 16:43:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,941 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:43:10,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:43:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:10,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,942 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:43:11,151 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 16:43:11,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014718534] [2020-10-15 16:43:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014718534] [2020-10-15 16:43:11,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744262813] [2020-10-15 16:43:11,236 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 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 [2020-10-15 16:43:11,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:11,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:11,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:11,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:11,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207157123] [2020-10-15 16:43:11,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:11,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:11,308 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 16:43:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:11,632 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 16:43:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:11,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:11,633 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:43:11,634 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:43:11,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:43:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 16:43:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:43:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 16:43:11,637 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 16:43:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:11,637 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 16:43:11,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 16:43:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:11,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:11,638 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,848 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 16:43:11,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138401349] [2020-10-15 16:43:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138401349] [2020-10-15 16:43:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270925783] [2020-10-15 16:43:11,931 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 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 [2020-10-15 16:43:11,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:11,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:11,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:12,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:12,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637396388] [2020-10-15 16:43:12,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:12,015 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 16:43:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:12,439 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 16:43:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:12,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:12,440 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:12,441 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:12,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 16:43:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:43:12,444 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 16:43:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:12,445 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:43:12,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:43:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:12,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:12,445 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:12,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:43:12,654 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 16:43:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:12,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498066990] [2020-10-15 16:43:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498066990] [2020-10-15 16:43:12,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800982380] [2020-10-15 16:43:12,729 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 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 [2020-10-15 16:43:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:12,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:43:12,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936909123] [2020-10-15 16:43:12,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:43:12,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:12,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:43:12,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:43:12,800 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 16:43:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:13,159 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:43:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:13,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:43:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:13,161 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:13,161 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:13,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 16:43:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 16:43:13,164 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 16:43:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:13,164 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 16:43:13,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:43:13,164 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 16:43:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:43:13,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:13,165 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:13,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:43:13,369 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 16:43:13,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:13,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410122144] [2020-10-15 16:43:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410122144] [2020-10-15 16:43:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808217735] [2020-10-15 16:43:13,447 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 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 [2020-10-15 16:43:13,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:43:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:13,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:13,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:43:13,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439375533] [2020-10-15 16:43:13,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:13,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:13,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:13,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:13,524 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 16:43:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:13,982 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 16:43:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:13,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:43:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:13,983 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:43:13,984 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:43:13,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:43:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 16:43:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:43:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 16:43:13,987 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 16:43:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:13,987 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 16:43:13,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 16:43:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:13,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:13,988 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:14,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:43:14,190 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 16:43:14,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:14,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440900600] [2020-10-15 16:43:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440900600] [2020-10-15 16:43:14,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755475174] [2020-10-15 16:43:14,306 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 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 [2020-10-15 16:43:14,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:43:14,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:14,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:14,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:14,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:14,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963974452] [2020-10-15 16:43:14,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:14,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:14,457 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 16:43:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:14,720 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:43:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:43:14,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:14,723 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:14,723 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:14,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:43:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 16:43:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:14,727 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:14,727 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:14,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:14,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:14,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:14,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:43:14,939 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 16:43:14,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:14,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041784780] [2020-10-15 16:43:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041784780] [2020-10-15 16:43:15,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858954775] [2020-10-15 16:43:15,069 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 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 [2020-10-15 16:43:15,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:15,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:15,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:15,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:15,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801651687] [2020-10-15 16:43:15,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:15,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:15,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:15,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:15,140 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:15,437 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 16:43:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:15,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:15,439 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:15,439 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:15,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:43:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:15,442 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:15,442 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:15,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:15,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:15,442 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:15,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:43:15,643 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 16:43:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:15,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470822726] [2020-10-15 16:43:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470822726] [2020-10-15 16:43:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99267018] [2020-10-15 16:43:15,755 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 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 [2020-10-15 16:43:15,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:15,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:15,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:15,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53386263] [2020-10-15 16:43:15,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:15,814 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:16,063 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:43:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:16,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:16,064 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:43:16,065 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:43:16,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:43:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:43:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 16:43:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:16,067 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:16,067 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:16,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:16,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:16,068 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:16,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:16,269 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 16:43:16,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:16,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241125700] [2020-10-15 16:43:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241125700] [2020-10-15 16:43:16,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548345260] [2020-10-15 16:43:16,385 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 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 [2020-10-15 16:43:16,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:16,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:16,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:16,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123391697] [2020-10-15 16:43:16,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:16,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:16,462 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:16,835 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 16:43:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:16,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:16,836 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:43:16,837 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:43:16,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:43:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 16:43:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:16,839 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:16,840 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:16,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:16,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:16,840 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:17,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:17,049 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 16:43:17,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:17,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430035651] [2020-10-15 16:43:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430035651] [2020-10-15 16:43:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915126458] [2020-10-15 16:43:17,146 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 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 [2020-10-15 16:43:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:17,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648487722] [2020-10-15 16:43:17,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:17,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:17,216 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:17,538 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:43:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:17,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:17,540 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:17,540 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:17,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 16:43:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:17,543 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:17,543 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:17,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:17,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:17,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:17,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 16:43:17,745 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 16:43:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:17,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107592121] [2020-10-15 16:43:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107592121] [2020-10-15 16:43:17,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451634584] [2020-10-15 16:43:17,840 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 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 [2020-10-15 16:43:17,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:17,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:17,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:17,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469111946] [2020-10-15 16:43:17,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:17,919 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:18,350 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:43:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:18,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:18,352 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:43:18,352 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:43:18,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:43:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 16:43:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:18,355 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:18,355 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:18,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:18,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:18,356 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:18,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,561 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 16:43:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:18,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798143023] [2020-10-15 16:43:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798143023] [2020-10-15 16:43:18,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643133709] [2020-10-15 16:43:18,661 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 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 [2020-10-15 16:43:18,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:43:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:18,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:18,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631654337] [2020-10-15 16:43:18,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:18,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:18,723 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:19,088 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 16:43:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:19,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:19,089 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:43:19,089 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 16:43:19,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 16:43:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 16:43:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:19,093 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:43:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:19,093 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:19,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:19,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:19,094 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:19,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 16:43:19,304 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 16:43:19,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:19,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833436591] [2020-10-15 16:43:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833436591] [2020-10-15 16:43:19,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411439689] [2020-10-15 16:43:19,404 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 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 [2020-10-15 16:43:19,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:19,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:19,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:19,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:19,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109362618] [2020-10-15 16:43:19,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:19,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:19,480 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:43:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:20,002 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 16:43:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:20,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:20,004 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:43:20,004 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:43:20,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:43:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 16:43:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:20,007 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:43:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:20,007 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:20,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:20,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:20,008 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:20,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:20,208 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 16:43:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:20,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120309603] [2020-10-15 16:43:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120309603] [2020-10-15 16:43:20,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103022242] [2020-10-15 16:43:20,303 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 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 [2020-10-15 16:43:20,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:43:20,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:20,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:20,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:43:20,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11533528] [2020-10-15 16:43:20,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:43:20,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:43:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:43:20,391 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:43:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:20,830 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:43:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:20,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:43:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:20,832 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:20,832 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:20,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 16:43:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 16:43:20,834 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 16:43:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:20,835 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 16:43:20,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:43:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 16:43:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:20,835 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:21,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 16:43:21,036 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 16:43:21,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:21,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382215298] [2020-10-15 16:43:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382215298] [2020-10-15 16:43:21,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160685591] [2020-10-15 16:43:21,132 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 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 [2020-10-15 16:43:21,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:43:21,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:21,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513735275] [2020-10-15 16:43:21,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:21,214 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 16:43:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:21,699 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-10-15 16:43:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:21,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:21,700 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:43:21,701 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 16:43:21,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 16:43:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-10-15 16:43:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:43:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 16:43:21,704 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 16:43:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:21,704 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 16:43:21,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 16:43:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:43:21,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:21,705 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:21,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:21,913 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 16:43:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:21,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132134622] [2020-10-15 16:43:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132134622] [2020-10-15 16:43:22,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137919520] [2020-10-15 16:43:22,013 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 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 [2020-10-15 16:43:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:22,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:43:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:22,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:22,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:43:22,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102500792] [2020-10-15 16:43:22,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:22,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:22,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:22,088 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 16:43:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:22,590 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 16:43:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:22,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:43:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:22,591 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:22,592 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:22,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 16:43:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:43:22,595 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 16:43:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:22,595 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:43:22,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:43:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:22,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:22,596 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:22,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 16:43:22,806 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 16:43:22,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:22,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178867265] [2020-10-15 16:43:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178867265] [2020-10-15 16:43:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131984000] [2020-10-15 16:43:22,913 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 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 [2020-10-15 16:43:22,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:22,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:22,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:22,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:22,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:22,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534836606] [2020-10-15 16:43:22,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:22,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:22,991 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 16:43:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:23,535 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 16:43:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:23,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:23,536 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:43:23,536 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:43:23,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:43:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 16:43:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:43:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 16:43:23,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 16:43:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:23,540 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 16:43:23,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 16:43:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:23,541 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:23,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:43:23,745 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 16:43:23,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:23,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423573197] [2020-10-15 16:43:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423573197] [2020-10-15 16:43:23,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28399871] [2020-10-15 16:43:23,887 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 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 [2020-10-15 16:43:23,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:23,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:23,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809975409] [2020-10-15 16:43:23,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:23,980 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 16:43:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:24,198 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 16:43:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:43:24,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:24,203 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:24,203 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:43:24,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:43:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:43:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 16:43:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 16:43:24,205 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 16:43:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:24,205 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 16:43:24,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 16:43:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:24,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:24,205 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:24,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:24,406 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 16:43:24,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:24,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114677383] [2020-10-15 16:43:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114677383] [2020-10-15 16:43:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222819361] [2020-10-15 16:43:24,546 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 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 [2020-10-15 16:43:24,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:24,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:24,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:24,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:24,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093165523] [2020-10-15 16:43:24,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:24,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:24,620 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 16:43:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:24,894 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 16:43:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:24,895 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:24,896 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:24,896 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:24,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:24,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 16:43:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 16:43:24,899 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 16:43:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:24,899 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 16:43:24,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 16:43:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:24,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:24,900 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:25,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:25,108 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 16:43:25,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:25,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707779081] [2020-10-15 16:43:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707779081] [2020-10-15 16:43:25,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067662140] [2020-10-15 16:43:25,246 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 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 [2020-10-15 16:43:25,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:25,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:25,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:25,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:25,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330004397] [2020-10-15 16:43:25,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:25,304 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 16:43:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:25,605 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 16:43:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:25,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:25,607 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:25,607 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:25,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 16:43:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:43:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 16:43:25,609 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 16:43:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:25,610 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 16:43:25,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 16:43:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:25,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:25,610 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:25,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:25,818 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:25,818 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 16:43:25,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:25,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613084038] [2020-10-15 16:43:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613084038] [2020-10-15 16:43:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494462342] [2020-10-15 16:43:25,951 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 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 [2020-10-15 16:43:26,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:26,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:26,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:26,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772694268] [2020-10-15 16:43:26,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:26,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:26,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:26,077 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 16:43:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:26,523 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 16:43:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:26,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:26,525 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:26,525 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:26,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 16:43:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 16:43:26,529 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 16:43:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:26,530 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 16:43:26,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 16:43:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:26,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:26,531 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:26,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,740 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 16:43:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346769396] [2020-10-15 16:43:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346769396] [2020-10-15 16:43:26,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935725446] [2020-10-15 16:43:26,915 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 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 [2020-10-15 16:43:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:27,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:27,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354572355] [2020-10-15 16:43:27,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:27,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:27,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:27,007 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 16:43:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:27,339 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:27,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:27,341 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:27,341 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:27,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 16:43:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:43:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 16:43:27,343 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 16:43:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:27,343 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 16:43:27,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 16:43:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:27,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:27,344 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:27,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 16:43:27,552 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:27,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:27,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 16:43:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:27,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646063562] [2020-10-15 16:43:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646063562] [2020-10-15 16:43:27,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160862876] [2020-10-15 16:43:27,684 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 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 [2020-10-15 16:43:27,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:27,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:27,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:27,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022561016] [2020-10-15 16:43:27,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:27,764 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 16:43:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:28,192 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 16:43:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:28,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:28,194 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:43:28,194 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:43:28,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:43:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 16:43:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 16:43:28,196 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 16:43:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:28,196 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 16:43:28,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 16:43:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:28,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:28,197 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:28,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,398 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 16:43:28,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803306768] [2020-10-15 16:43:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803306768] [2020-10-15 16:43:28,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989991174] [2020-10-15 16:43:28,498 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 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 [2020-10-15 16:43:28,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:28,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:28,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683992537] [2020-10-15 16:43:28,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:28,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:28,563 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 16:43:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:28,951 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 16:43:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:28,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:28,952 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:28,953 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:28,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 16:43:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:28,956 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 16:43:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:28,956 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:28,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:28,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:28,957 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:29,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 16:43:29,157 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 16:43:29,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:29,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420489577] [2020-10-15 16:43:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420489577] [2020-10-15 16:43:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117034887] [2020-10-15 16:43:29,260 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 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 [2020-10-15 16:43:29,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:29,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:29,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:29,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:29,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598869178] [2020-10-15 16:43:29,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:29,353 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 16:43:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:29,836 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:43:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:29,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:29,837 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:29,837 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:29,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 16:43:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:29,840 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 16:43:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:29,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:29,841 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:30,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:30,048 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 16:43:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:30,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853977608] [2020-10-15 16:43:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853977608] [2020-10-15 16:43:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516171852] [2020-10-15 16:43:30,158 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 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 [2020-10-15 16:43:30,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:30,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:30,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:30,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163443786] [2020-10-15 16:43:30,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:30,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:30,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:30,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:30,217 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 16:43:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:30,655 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 16:43:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:30,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:30,657 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:30,657 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:30,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 16:43:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 16:43:30,661 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 16:43:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:30,661 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 16:43:30,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 16:43:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:30,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:30,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:30,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:43:30,867 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:30,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 16:43:30,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:30,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317121156] [2020-10-15 16:43:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317121156] [2020-10-15 16:43:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356240030] [2020-10-15 16:43:30,989 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 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 [2020-10-15 16:43:31,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:31,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:31,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:31,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:31,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:31,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:31,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621595500] [2020-10-15 16:43:31,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:31,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:31,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:31,071 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 16:43:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:31,628 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 16:43:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:31,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:31,630 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:31,630 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:43:31,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:43:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 16:43:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:43:31,633 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 16:43:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:31,633 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:43:31,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:43:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:31,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:31,634 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:31,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:31,842 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 16:43:31,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:31,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160764176] [2020-10-15 16:43:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160764176] [2020-10-15 16:43:31,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248125008] [2020-10-15 16:43:31,942 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 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 [2020-10-15 16:43:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:32,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:32,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134602487] [2020-10-15 16:43:32,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:32,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:32,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:32,003 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 16:43:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:32,492 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 16:43:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:32,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:32,494 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:43:32,494 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:43:32,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:43:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 16:43:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 16:43:32,497 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 16:43:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:32,498 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 16:43:32,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 16:43:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:32,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:32,498 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:32,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:32,700 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 16:43:32,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:32,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409784081] [2020-10-15 16:43:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409784081] [2020-10-15 16:43:32,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548339672] [2020-10-15 16:43:32,807 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 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 [2020-10-15 16:43:32,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:32,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:32,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:32,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:32,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312045431] [2020-10-15 16:43:32,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:32,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:32,890 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 16:43:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:33,485 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 16:43:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:33,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:33,486 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:33,486 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:33,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 16:43:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 16:43:33,489 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 16:43:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:33,489 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 16:43:33,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 16:43:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:33,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:33,490 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:33,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:33,698 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 16:43:33,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:33,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839787258] [2020-10-15 16:43:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839787258] [2020-10-15 16:43:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948535311] [2020-10-15 16:43:33,859 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 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 [2020-10-15 16:43:33,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:33,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:33,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:33,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423217550] [2020-10-15 16:43:33,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:33,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:33,916 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 16:43:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:34,227 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 16:43:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:34,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:34,229 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:34,229 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:34,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 16:43:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:34,232 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:34,232 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:34,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:34,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:34,233 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:34,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:34,433 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 16:43:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:34,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471962779] [2020-10-15 16:43:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471962779] [2020-10-15 16:43:34,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056508177] [2020-10-15 16:43:34,586 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 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 [2020-10-15 16:43:34,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:34,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:34,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:34,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:34,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286938442] [2020-10-15 16:43:34,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:34,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:34,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:34,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:34,663 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:35,032 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 16:43:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:35,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:35,033 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:35,034 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:35,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 16:43:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:35,037 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:35,037 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:35,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:35,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:35,038 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:35,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:35,246 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 16:43:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:35,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739417745] [2020-10-15 16:43:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739417745] [2020-10-15 16:43:35,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91059555] [2020-10-15 16:43:35,389 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 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 [2020-10-15 16:43:35,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:35,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311640598] [2020-10-15 16:43:35,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:35,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:35,452 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:35,790 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 16:43:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:35,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:35,792 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:35,792 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:35,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 16:43:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:35,795 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:35,795 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:35,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:35,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:35,796 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:36,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,001 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 16:43:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:36,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068058531] [2020-10-15 16:43:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068058531] [2020-10-15 16:43:36,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636082231] [2020-10-15 16:43:36,144 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 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 [2020-10-15 16:43:36,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:36,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:36,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:36,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239408152] [2020-10-15 16:43:36,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:36,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:36,222 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:36,671 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 16:43:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:36,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:36,673 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:36,673 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:36,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 16:43:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:36,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:36,677 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:36,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:36,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:36,678 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:36,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,889 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 16:43:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:36,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914990688] [2020-10-15 16:43:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914990688] [2020-10-15 16:43:37,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057897439] [2020-10-15 16:43:37,031 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 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 [2020-10-15 16:43:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:37,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:37,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203111723] [2020-10-15 16:43:37,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:37,088 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:37,485 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 16:43:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:37,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:37,486 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:37,487 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:37,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 16:43:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:37,490 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:37,490 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:37,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:37,491 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:37,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 16:43:37,696 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 16:43:37,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:37,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782391707] [2020-10-15 16:43:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782391707] [2020-10-15 16:43:37,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712369749] [2020-10-15 16:43:37,839 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 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 [2020-10-15 16:43:37,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:37,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:37,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:37,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:37,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:37,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70072726] [2020-10-15 16:43:37,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:37,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:37,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:37,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:37,916 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:38,429 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 16:43:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:38,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:38,431 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:38,431 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:38,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 16:43:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:38,435 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:38,435 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:38,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:38,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:38,436 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:38,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:38,636 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 16:43:38,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:38,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376487916] [2020-10-15 16:43:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376487916] [2020-10-15 16:43:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262039629] [2020-10-15 16:43:38,768 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 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 [2020-10-15 16:43:38,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:38,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:38,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:38,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:38,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865983147] [2020-10-15 16:43:38,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:38,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:38,829 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:39,273 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 16:43:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:39,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:39,274 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:39,274 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:39,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 16:43:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:39,276 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:39,277 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:39,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:39,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:39,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:39,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 16:43:39,478 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:39,478 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 16:43:39,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:39,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271552875] [2020-10-15 16:43:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271552875] [2020-10-15 16:43:39,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405911488] [2020-10-15 16:43:39,612 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 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 [2020-10-15 16:43:39,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:39,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:39,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:39,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215980437] [2020-10-15 16:43:39,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:39,690 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:40,277 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:43:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:40,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:40,279 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:40,279 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:40,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 16:43:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:40,282 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:40,282 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:40,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:40,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:40,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:40,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:40,484 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 16:43:40,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:40,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841086069] [2020-10-15 16:43:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841086069] [2020-10-15 16:43:40,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109754813] [2020-10-15 16:43:40,605 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 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 [2020-10-15 16:43:40,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:40,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:40,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:40,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376649042] [2020-10-15 16:43:40,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:40,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:40,690 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:41,178 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 16:43:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:41,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:41,180 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:43:41,180 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:41,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 16:43:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:41,184 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:41,184 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:41,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:41,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:41,185 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:41,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:41,395 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 16:43:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:41,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347334339] [2020-10-15 16:43:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347334339] [2020-10-15 16:43:41,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356366331] [2020-10-15 16:43:41,515 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 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 [2020-10-15 16:43:41,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:41,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:41,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:41,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:41,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798795985] [2020-10-15 16:43:41,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:41,602 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:42,270 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 16:43:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:42,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:42,272 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:43:42,272 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:42,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 16:43:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:42,275 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:42,275 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:42,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:42,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:42,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:42,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:42,476 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 16:43:42,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:42,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779271054] [2020-10-15 16:43:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779271054] [2020-10-15 16:43:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091704190] [2020-10-15 16:43:42,599 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 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 [2020-10-15 16:43:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:42,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:42,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378675911] [2020-10-15 16:43:42,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:42,662 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:43,199 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:43:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:43,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:43,201 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:43,201 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:43,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 16:43:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:43:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 16:43:43,205 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 16:43:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:43,205 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 16:43:43,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 16:43:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:43,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:43,206 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:43,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:43,415 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 16:43:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:43,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058249300] [2020-10-15 16:43:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058249300] [2020-10-15 16:43:43,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558173263] [2020-10-15 16:43:43,540 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 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 [2020-10-15 16:43:43,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:43,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:43,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:43,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:43,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178541880] [2020-10-15 16:43:43,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:43,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:43,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:43,627 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 16:43:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:44,272 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-15 16:43:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:44,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:44,273 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:43:44,273 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:43:44,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:43:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-15 16:43:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:43:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 16:43:44,276 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 16:43:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:44,276 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 16:43:44,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 16:43:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:44,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:44,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:44,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:44,483 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:44,484 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 16:43:44,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:44,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233123572] [2020-10-15 16:43:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233123572] [2020-10-15 16:43:44,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533789964] [2020-10-15 16:43:44,600 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 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 [2020-10-15 16:43:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:44,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:44,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:44,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:44,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394685810] [2020-10-15 16:43:44,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:44,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:44,684 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 16:43:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:45,336 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:43:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:45,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:45,338 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:45,338 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:45,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 16:43:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:45,341 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 16:43:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:45,341 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:45,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:45,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:45,342 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:45,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:45,542 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 16:43:45,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:45,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782346492] [2020-10-15 16:43:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782346492] [2020-10-15 16:43:45,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609107707] [2020-10-15 16:43:45,684 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 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 [2020-10-15 16:43:45,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:45,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:45,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:45,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196439607] [2020-10-15 16:43:45,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:45,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:45,764 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 16:43:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:46,470 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 16:43:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:46,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:46,472 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:46,472 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:43:46,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:43:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 16:43:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 16:43:46,474 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 16:43:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:46,474 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 16:43:46,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 16:43:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:46,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:46,475 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:46,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 16:43:46,676 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 16:43:46,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:46,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421466814] [2020-10-15 16:43:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421466814] [2020-10-15 16:43:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478059846] [2020-10-15 16:43:46,848 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 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 [2020-10-15 16:43:46,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:46,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:46,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904403301] [2020-10-15 16:43:46,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:46,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:46,907 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 16:43:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:47,211 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:43:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:47,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:47,212 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:47,213 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:47,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 16:43:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 16:43:47,215 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 16:43:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:47,215 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 16:43:47,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 16:43:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:47,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:47,216 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:47,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:47,416 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 16:43:47,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:47,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624141696] [2020-10-15 16:43:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624141696] [2020-10-15 16:43:47,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173935068] [2020-10-15 16:43:47,598 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 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 [2020-10-15 16:43:47,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:47,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:47,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:47,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035862669] [2020-10-15 16:43:47,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:47,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:47,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:47,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:47,685 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 16:43:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:48,033 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 16:43:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:48,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:48,035 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:48,035 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:48,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 16:43:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 16:43:48,038 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 16:43:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:48,038 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 16:43:48,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 16:43:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:48,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:48,039 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:48,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 16:43:48,240 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 16:43:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:48,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878174391] [2020-10-15 16:43:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878174391] [2020-10-15 16:43:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761886123] [2020-10-15 16:43:48,415 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 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 [2020-10-15 16:43:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:48,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268627711] [2020-10-15 16:43:48,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:48,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:48,471 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 16:43:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:48,870 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:48,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:48,871 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:48,871 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:48,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 16:43:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 16:43:48,873 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 16:43:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:48,874 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 16:43:48,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 16:43:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:48,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:48,875 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:49,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:49,083 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 16:43:49,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:49,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146834618] [2020-10-15 16:43:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146834618] [2020-10-15 16:43:49,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386145018] [2020-10-15 16:43:49,318 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 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 [2020-10-15 16:43:49,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:49,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:49,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:49,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:49,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609838741] [2020-10-15 16:43:49,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:49,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:49,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:49,459 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 16:43:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:49,828 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 16:43:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:49,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:49,829 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:49,829 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:49,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 16:43:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 16:43:49,832 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 16:43:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:49,832 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 16:43:49,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 16:43:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:49,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:49,833 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:50,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:50,041 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 16:43:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:50,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917565587] [2020-10-15 16:43:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917565587] [2020-10-15 16:43:50,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8718409] [2020-10-15 16:43:50,208 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 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 [2020-10-15 16:43:50,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:50,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:50,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:50,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531966869] [2020-10-15 16:43:50,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:50,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:50,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:50,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:50,277 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 16:43:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:50,699 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 16:43:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:50,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:50,700 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:50,700 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:50,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 16:43:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 16:43:50,703 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 16:43:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:50,703 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 16:43:50,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 16:43:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:50,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:50,704 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:50,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:43:50,908 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 16:43:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:50,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711455588] [2020-10-15 16:43:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711455588] [2020-10-15 16:43:51,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621404195] [2020-10-15 16:43:51,078 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 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 [2020-10-15 16:43:51,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:51,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:51,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:51,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974957648] [2020-10-15 16:43:51,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:51,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:51,150 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 16:43:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:51,666 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 16:43:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:51,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:51,668 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:43:51,668 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:43:51,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:43:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:43:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 16:43:51,671 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 16:43:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:51,671 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 16:43:51,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 16:43:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:51,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:51,672 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:51,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:43:51,881 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 16:43:51,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:51,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793086765] [2020-10-15 16:43:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793086765] [2020-10-15 16:43:52,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345024430] [2020-10-15 16:43:52,033 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 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 [2020-10-15 16:43:52,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:52,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:52,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:52,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3674759] [2020-10-15 16:43:52,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:52,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:52,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:52,096 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 16:43:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:52,571 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 16:43:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:52,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:52,573 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:52,573 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:52,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:43:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 16:43:52,576 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 16:43:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:52,576 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 16:43:52,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 16:43:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:52,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:52,578 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:52,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:52,778 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 16:43:52,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:52,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700704822] [2020-10-15 16:43:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:52,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700704822] [2020-10-15 16:43:52,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92896773] [2020-10-15 16:43:52,936 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 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 [2020-10-15 16:43:52,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:53,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:53,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:53,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727370779] [2020-10-15 16:43:53,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:53,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:53,018 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 16:43:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:53,600 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 16:43:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:53,600 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:53,601 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:53,601 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:53,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 16:43:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 16:43:53,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 16:43:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:53,605 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 16:43:53,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 16:43:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:53,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:53,605 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:53,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:43:53,809 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 16:43:53,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:53,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799448076] [2020-10-15 16:43:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:53,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799448076] [2020-10-15 16:43:53,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774099594] [2020-10-15 16:43:53,946 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 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 [2020-10-15 16:43:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:53,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:54,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:54,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572103364] [2020-10-15 16:43:54,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:54,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:54,008 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 16:43:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:54,537 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 16:43:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:54,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:54,539 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:43:54,539 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:43:54,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:43:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 16:43:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:54,543 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 16:43:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:54,543 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:54,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:54,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:54,544 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:54,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:54,747 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:54,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 16:43:54,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:54,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969144358] [2020-10-15 16:43:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969144358] [2020-10-15 16:43:54,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568096724] [2020-10-15 16:43:54,908 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 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 [2020-10-15 16:43:54,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:54,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:54,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:54,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:54,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676871650] [2020-10-15 16:43:54,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:54,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:54,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:54,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:54,992 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 16:43:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:55,639 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 16:43:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:55,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:55,641 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:43:55,641 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:43:55,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:43:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 16:43:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:55,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 16:43:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:55,644 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:55,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:55,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:55,645 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:55,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 16:43:55,845 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 16:43:55,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:55,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091656163] [2020-10-15 16:43:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091656163] [2020-10-15 16:43:55,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452801633] [2020-10-15 16:43:55,985 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 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 [2020-10-15 16:43:56,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:56,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:56,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:56,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034268628] [2020-10-15 16:43:56,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:56,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:56,052 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 16:43:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:56,621 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 16:43:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:56,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:56,623 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:56,623 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:56,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 16:43:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:43:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 16:43:56,625 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 16:43:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:56,625 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 16:43:56,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 16:43:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:56,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:56,626 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:56,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:56,826 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 16:43:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:56,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279392896] [2020-10-15 16:43:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279392896] [2020-10-15 16:43:56,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316465539] [2020-10-15 16:43:56,964 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 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 [2020-10-15 16:43:57,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:57,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:57,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:57,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:57,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:57,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816949602] [2020-10-15 16:43:57,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:57,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:57,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:57,043 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 16:43:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:57,769 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 16:43:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:57,770 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:57,771 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:57,771 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:43:57,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:43:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 16:43:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:57,774 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 16:43:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:57,775 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:57,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:57,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:57,776 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:57,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:43:57,984 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:57,984 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 16:43:57,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:57,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509578814] [2020-10-15 16:43:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509578814] [2020-10-15 16:43:58,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982193762] [2020-10-15 16:43:58,125 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 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 [2020-10-15 16:43:58,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:58,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:58,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:58,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918647108] [2020-10-15 16:43:58,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:58,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:58,199 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 16:43:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:58,926 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:43:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:58,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:58,928 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:43:58,928 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:43:58,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:43:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 16:43:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 16:43:58,934 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 16:43:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:58,935 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 16:43:58,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 16:43:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:58,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:58,936 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:59,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:43:59,138 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 16:43:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:59,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14521243] [2020-10-15 16:43:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14521243] [2020-10-15 16:43:59,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697191644] [2020-10-15 16:43:59,291 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 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 [2020-10-15 16:43:59,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:59,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:59,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:59,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179503013] [2020-10-15 16:43:59,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:59,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:59,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:59,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:59,426 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 16:44:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:00,250 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 16:44:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:00,251 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:44:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:00,251 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:44:00,251 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:44:00,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:44:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 16:44:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 16:44:00,254 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 16:44:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:00,254 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 16:44:00,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 16:44:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:00,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:00,256 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:00,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:00,457 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 16:44:00,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:00,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092519960] [2020-10-15 16:44:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092519960] [2020-10-15 16:44:00,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959797539] [2020-10-15 16:44:00,666 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 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 [2020-10-15 16:44:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:00,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078769034] [2020-10-15 16:44:00,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:00,724 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 16:44:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:01,095 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 16:44:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:44:01,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:01,096 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:01,097 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:01,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:44:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 16:44:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:01,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:01,099 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:01,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:01,100 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:01,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:01,304 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:01,304 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 16:44:01,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:01,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160737808] [2020-10-15 16:44:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160737808] [2020-10-15 16:44:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006292189] [2020-10-15 16:44:01,515 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 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 [2020-10-15 16:44:01,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:01,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:01,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:01,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41846966] [2020-10-15 16:44:01,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:01,594 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:02,046 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 16:44:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:44:02,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:02,047 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:44:02,047 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:44:02,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:44:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:44:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 16:44:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:02,050 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:02,050 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:02,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:02,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:02,051 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:02,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:44:02,251 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 16:44:02,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:02,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320951065] [2020-10-15 16:44:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320951065] [2020-10-15 16:44:02,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873764371] [2020-10-15 16:44:02,440 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 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 [2020-10-15 16:44:02,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:44:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:02,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:02,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907001373] [2020-10-15 16:44:02,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:02,503 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:02,908 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:44:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:02,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:02,909 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:02,909 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:44:02,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:44:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:44:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 16:44:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:02,914 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:02,914 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:02,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:02,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:02,915 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:03,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:03,124 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 16:44:03,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:03,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255036691] [2020-10-15 16:44:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255036691] [2020-10-15 16:44:03,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301517213] [2020-10-15 16:44:03,315 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 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 [2020-10-15 16:44:03,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:03,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:03,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:03,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:03,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890846109] [2020-10-15 16:44:03,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:03,406 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:03,937 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 16:44:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:03,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:03,938 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:44:03,938 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:03,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:44:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 16:44:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:03,941 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:03,941 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:03,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:03,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:03,942 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:04,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 16:44:04,143 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 16:44:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:04,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414541580] [2020-10-15 16:44:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:04,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414541580] [2020-10-15 16:44:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042178095] [2020-10-15 16:44:04,316 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 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 [2020-10-15 16:44:04,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:44:04,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:04,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:04,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:04,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:04,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219511022] [2020-10-15 16:44:04,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:04,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:04,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:04,383 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:04,857 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:44:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:04,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:04,859 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:44:04,859 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:44:04,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:44:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 16:44:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:04,864 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:04,865 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:04,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:04,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:04,865 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:05,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:44:05,073 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 16:44:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:05,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600089173] [2020-10-15 16:44:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600089173] [2020-10-15 16:44:05,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640147819] [2020-10-15 16:44:05,259 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 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 [2020-10-15 16:44:05,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:44:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:05,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:05,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:05,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:05,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404046550] [2020-10-15 16:44:05,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:05,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:05,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:05,347 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:05,954 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 16:44:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:05,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:05,956 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:44:05,956 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:44:05,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:44:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 16:44:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:05,959 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:05,959 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:05,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:05,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:05,960 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:06,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 16:44:06,167 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 16:44:06,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:06,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647556959] [2020-10-15 16:44:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:06,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647556959] [2020-10-15 16:44:06,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427544067] [2020-10-15 16:44:06,340 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 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 [2020-10-15 16:44:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:06,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:06,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:06,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44554045] [2020-10-15 16:44:06,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:06,405 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:06,934 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 16:44:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:06,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:06,935 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:44:06,935 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:44:06,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:44:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 16:44:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:06,939 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:06,939 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:06,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:06,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:06,940 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:07,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:07,143 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:07,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 16:44:07,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:07,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555046089] [2020-10-15 16:44:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555046089] [2020-10-15 16:44:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434977896] [2020-10-15 16:44:07,319 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 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 [2020-10-15 16:44:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:07,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:07,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:07,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:07,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:07,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602606053] [2020-10-15 16:44:07,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:07,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:07,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:07,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:07,401 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:08,093 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:44:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:08,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:08,095 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:44:08,095 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:44:08,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:44:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 16:44:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:08,098 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:08,098 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:08,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:08,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:08,099 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:08,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 16:44:08,307 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 16:44:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:08,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481707008] [2020-10-15 16:44:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481707008] [2020-10-15 16:44:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459398488] [2020-10-15 16:44:08,464 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 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 [2020-10-15 16:44:08,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:44:08,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:08,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:08,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525825916] [2020-10-15 16:44:08,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:08,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:08,530 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:09,119 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 16:44:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:09,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:09,121 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:44:09,121 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:44:09,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:44:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 16:44:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:09,124 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:09,124 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:09,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:09,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:09,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:09,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:09,327 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:09,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 16:44:09,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:09,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604603900] [2020-10-15 16:44:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604603900] [2020-10-15 16:44:09,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476114546] [2020-10-15 16:44:09,500 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 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 [2020-10-15 16:44:09,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:09,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:09,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:09,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007572697] [2020-10-15 16:44:09,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:09,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:09,581 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:10,356 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:44:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:10,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:10,357 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:44:10,357 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:44:10,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:44:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 16:44:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:10,360 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:10,360 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:10,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:10,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:10,361 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:10,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:10,561 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 16:44:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:10,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104561666] [2020-10-15 16:44:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104561666] [2020-10-15 16:44:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119483975] [2020-10-15 16:44:10,720 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 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 [2020-10-15 16:44:10,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:44:10,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:10,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726043215] [2020-10-15 16:44:10,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:10,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:10,794 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:11,443 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:44:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:11,444 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:11,445 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:44:11,445 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:44:11,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:44:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 16:44:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:11,448 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:44:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:11,448 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:11,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:11,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:11,449 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:11,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:11,658 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 16:44:11,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:11,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161020224] [2020-10-15 16:44:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:11,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161020224] [2020-10-15 16:44:11,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964769147] [2020-10-15 16:44:11,824 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 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 [2020-10-15 16:44:11,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:44:11,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:11,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:11,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:11,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:11,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936218729] [2020-10-15 16:44:11,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:11,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:11,950 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:44:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:12,900 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 16:44:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:12,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:12,901 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:44:12,901 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:44:12,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:44:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 16:44:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:12,904 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:44:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:12,904 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:12,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:12,905 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:13,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:13,106 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 16:44:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:13,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082749004] [2020-10-15 16:44:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082749004] [2020-10-15 16:44:13,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55244666] [2020-10-15 16:44:13,268 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 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 [2020-10-15 16:44:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:13,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:44:13,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597596726] [2020-10-15 16:44:13,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:44:13,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:44:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:44:13,333 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:44:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:14,026 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:44:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:14,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:44:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:14,028 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:44:14,028 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:14,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 16:44:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:44:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 16:44:14,031 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 16:44:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:14,031 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 16:44:14,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:44:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 16:44:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:14,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:14,031 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:14,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:44:14,234 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 16:44:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:14,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868439957] [2020-10-15 16:44:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868439957] [2020-10-15 16:44:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907492274] [2020-10-15 16:44:14,395 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 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 [2020-10-15 16:44:14,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:14,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:14,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:14,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517676787] [2020-10-15 16:44:14,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:14,525 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 16:44:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:15,480 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 16:44:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:15,481 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:15,481 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:44:15,481 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:44:15,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:44:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 16:44:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:44:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 16:44:15,484 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 16:44:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:15,484 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 16:44:15,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 16:44:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:44:15,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:15,485 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:15,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 16:44:15,686 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 16:44:15,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:15,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369389538] [2020-10-15 16:44:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369389538] [2020-10-15 16:44:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155203820] [2020-10-15 16:44:15,843 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 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 [2020-10-15 16:44:15,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:44:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:44:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:15,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:15,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:44:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716480585] [2020-10-15 16:44:15,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:15,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:15,933 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 16:44:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:16,776 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 16:44:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:16,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:44:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:16,777 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:44:16,777 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:44:16,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:44:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 16:44:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:44:16,779 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 16:44:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:16,779 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:44:16,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:44:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:16,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:16,780 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:16,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:44:16,981 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:16,981 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 16:44:16,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:16,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125545428] [2020-10-15 16:44:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125545428] [2020-10-15 16:44:17,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485229868] [2020-10-15 16:44:17,147 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 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 [2020-10-15 16:44:17,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:17,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:17,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:17,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:17,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:17,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650269101] [2020-10-15 16:44:17,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:17,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:17,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:17,234 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 16:44:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:18,148 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 16:44:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:18,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:18,149 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:44:18,149 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:44:18,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:44:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 16:44:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:44:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 16:44:18,151 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 16:44:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:18,152 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 16:44:18,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 16:44:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:18,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:18,152 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:18,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:44:18,353 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 16:44:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:18,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130800855] [2020-10-15 16:44:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130800855] [2020-10-15 16:44:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205364205] [2020-10-15 16:44:18,581 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 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 [2020-10-15 16:44:18,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:18,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:18,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813585520] [2020-10-15 16:44:18,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:18,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:18,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:18,656 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 16:44:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:19,003 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 16:44:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:44:19,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:19,005 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:44:19,005 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:44:19,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:44:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:44:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 16:44:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:44:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 16:44:19,007 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 16:44:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:19,007 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 16:44:19,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 16:44:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:19,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:19,008 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:19,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:19,211 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 16:44:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:19,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39623679] [2020-10-15 16:44:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39623679] [2020-10-15 16:44:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761747801] [2020-10-15 16:44:19,446 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 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 [2020-10-15 16:44:19,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:19,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:19,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:19,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346480482] [2020-10-15 16:44:19,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:19,529 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 16:44:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:19,974 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 16:44:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:44:19,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:19,976 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:44:19,976 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:44:19,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:44:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:44:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:44:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:44:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 16:44:19,979 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 16:44:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:19,979 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 16:44:19,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 16:44:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:19,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:19,980 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:20,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 16:44:20,182 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:20,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 16:44:20,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:20,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699979446] [2020-10-15 16:44:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699979446] [2020-10-15 16:44:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132705586] [2020-10-15 16:44:20,407 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 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 [2020-10-15 16:44:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:20,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:20,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:20,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343914948] [2020-10-15 16:44:20,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:20,471 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 16:44:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:20,938 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 16:44:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:20,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:20,939 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:44:20,939 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:20,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:44:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:44:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 16:44:20,942 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 16:44:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:20,943 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 16:44:20,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 16:44:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:20,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:20,944 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:21,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:44:21,153 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 16:44:21,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:21,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317376879] [2020-10-15 16:44:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317376879] [2020-10-15 16:44:21,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28251906] [2020-10-15 16:44:21,377 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 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 [2020-10-15 16:44:21,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:21,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:21,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:21,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024343336] [2020-10-15 16:44:21,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:21,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:21,463 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 16:44:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:21,975 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 16:44:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:21,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:21,976 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:21,976 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:21,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 16:44:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:44:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 16:44:21,979 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 16:44:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:21,979 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 16:44:21,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 16:44:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:21,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:21,980 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:22,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 16:44:22,180 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:22,181 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 16:44:22,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:22,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512262794] [2020-10-15 16:44:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512262794] [2020-10-15 16:44:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655963989] [2020-10-15 16:44:22,389 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 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 [2020-10-15 16:44:22,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:22,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:22,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:22,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:22,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708128207] [2020-10-15 16:44:22,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:22,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:22,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:22,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:22,452 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 16:44:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:22,978 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 16:44:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:22,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:22,980 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:22,980 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:22,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 16:44:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:44:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 16:44:22,983 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 16:44:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:22,983 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 16:44:22,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 16:44:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:22,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:22,984 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:23,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:23,191 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 16:44:23,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:23,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931136429] [2020-10-15 16:44:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:23,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931136429] [2020-10-15 16:44:23,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305213168] [2020-10-15 16:44:23,403 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 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 [2020-10-15 16:44:23,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:23,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:23,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:23,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:23,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395667017] [2020-10-15 16:44:23,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:23,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:23,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:23,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:23,486 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 16:44:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:24,106 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 16:44:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:24,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:24,107 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:44:24,107 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:44:24,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:44:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 16:44:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:44:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 16:44:24,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 16:44:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:24,110 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 16:44:24,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 16:44:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:24,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:24,111 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:24,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:24,312 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:24,312 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 16:44:24,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:24,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503088266] [2020-10-15 16:44:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503088266] [2020-10-15 16:44:24,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146025701] [2020-10-15 16:44:24,513 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 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 [2020-10-15 16:44:24,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:24,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:24,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334241817] [2020-10-15 16:44:24,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:24,589 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 16:44:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:25,155 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 16:44:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:25,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:25,157 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:25,157 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:25,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 16:44:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:44:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 16:44:25,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 16:44:25,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:25,160 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 16:44:25,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 16:44:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:25,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:25,160 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:25,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:25,361 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 16:44:25,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:25,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413607482] [2020-10-15 16:44:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413607482] [2020-10-15 16:44:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729051123] [2020-10-15 16:44:25,556 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 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 [2020-10-15 16:44:25,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:25,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:25,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:25,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:25,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:25,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099877722] [2020-10-15 16:44:25,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:25,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:25,686 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 16:44:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:26,397 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 16:44:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:26,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:26,398 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:26,398 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:26,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 16:44:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 16:44:26,400 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 16:44:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:26,401 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 16:44:26,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 16:44:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:26,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:26,402 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:26,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:44:26,603 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:26,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 16:44:26,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:26,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069313099] [2020-10-15 16:44:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069313099] [2020-10-15 16:44:26,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231022242] [2020-10-15 16:44:26,793 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 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 [2020-10-15 16:44:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:26,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:26,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:26,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877037285] [2020-10-15 16:44:26,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:26,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:26,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:26,862 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 16:44:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:27,485 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 16:44:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:27,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:27,486 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:27,486 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:27,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 16:44:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 16:44:27,489 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 16:44:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:27,489 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 16:44:27,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 16:44:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:27,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:27,490 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:27,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:27,697 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:27,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 16:44:27,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:27,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956824477] [2020-10-15 16:44:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956824477] [2020-10-15 16:44:27,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567428479] [2020-10-15 16:44:27,893 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 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 [2020-10-15 16:44:27,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:27,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:27,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834843561] [2020-10-15 16:44:27,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:27,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:27,975 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 16:44:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:28,741 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 16:44:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:28,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:28,742 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:44:28,742 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:44:28,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:44:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 16:44:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:44:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 16:44:28,745 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 16:44:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:28,745 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 16:44:28,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 16:44:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:28,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:28,746 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:28,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:44:28,951 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 16:44:28,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:28,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086032222] [2020-10-15 16:44:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086032222] [2020-10-15 16:44:29,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402705788] [2020-10-15 16:44:29,137 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 [2020-10-15 16:44:29,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:29,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:29,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:29,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304395153] [2020-10-15 16:44:29,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:29,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:29,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:29,205 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 16:44:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:29,883 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 16:44:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:29,884 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:29,884 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:29,884 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:29,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 16:44:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:29,887 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 16:44:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:29,887 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:29,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:29,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:29,888 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:30,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:44:30,088 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 16:44:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:30,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786868725] [2020-10-15 16:44:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:30,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786868725] [2020-10-15 16:44:30,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840185928] [2020-10-15 16:44:30,276 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 [2020-10-15 16:44:30,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:30,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:30,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:30,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:30,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444581861] [2020-10-15 16:44:30,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:30,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:30,359 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 16:44:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:31,213 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 16:44:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:31,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:31,214 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:31,214 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:31,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 16:44:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:31,216 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 16:44:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:31,216 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:31,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:31,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:31,217 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:31,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 16:44:31,417 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:31,418 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 16:44:31,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515165555] [2020-10-15 16:44:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:31,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515165555] [2020-10-15 16:44:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529745627] [2020-10-15 16:44:31,599 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 [2020-10-15 16:44:31,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:31,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:31,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:31,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:31,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918841882] [2020-10-15 16:44:31,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:31,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:31,675 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 16:44:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:32,520 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 16:44:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:32,520 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:32,521 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:44:32,521 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:44:32,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:44:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 16:44:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:44:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 16:44:32,523 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 16:44:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:32,524 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 16:44:32,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 16:44:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:32,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:32,524 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:32,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:32,725 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 16:44:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:32,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979413912] [2020-10-15 16:44:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979413912] [2020-10-15 16:44:32,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969060140] [2020-10-15 16:44:32,887 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 [2020-10-15 16:44:32,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:32,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:32,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:32,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:32,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306854281] [2020-10-15 16:44:32,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:32,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:32,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:32,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:32,981 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 16:44:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:33,917 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 16:44:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:33,918 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:33,919 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:33,919 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:44:33,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:44:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 16:44:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:44:33,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 16:44:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:33,921 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:44:33,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:44:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:33,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:33,921 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:34,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:44:34,122 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:34,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:34,123 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 16:44:34,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:34,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742020265] [2020-10-15 16:44:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:34,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742020265] [2020-10-15 16:44:34,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802239196] [2020-10-15 16:44:34,302 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 [2020-10-15 16:44:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:34,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:34,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:34,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796042332] [2020-10-15 16:44:34,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:34,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:34,368 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 16:44:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:35,165 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 16:44:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:35,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:35,167 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:44:35,167 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:44:35,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:44:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 16:44:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 16:44:35,170 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 16:44:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:35,171 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 16:44:35,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 16:44:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:35,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:35,171 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:35,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:35,382 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:35,382 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 16:44:35,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:35,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126236502] [2020-10-15 16:44:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:35,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126236502] [2020-10-15 16:44:35,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612311873] [2020-10-15 16:44:35,564 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 [2020-10-15 16:44:35,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:35,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:35,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:35,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:35,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:35,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96956456] [2020-10-15 16:44:35,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:35,650 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 16:44:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:36,616 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 16:44:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:36,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:36,617 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:36,617 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:36,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 16:44:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:44:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 16:44:36,620 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 16:44:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:36,620 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 16:44:36,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 16:44:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:36,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:36,621 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:36,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:36,821 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 16:44:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:36,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602515877] [2020-10-15 16:44:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602515877] [2020-10-15 16:44:37,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002544547] [2020-10-15 16:44:37,085 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 [2020-10-15 16:44:37,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:37,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:37,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306359837] [2020-10-15 16:44:37,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:37,148 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 16:44:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:37,605 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 16:44:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:37,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:37,606 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:37,606 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:37,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 16:44:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:37,610 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:37,610 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:37,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:37,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:37,611 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:37,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:37,814 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 16:44:37,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:37,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836503137] [2020-10-15 16:44:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836503137] [2020-10-15 16:44:38,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199719720] [2020-10-15 16:44:38,087 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 [2020-10-15 16:44:38,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:38,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:38,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:38,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:38,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:38,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:38,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711640783] [2020-10-15 16:44:38,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:38,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:38,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:38,171 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:38,699 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:44:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:38,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:38,701 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:44:38,701 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:44:38,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:44:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 16:44:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:38,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:38,703 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:38,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:38,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:38,704 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:38,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:38,904 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 16:44:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:38,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795989807] [2020-10-15 16:44:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:39,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795989807] [2020-10-15 16:44:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72743794] [2020-10-15 16:44:39,151 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 [2020-10-15 16:44:39,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:39,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:39,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:39,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:39,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:39,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563374393] [2020-10-15 16:44:39,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:39,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:39,212 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:39,715 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:44:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:39,716 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:39,717 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:44:39,717 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:44:39,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:44:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 16:44:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:39,719 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:39,720 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:39,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:39,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:39,720 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:39,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:39,921 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:39,921 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 16:44:39,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:39,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596744839] [2020-10-15 16:44:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596744839] [2020-10-15 16:44:40,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324974173] [2020-10-15 16:44:40,160 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 [2020-10-15 16:44:40,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:40,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:40,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:40,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889700019] [2020-10-15 16:44:40,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:40,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:40,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:40,247 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:40,893 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 16:44:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:40,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:40,895 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:40,895 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:40,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:40,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 16:44:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:40,897 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:40,898 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:40,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:40,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:40,898 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:41,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:44:41,099 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 16:44:41,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:41,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615045688] [2020-10-15 16:44:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615045688] [2020-10-15 16:44:41,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894521691] [2020-10-15 16:44:41,340 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 [2020-10-15 16:44:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:41,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:41,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:41,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094325261] [2020-10-15 16:44:41,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:41,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:41,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:41,401 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:41,968 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 16:44:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:41,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:41,969 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:41,969 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:41,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 16:44:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:41,972 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:41,972 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:41,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:41,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:41,973 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:42,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:44:42,175 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:42,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 16:44:42,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:42,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764932876] [2020-10-15 16:44:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:42,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764932876] [2020-10-15 16:44:42,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010469083] [2020-10-15 16:44:42,408 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 [2020-10-15 16:44:42,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:42,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:42,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:42,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:42,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266587709] [2020-10-15 16:44:42,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:42,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:42,491 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:43,218 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 16:44:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:43,219 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:43,219 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:43,219 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:43,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 16:44:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:43,222 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:43,222 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:43,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:43,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:43,223 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:43,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:44:43,431 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 16:44:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:43,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308827278] [2020-10-15 16:44:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308827278] [2020-10-15 16:44:43,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530871283] [2020-10-15 16:44:43,651 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 [2020-10-15 16:44:43,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:43,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:43,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:43,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650322654] [2020-10-15 16:44:43,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:43,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:43,726 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:44,358 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 16:44:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:44,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:44,359 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:44,359 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:44,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 16:44:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:44,361 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:44,362 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:44,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:44,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:44,362 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:44,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:44:44,563 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 16:44:44,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:44,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782797151] [2020-10-15 16:44:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782797151] [2020-10-15 16:44:44,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289608817] [2020-10-15 16:44:44,792 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 [2020-10-15 16:44:44,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:44,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:44,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:44,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:44,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876648328] [2020-10-15 16:44:44,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:44,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:44,878 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:45,676 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 16:44:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:45,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:45,677 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:45,677 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:45,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 16:44:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:45,680 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:45,680 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:45,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:45,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:45,681 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:45,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:45,882 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 16:44:45,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:45,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908163178] [2020-10-15 16:44:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:46,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908163178] [2020-10-15 16:44:46,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587344688] [2020-10-15 16:44:46,094 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 [2020-10-15 16:44:46,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:46,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:46,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:46,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341464016] [2020-10-15 16:44:46,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:46,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:46,159 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:46,858 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 16:44:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:46,859 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:46,860 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:44:46,860 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:44:46,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:44:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 16:44:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:46,862 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:46,862 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:46,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:46,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:46,863 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:47,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 16:44:47,063 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 16:44:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:47,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881561273] [2020-10-15 16:44:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881561273] [2020-10-15 16:44:47,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505309417] [2020-10-15 16:44:47,259 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 [2020-10-15 16:44:47,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:47,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:47,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:47,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:47,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728451558] [2020-10-15 16:44:47,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:47,351 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:48,260 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 16:44:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:48,260 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:48,261 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:44:48,261 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:44:48,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:44:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 16:44:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:48,263 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:48,264 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:48,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:48,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:48,264 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:48,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:48,465 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 16:44:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:48,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131334669] [2020-10-15 16:44:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:48,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131334669] [2020-10-15 16:44:48,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931903865] [2020-10-15 16:44:48,661 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 [2020-10-15 16:44:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:48,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:48,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:48,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:48,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439321407] [2020-10-15 16:44:48,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:48,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:48,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:48,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:48,735 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:49,517 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 16:44:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:49,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:49,518 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:44:49,519 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:44:49,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:44:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 16:44:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:49,520 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:49,520 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:49,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:49,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:49,521 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:49,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:49,721 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:49,722 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 16:44:49,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:49,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448538173] [2020-10-15 16:44:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:49,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448538173] [2020-10-15 16:44:49,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465240796] [2020-10-15 16:44:49,932 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 [2020-10-15 16:44:49,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:49,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:49,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:50,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:50,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821891220] [2020-10-15 16:44:50,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:50,018 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:51,000 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:44:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:51,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:51,002 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:44:51,002 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:44:51,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:44:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 16:44:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:51,005 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:51,005 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:51,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:51,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:51,006 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:51,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 16:44:51,207 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 16:44:51,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:51,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430570506] [2020-10-15 16:44:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430570506] [2020-10-15 16:44:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322861705] [2020-10-15 16:44:51,407 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 [2020-10-15 16:44:51,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:51,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:51,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:51,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:51,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167135656] [2020-10-15 16:44:51,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:51,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:51,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:51,484 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:52,299 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 16:44:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:52,299 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:52,300 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:44:52,300 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:44:52,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:44:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 16:44:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:52,303 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:52,303 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:52,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:52,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:52,304 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:52,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:52,505 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 16:44:52,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:52,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094216010] [2020-10-15 16:44:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094216010] [2020-10-15 16:44:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859533575] [2020-10-15 16:44:52,707 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 [2020-10-15 16:44:52,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:52,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:52,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:52,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:52,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:52,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869709605] [2020-10-15 16:44:52,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:52,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:52,794 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:53,881 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 16:44:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:53,881 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:53,882 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:44:53,882 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:44:53,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:44:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 16:44:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:53,885 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:53,885 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:53,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:53,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:53,886 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:54,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:44:54,088 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 16:44:54,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:54,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312012150] [2020-10-15 16:44:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312012150] [2020-10-15 16:44:54,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992032869] [2020-10-15 16:44:54,273 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 [2020-10-15 16:44:54,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:54,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:54,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:54,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327480800] [2020-10-15 16:44:54,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:54,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:54,346 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:55,221 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:44:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:55,221 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:55,222 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:55,222 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:55,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 16:44:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:44:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 16:44:55,224 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 16:44:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:55,225 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 16:44:55,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 16:44:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:55,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:55,225 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:55,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:44:55,433 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:55,434 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 16:44:55,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:55,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27454006] [2020-10-15 16:44:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:55,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27454006] [2020-10-15 16:44:55,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650275572] [2020-10-15 16:44:55,627 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 [2020-10-15 16:44:55,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:55,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:55,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:55,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:55,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:55,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354488932] [2020-10-15 16:44:55,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:55,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:55,723 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 16:44:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:56,688 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-10-15 16:44:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:56,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:56,689 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:44:56,689 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:44:56,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:44:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-15 16:44:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:44:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 16:44:56,692 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 16:44:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:56,692 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 16:44:56,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 16:44:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:56,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:56,692 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:56,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:44:56,893 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 16:44:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:56,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311955916] [2020-10-15 16:44:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311955916] [2020-10-15 16:44:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985756493] [2020-10-15 16:44:57,095 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 [2020-10-15 16:44:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:57,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:57,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:57,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:57,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:57,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184196114] [2020-10-15 16:44:57,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:57,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:57,190 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 16:44:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:58,240 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:44:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:58,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:58,241 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:58,241 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:58,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 16:44:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:44:58,243 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 16:44:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:58,243 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:44:58,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:44:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:58,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:58,244 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:58,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:44:58,445 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 16:44:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:58,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837475620] [2020-10-15 16:44:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:58,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837475620] [2020-10-15 16:44:58,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253399550] [2020-10-15 16:44:58,666 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 [2020-10-15 16:44:58,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:58,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:58,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:58,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:58,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:58,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:58,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559445166] [2020-10-15 16:44:58,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:58,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:58,763 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 16:44:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:59,917 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 16:44:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:59,917 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:59,918 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:44:59,918 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:44:59,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:44:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:44:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:44:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:44:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 16:44:59,920 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 16:44:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:59,920 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 16:44:59,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 16:44:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:59,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:59,921 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:00,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:00,121 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 16:45:00,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:00,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309724827] [2020-10-15 16:45:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309724827] [2020-10-15 16:45:00,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576959835] [2020-10-15 16:45:00,414 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 [2020-10-15 16:45:00,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:00,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:00,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:00,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046126798] [2020-10-15 16:45:00,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:00,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:00,477 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 16:45:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:00,924 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 16:45:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:45:00,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:00,925 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:45:00,925 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:45:00,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:45:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:45:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 16:45:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:45:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 16:45:00,928 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 16:45:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:00,928 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 16:45:00,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 16:45:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:00,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:00,928 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:01,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:01,129 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 16:45:01,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:01,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948215496] [2020-10-15 16:45:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948215496] [2020-10-15 16:45:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476717123] [2020-10-15 16:45:01,430 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 [2020-10-15 16:45:01,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:01,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:01,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:01,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:01,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384717800] [2020-10-15 16:45:01,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:01,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:01,518 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 16:45:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:02,055 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 16:45:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:45:02,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:02,056 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:45:02,056 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:45:02,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:45:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:45:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 16:45:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:45:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 16:45:02,058 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 16:45:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:02,058 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 16:45:02,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 16:45:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:02,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:02,059 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:02,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:02,260 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:02,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 16:45:02,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:02,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279257924] [2020-10-15 16:45:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:02,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279257924] [2020-10-15 16:45:02,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339413836] [2020-10-15 16:45:02,546 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 [2020-10-15 16:45:02,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:02,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:02,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:02,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:02,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856438028] [2020-10-15 16:45:02,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:02,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:02,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:02,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:02,611 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 16:45:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:03,167 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 16:45:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:45:03,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:03,169 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:45:03,169 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:45:03,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:45:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:45:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 16:45:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:45:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 16:45:03,172 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 16:45:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:03,172 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 16:45:03,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 16:45:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:03,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:03,172 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:03,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:03,373 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 16:45:03,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:03,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977929952] [2020-10-15 16:45:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:03,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977929952] [2020-10-15 16:45:03,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98572140] [2020-10-15 16:45:03,664 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 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 [2020-10-15 16:45:03,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:03,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:03,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:03,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:03,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911221711] [2020-10-15 16:45:03,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:03,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:03,753 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 16:45:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:04,368 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 16:45:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:04,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:04,370 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:45:04,370 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:45:04,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:45:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:45:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 16:45:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:45:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 16:45:04,372 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 16:45:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:04,373 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 16:45:04,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 16:45:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:04,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:04,374 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:04,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:04,580 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 16:45:04,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:04,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489148312] [2020-10-15 16:45:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489148312] [2020-10-15 16:45:04,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690798712] [2020-10-15 16:45:04,847 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 [2020-10-15 16:45:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:04,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:04,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531894403] [2020-10-15 16:45:04,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:04,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:04,909 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 16:45:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:05,504 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 16:45:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:05,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:05,505 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:45:05,505 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:45:05,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:45:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 16:45:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:45:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 16:45:05,508 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 16:45:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:05,508 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 16:45:05,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 16:45:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:05,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:05,509 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:05,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:05,710 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 16:45:05,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:05,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485129628] [2020-10-15 16:45:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485129628] [2020-10-15 16:45:05,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997507031] [2020-10-15 16:45:05,984 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 [2020-10-15 16:45:06,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:06,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:06,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:06,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:06,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:06,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:06,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593683594] [2020-10-15 16:45:06,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:06,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:06,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:06,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:06,069 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 16:45:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:06,765 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 16:45:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:06,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:06,767 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:45:06,767 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:45:06,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:06,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:45:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 16:45:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:45:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 16:45:06,770 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 16:45:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:06,770 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 16:45:06,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 16:45:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:06,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:06,771 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:06,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:06,971 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 16:45:06,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:06,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413202410] [2020-10-15 16:45:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413202410] [2020-10-15 16:45:07,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682808597] [2020-10-15 16:45:07,226 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 [2020-10-15 16:45:07,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:07,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:07,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:07,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:07,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476869820] [2020-10-15 16:45:07,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:07,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:07,293 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 16:45:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:07,982 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 16:45:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:07,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:07,983 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:07,984 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:07,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:45:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 16:45:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:45:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 16:45:07,986 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 16:45:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:07,986 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 16:45:07,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 16:45:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:07,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:07,986 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:08,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:45:08,187 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 16:45:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:08,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948448471] [2020-10-15 16:45:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:08,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948448471] [2020-10-15 16:45:08,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796534744] [2020-10-15 16:45:08,445 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 [2020-10-15 16:45:08,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:08,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:08,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:08,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:08,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630222592] [2020-10-15 16:45:08,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:08,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:08,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:08,532 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 16:45:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:09,336 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 16:45:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:09,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:09,337 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:45:09,337 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:45:09,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:45:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 16:45:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 16:45:09,339 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 16:45:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:09,340 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 16:45:09,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 16:45:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:09,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:09,340 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:09,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:45:09,541 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 16:45:09,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:09,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960499498] [2020-10-15 16:45:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960499498] [2020-10-15 16:45:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492147239] [2020-10-15 16:45:09,782 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 [2020-10-15 16:45:09,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:09,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:09,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:09,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:09,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512507049] [2020-10-15 16:45:09,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:09,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:09,871 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 16:45:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:10,681 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 16:45:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:10,683 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:10,683 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:45:10,684 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:45:10,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:45:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 16:45:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:45:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 16:45:10,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 16:45:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:10,688 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 16:45:10,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 16:45:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:10,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:10,689 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:10,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:45:10,898 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:10,899 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 16:45:10,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:10,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778858210] [2020-10-15 16:45:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:11,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778858210] [2020-10-15 16:45:11,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878969908] [2020-10-15 16:45:11,277 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 [2020-10-15 16:45:11,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:11,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:11,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:11,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795181661] [2020-10-15 16:45:11,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:11,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:11,429 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 16:45:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:12,736 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 16:45:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:12,737 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:12,738 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:45:12,738 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:45:12,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:45:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 16:45:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:45:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 16:45:12,742 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 16:45:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:12,742 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 16:45:12,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 16:45:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:12,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:12,744 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:12,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:45:12,953 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 16:45:12,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:12,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784224195] [2020-10-15 16:45:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:13,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784224195] [2020-10-15 16:45:13,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550075029] [2020-10-15 16:45:13,300 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 [2020-10-15 16:45:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:13,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:13,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621323340] [2020-10-15 16:45:13,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:13,411 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 16:45:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:14,261 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:45:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:14,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:14,263 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:14,263 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:14,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 16:45:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:45:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 16:45:14,265 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 16:45:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:14,266 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 16:45:14,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 16:45:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:14,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:14,266 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:14,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:14,467 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 16:45:14,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:14,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399152610] [2020-10-15 16:45:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:14,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399152610] [2020-10-15 16:45:14,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453808140] [2020-10-15 16:45:14,687 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 [2020-10-15 16:45:14,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:14,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:14,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:14,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:14,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197558446] [2020-10-15 16:45:14,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:14,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:14,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:14,784 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 16:45:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:15,761 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 16:45:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:15,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:15,762 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:45:15,762 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:45:15,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:45:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 16:45:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:45:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 16:45:15,764 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 16:45:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:15,765 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 16:45:15,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 16:45:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:15,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:15,765 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:15,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:15,966 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 16:45:15,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:15,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360244483] [2020-10-15 16:45:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360244483] [2020-10-15 16:45:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688286135] [2020-10-15 16:45:16,197 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 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 [2020-10-15 16:45:16,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:16,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:16,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:16,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834462466] [2020-10-15 16:45:16,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:16,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:16,268 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 16:45:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:17,139 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:45:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:17,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:17,140 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:45:17,140 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:45:17,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:45:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 16:45:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:45:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:45:17,143 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 16:45:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:17,143 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:45:17,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:45:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:17,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:17,144 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:17,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 16:45:17,344 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 16:45:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:17,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869305868] [2020-10-15 16:45:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:17,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869305868] [2020-10-15 16:45:17,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149285604] [2020-10-15 16:45:17,585 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 [2020-10-15 16:45:17,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:17,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:17,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:17,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:17,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829854629] [2020-10-15 16:45:17,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:17,684 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 16:45:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:18,845 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:45:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:18,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:18,846 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:45:18,846 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:45:18,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:45:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 16:45:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:45:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:45:18,849 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 16:45:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:18,850 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:45:18,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:45:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:18,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:18,850 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:19,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:19,051 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 16:45:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:19,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659026646] [2020-10-15 16:45:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659026646] [2020-10-15 16:45:19,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840447855] [2020-10-15 16:45:19,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:45:19,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:19,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:19,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:19,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206013319] [2020-10-15 16:45:19,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:19,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:19,354 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 16:45:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:20,292 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 16:45:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:20,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:20,294 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:20,294 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:20,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 16:45:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:45:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 16:45:20,297 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 16:45:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:20,297 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 16:45:20,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 16:45:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:20,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:20,298 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:20,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:20,499 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 16:45:20,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:20,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070533635] [2020-10-15 16:45:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:20,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070533635] [2020-10-15 16:45:20,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298696943] [2020-10-15 16:45:20,730 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 [2020-10-15 16:45:20,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:20,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:20,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:20,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:20,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853390579] [2020-10-15 16:45:20,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:20,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:20,825 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 16:45:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:22,008 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 16:45:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:22,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:22,009 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:22,009 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:45:22,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:45:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 16:45:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:45:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:45:22,012 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 16:45:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:22,012 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:45:22,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:45:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:22,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:22,013 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:22,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:22,213 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 16:45:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:22,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563528259] [2020-10-15 16:45:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:22,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563528259] [2020-10-15 16:45:22,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281496252] [2020-10-15 16:45:22,442 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 [2020-10-15 16:45:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:22,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:22,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:22,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:45:22,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996421653] [2020-10-15 16:45:22,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:45:22,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:45:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:45:22,513 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 16:45:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:23,520 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 16:45:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:23,521 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:45:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:23,522 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:45:23,522 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:45:23,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:45:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 16:45:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 16:45:23,527 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 16:45:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:23,527 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 16:45:23,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:45:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 16:45:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:45:23,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:23,528 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:23,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:23,736 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 16:45:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:23,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24553339] [2020-10-15 16:45:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:23,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24553339] [2020-10-15 16:45:23,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778651476] [2020-10-15 16:45:23,967 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 [2020-10-15 16:45:24,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:24,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:45:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:24,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:24,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:45:24,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761951983] [2020-10-15 16:45:24,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:24,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:24,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:24,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:24,059 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 16:45:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:25,290 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 16:45:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:25,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:45:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:25,292 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:45:25,292 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:45:25,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:45:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 16:45:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:45:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 16:45:25,295 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 16:45:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:25,295 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 16:45:25,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 16:45:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:25,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:25,296 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:25,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:25,496 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 16:45:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:25,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541659004] [2020-10-15 16:45:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:25,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541659004] [2020-10-15 16:45:25,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192548927] [2020-10-15 16:45:25,819 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 [2020-10-15 16:45:25,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:25,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:25,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:25,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:25,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108848945] [2020-10-15 16:45:25,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:25,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:25,883 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 16:45:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:26,433 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 16:45:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:26,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:26,435 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:26,435 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:26,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:45:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 16:45:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:26,438 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:26,438 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:26,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:26,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:26,439 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:26,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 16:45:26,639 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 16:45:26,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:26,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401779136] [2020-10-15 16:45:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401779136] [2020-10-15 16:45:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097628091] [2020-10-15 16:45:26,985 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 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 [2020-10-15 16:45:27,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:27,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:27,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:27,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:27,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:27,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522113636] [2020-10-15 16:45:27,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:27,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:27,075 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:27,696 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 16:45:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:27,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:27,698 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:45:27,698 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:45:27,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:45:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 16:45:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:27,701 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:27,702 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:27,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:27,702 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:27,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:45:27,903 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 16:45:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:27,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309469364] [2020-10-15 16:45:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309469364] [2020-10-15 16:45:28,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342310601] [2020-10-15 16:45:28,218 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 [2020-10-15 16:45:28,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:28,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:28,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152591065] [2020-10-15 16:45:28,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:28,282 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:28,920 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 16:45:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:45:28,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:28,921 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:45:28,921 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:45:28,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:45:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:45:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 16:45:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:28,924 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:28,924 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:28,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:28,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:28,925 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:29,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:29,125 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 16:45:29,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:29,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081959120] [2020-10-15 16:45:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081959120] [2020-10-15 16:45:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915803211] [2020-10-15 16:45:29,446 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 [2020-10-15 16:45:29,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:29,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:29,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:29,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:29,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:29,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:29,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152630909] [2020-10-15 16:45:29,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:29,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:29,543 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:30,318 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 16:45:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:30,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:30,320 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:30,320 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:30,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:45:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 16:45:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:30,323 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:30,323 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:30,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:30,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:30,324 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:30,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 16:45:30,525 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 16:45:30,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:30,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897731945] [2020-10-15 16:45:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897731945] [2020-10-15 16:45:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473301018] [2020-10-15 16:45:30,827 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 [2020-10-15 16:45:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:30,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:30,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:30,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895779135] [2020-10-15 16:45:30,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:30,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:30,901 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:31,628 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 16:45:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:31,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:31,630 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:45:31,630 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:45:31,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:45:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 16:45:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:31,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:31,634 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:31,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:31,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:31,634 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:31,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:31,835 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 16:45:31,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:31,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920795761] [2020-10-15 16:45:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:32,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920795761] [2020-10-15 16:45:32,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85234791] [2020-10-15 16:45:32,148 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 [2020-10-15 16:45:32,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:32,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:32,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:32,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:32,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:32,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:32,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:32,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284640965] [2020-10-15 16:45:32,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:32,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:32,236 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:33,096 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 16:45:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:33,097 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:33,097 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:33,098 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:33,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 16:45:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:33,100 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:33,100 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:33,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:33,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:33,101 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:33,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:33,301 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 16:45:33,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:33,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26094633] [2020-10-15 16:45:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26094633] [2020-10-15 16:45:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148433983] [2020-10-15 16:45:33,601 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 [2020-10-15 16:45:33,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:33,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:33,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:33,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:33,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028480425] [2020-10-15 16:45:33,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:33,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:33,674 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:34,497 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:45:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:34,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:34,499 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:45:34,499 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:45:34,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:45:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 16:45:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:34,502 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:34,502 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:34,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:34,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:34,503 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:34,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:34,703 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 16:45:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:34,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822153712] [2020-10-15 16:45:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:34,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822153712] [2020-10-15 16:45:34,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814130077] [2020-10-15 16:45:34,995 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 [2020-10-15 16:45:35,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:35,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:35,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:35,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:35,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163501723] [2020-10-15 16:45:35,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:35,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:35,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:35,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:35,104 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:36,353 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 16:45:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:36,354 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:36,355 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:36,355 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:36,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 16:45:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:36,357 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:36,358 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:36,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:36,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:36,358 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:36,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:36,565 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 16:45:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285302280] [2020-10-15 16:45:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:36,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285302280] [2020-10-15 16:45:36,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481271307] [2020-10-15 16:45:36,848 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 [2020-10-15 16:45:36,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:36,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:36,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:36,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687101617] [2020-10-15 16:45:36,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:36,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:36,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:36,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:36,924 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:37,784 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 16:45:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:37,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:37,786 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:37,786 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:45:37,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:45:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 16:45:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:37,788 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:37,788 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:37,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:37,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:37,789 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:37,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 16:45:37,990 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:37,990 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 16:45:37,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:37,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565016887] [2020-10-15 16:45:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:38,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565016887] [2020-10-15 16:45:38,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887339067] [2020-10-15 16:45:38,277 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 [2020-10-15 16:45:38,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:38,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:38,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:38,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:38,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167475673] [2020-10-15 16:45:38,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:38,385 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:39,479 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 16:45:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:39,480 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:39,481 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:45:39,481 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:45:39,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:45:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 16:45:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:39,484 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:39,484 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:39,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:39,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:39,485 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:39,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:39,693 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 16:45:39,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:39,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097686014] [2020-10-15 16:45:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:39,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097686014] [2020-10-15 16:45:39,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901280519] [2020-10-15 16:45:39,973 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 [2020-10-15 16:45:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:40,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:40,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758856031] [2020-10-15 16:45:40,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:40,044 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:41,003 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 16:45:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:41,003 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:41,004 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:45:41,004 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:45:41,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:45:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 16:45:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:41,006 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:41,006 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:41,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:41,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:41,007 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:41,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 16:45:41,208 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:41,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 16:45:41,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:41,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503675850] [2020-10-15 16:45:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:41,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503675850] [2020-10-15 16:45:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134919752] [2020-10-15 16:45:41,488 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 [2020-10-15 16:45:41,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:41,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:41,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:41,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:41,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:41,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603446593] [2020-10-15 16:45:41,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:41,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:41,587 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:42,812 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 16:45:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:42,813 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:42,813 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:45:42,814 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:45:42,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:45:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 16:45:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:42,816 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:42,816 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:42,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:42,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:42,817 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:43,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:45:43,022 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 16:45:43,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:43,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560660854] [2020-10-15 16:45:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560660854] [2020-10-15 16:45:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400540172] [2020-10-15 16:45:43,293 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 [2020-10-15 16:45:43,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:43,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:43,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:43,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637080605] [2020-10-15 16:45:43,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:43,375 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:44,417 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:45:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:44,418 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:44,419 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:45:44,419 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:45:44,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:45:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 16:45:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:44,422 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:44,422 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:44,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:44,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:44,423 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:44,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:44,625 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 16:45:44,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:44,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420239232] [2020-10-15 16:45:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:44,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420239232] [2020-10-15 16:45:44,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878337364] [2020-10-15 16:45:44,922 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 [2020-10-15 16:45:44,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:45,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:45,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:45,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310381689] [2020-10-15 16:45:45,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:45,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:45,020 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:46,354 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:45:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:46,355 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:46,355 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:45:46,356 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:45:46,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:45:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 16:45:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:46,358 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:46,359 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:46,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:46,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:46,359 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:46,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:46,567 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 16:45:46,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:46,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511006533] [2020-10-15 16:45:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:46,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511006533] [2020-10-15 16:45:46,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101170952] [2020-10-15 16:45:46,837 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 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 [2020-10-15 16:45:46,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:46,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:46,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:46,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450059139] [2020-10-15 16:45:46,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:46,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:46,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:46,915 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:48,052 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 16:45:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:48,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:48,054 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:45:48,054 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:45:48,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:45:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 16:45:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:48,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:48,057 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:48,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:48,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:48,057 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:48,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:48,258 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:48,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 16:45:48,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:48,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431167088] [2020-10-15 16:45:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431167088] [2020-10-15 16:45:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206431706] [2020-10-15 16:45:48,535 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 [2020-10-15 16:45:48,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:48,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:48,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:48,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:48,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:48,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097601641] [2020-10-15 16:45:48,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:48,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:48,645 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:50,150 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 16:45:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:50,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:50,152 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:45:50,152 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:45:50,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:45:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:45:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 16:45:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:50,156 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:50,156 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:50,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:50,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:50,157 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:50,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 16:45:50,364 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 16:45:50,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:50,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285379425] [2020-10-15 16:45:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:50,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285379425] [2020-10-15 16:45:50,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762830919] [2020-10-15 16:45:50,649 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 [2020-10-15 16:45:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:50,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:50,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:50,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:50,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:50,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582788811] [2020-10-15 16:45:50,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:50,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:50,729 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:51,962 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 16:45:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:51,963 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:51,964 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:51,964 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:51,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 16:45:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:45:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 16:45:51,967 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 16:45:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:51,967 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 16:45:51,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 16:45:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:51,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:51,967 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:52,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:52,168 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:52,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 16:45:52,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:52,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791671814] [2020-10-15 16:45:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:52,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791671814] [2020-10-15 16:45:52,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412411860] [2020-10-15 16:45:52,444 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 [2020-10-15 16:45:52,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:52,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:52,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:52,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:52,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:52,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780913279] [2020-10-15 16:45:52,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:52,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:52,548 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 16:45:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:54,066 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 16:45:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:45:54,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:54,067 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:45:54,067 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:45:54,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:45:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 16:45:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:45:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 16:45:54,069 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 16:45:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:54,069 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 16:45:54,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 16:45:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:54,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:54,069 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:54,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:54,270 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 16:45:54,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:54,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664051167] [2020-10-15 16:45:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664051167] [2020-10-15 16:45:54,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885479642] [2020-10-15 16:45:54,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:45:54,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:54,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:54,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:54,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:54,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:54,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:54,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101761292] [2020-10-15 16:45:54,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:54,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:54,666 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 16:45:56,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:56,133 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 16:45:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:56,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:56,135 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:56,135 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:45:56,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:45:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 16:45:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:45:56,137 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 16:45:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:56,137 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:45:56,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:45:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:56,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:56,137 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:56,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:56,338 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:56,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:56,338 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 16:45:56,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:56,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622530231] [2020-10-15 16:45:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:56,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622530231] [2020-10-15 16:45:56,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584162584] [2020-10-15 16:45:56,649 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 [2020-10-15 16:45:56,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:56,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:56,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:56,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:56,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:56,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563915122] [2020-10-15 16:45:56,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:56,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:56,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:56,766 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 16:45:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:58,352 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 16:45:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:58,353 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:58,354 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:45:58,354 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:45:58,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:45:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:45:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 16:45:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:45:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 16:45:58,357 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 16:45:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:58,358 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 16:45:58,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 16:45:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:58,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:58,358 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:58,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:58,565 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 16:45:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:58,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030458688] [2020-10-15 16:45:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:58,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030458688] [2020-10-15 16:45:58,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587687859] [2020-10-15 16:45:58,985 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 [2020-10-15 16:45:59,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:59,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:59,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:59,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:59,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355485692] [2020-10-15 16:45:59,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:59,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:59,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:59,051 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 16:45:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:59,727 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 16:45:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:59,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:59,729 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:45:59,729 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:45:59,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:45:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:45:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 16:45:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 16:45:59,732 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 16:45:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:59,732 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 16:45:59,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 16:45:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:59,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:59,733 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:59,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 16:45:59,933 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:59,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 16:45:59,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:59,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944633985] [2020-10-15 16:45:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:00,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944633985] [2020-10-15 16:46:00,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019978992] [2020-10-15 16:46:00,355 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 [2020-10-15 16:46:00,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:00,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:00,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:00,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:00,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:00,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956665880] [2020-10-15 16:46:00,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:00,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:00,453 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 16:46:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:01,194 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 16:46:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:46:01,195 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:01,195 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:46:01,196 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:46:01,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:46:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:46:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 16:46:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:46:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 16:46:01,198 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 16:46:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:01,198 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 16:46:01,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 16:46:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:01,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:01,199 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:01,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:46:01,400 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 16:46:01,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:01,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394569703] [2020-10-15 16:46:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394569703] [2020-10-15 16:46:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049653622] [2020-10-15 16:46:01,816 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 [2020-10-15 16:46:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:01,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:01,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360274476] [2020-10-15 16:46:01,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:01,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:01,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:01,882 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 16:46:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:02,693 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 16:46:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:46:02,694 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:02,695 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:46:02,695 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:46:02,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:46:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:46:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 16:46:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:46:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 16:46:02,697 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 16:46:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:02,697 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 16:46:02,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 16:46:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:02,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:02,698 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:02,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:46:02,898 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 16:46:02,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:02,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369916242] [2020-10-15 16:46:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:03,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369916242] [2020-10-15 16:46:03,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092163670] [2020-10-15 16:46:03,325 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 [2020-10-15 16:46:03,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:03,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:03,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:03,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:03,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:03,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257145886] [2020-10-15 16:46:03,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:03,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:03,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:03,424 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 16:46:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:04,285 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 16:46:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:46:04,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:04,286 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:46:04,286 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:46:04,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:46:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:46:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 16:46:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:46:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 16:46:04,290 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 16:46:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:04,290 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 16:46:04,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 16:46:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:04,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:04,290 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:04,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:46:04,498 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 16:46:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:04,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101224524] [2020-10-15 16:46:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101224524] [2020-10-15 16:46:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639665536] [2020-10-15 16:46:04,897 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 [2020-10-15 16:46:04,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:04,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:04,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342400091] [2020-10-15 16:46:04,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:04,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:04,973 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 16:46:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:05,836 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 16:46:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:46:05,837 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:05,837 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:46:05,838 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:46:05,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:46:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:46:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 16:46:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:46:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 16:46:05,840 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 16:46:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:05,840 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 16:46:05,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 16:46:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:05,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:05,841 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:06,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:06,042 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 16:46:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:06,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867381686] [2020-10-15 16:46:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:06,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867381686] [2020-10-15 16:46:06,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371636880] [2020-10-15 16:46:06,444 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 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 [2020-10-15 16:46:06,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:06,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:06,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:06,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:06,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:06,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746814891] [2020-10-15 16:46:06,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:06,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:06,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:06,543 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 16:46:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:07,546 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 16:46:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:46:07,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:07,547 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:46:07,547 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:46:07,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:46:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:46:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 16:46:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:46:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 16:46:07,550 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 16:46:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:07,550 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 16:46:07,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 16:46:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:07,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:07,551 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:07,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:46:07,752 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 16:46:07,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:07,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252426552] [2020-10-15 16:46:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:08,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252426552] [2020-10-15 16:46:08,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988718821] [2020-10-15 16:46:08,144 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 [2020-10-15 16:46:08,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:08,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:08,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924812538] [2020-10-15 16:46:08,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:08,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:08,219 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 16:46:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:09,209 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 16:46:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:46:09,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:09,210 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:46:09,210 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:46:09,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:46:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:46:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 16:46:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:46:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 16:46:09,213 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 16:46:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:09,214 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 16:46:09,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 16:46:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:09,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:09,214 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:09,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:09,415 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 16:46:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:09,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607591307] [2020-10-15 16:46:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:09,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607591307] [2020-10-15 16:46:09,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216519870] [2020-10-15 16:46:09,805 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 [2020-10-15 16:46:09,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:09,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:09,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:09,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:09,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348288612] [2020-10-15 16:46:09,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:09,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:09,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:09,919 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 16:46:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:11,091 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 16:46:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:46:11,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:11,093 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:46:11,093 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:46:11,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:46:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:46:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 16:46:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:46:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 16:46:11,097 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 16:46:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:11,097 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 16:46:11,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 16:46:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:11,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:11,098 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:11,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 16:46:11,301 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 16:46:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:11,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020540495] [2020-10-15 16:46:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:11,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020540495] [2020-10-15 16:46:11,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873845863] [2020-10-15 16:46:11,678 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 [2020-10-15 16:46:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:11,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:11,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:11,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658545999] [2020-10-15 16:46:11,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:11,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:11,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:11,760 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 16:46:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:12,838 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 16:46:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:46:12,839 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:12,840 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:46:12,840 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:46:12,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:46:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:46:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 16:46:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:46:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 16:46:12,842 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 16:46:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:12,843 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 16:46:12,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 16:46:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:12,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:12,843 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:13,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:13,044 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:13,045 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 16:46:13,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:13,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955409069] [2020-10-15 16:46:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:13,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955409069] [2020-10-15 16:46:13,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562885258] [2020-10-15 16:46:13,422 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 [2020-10-15 16:46:13,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:13,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:13,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:13,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:13,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:13,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:13,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539494702] [2020-10-15 16:46:13,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:13,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:13,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:13,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:13,530 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 16:46:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:14,788 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 16:46:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:46:14,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:14,790 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:46:14,790 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:46:14,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:46:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:46:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 16:46:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:46:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 16:46:14,792 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 16:46:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:14,793 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 16:46:14,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 16:46:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:14,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:14,793 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:14,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:14,994 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 16:46:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059248284] [2020-10-15 16:46:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:15,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059248284] [2020-10-15 16:46:15,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104247015] [2020-10-15 16:46:15,361 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 [2020-10-15 16:46:15,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:15,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:15,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110134088] [2020-10-15 16:46:15,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:15,448 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 16:46:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:16,607 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 16:46:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:46:16,608 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:16,608 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:46:16,608 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:46:16,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:46:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:46:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 16:46:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:46:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 16:46:16,610 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 16:46:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:16,611 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 16:46:16,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 16:46:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:16,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:16,611 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:16,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:16,812 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 16:46:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:16,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254287784] [2020-10-15 16:46:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:17,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254287784] [2020-10-15 16:46:17,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728394003] [2020-10-15 16:46:17,173 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 [2020-10-15 16:46:17,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:17,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:17,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:17,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348561126] [2020-10-15 16:46:17,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:17,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:17,288 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 16:46:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:18,685 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 16:46:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:46:18,686 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:18,686 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:46:18,686 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:46:18,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:46:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:46:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 16:46:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:46:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 16:46:18,689 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 16:46:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:18,689 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 16:46:18,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 16:46:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:18,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:18,690 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:18,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:18,892 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:18,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 16:46:18,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:18,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015751356] [2020-10-15 16:46:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015751356] [2020-10-15 16:46:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451827092] [2020-10-15 16:46:19,259 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 [2020-10-15 16:46:19,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:19,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:19,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:19,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:19,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591804277] [2020-10-15 16:46:19,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:19,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:19,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:19,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:19,343 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 16:46:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:20,636 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 16:46:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:46:20,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:20,637 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:46:20,638 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:46:20,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:46:20,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:46:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 16:46:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:46:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 16:46:20,640 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 16:46:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:20,640 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 16:46:20,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 16:46:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:20,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:20,641 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:20,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:46:20,842 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:20,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 16:46:20,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:20,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925352185] [2020-10-15 16:46:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925352185] [2020-10-15 16:46:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142289225] [2020-10-15 16:46:21,217 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 [2020-10-15 16:46:21,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:21,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:21,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:21,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:21,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530758903] [2020-10-15 16:46:21,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:21,334 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 16:46:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:22,894 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 16:46:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:46:22,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:22,895 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:46:22,895 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:46:22,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:46:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:46:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 16:46:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:46:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 16:46:22,898 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 16:46:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:22,898 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 16:46:22,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 16:46:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:22,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:22,898 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:23,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 16:46:23,099 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 16:46:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:23,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510458958] [2020-10-15 16:46:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:23,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510458958] [2020-10-15 16:46:23,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895181052] [2020-10-15 16:46:23,458 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 [2020-10-15 16:46:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:23,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:23,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:23,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:23,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764550962] [2020-10-15 16:46:23,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:23,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:23,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:23,538 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 16:46:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:24,934 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 16:46:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:46:24,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:24,936 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:46:24,936 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:46:24,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:46:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:46:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 16:46:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:46:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:46:24,938 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 16:46:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:24,939 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:46:24,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:46:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:24,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:24,939 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:25,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:46:25,140 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 16:46:25,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:25,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124297913] [2020-10-15 16:46:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:25,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124297913] [2020-10-15 16:46:25,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941766917] [2020-10-15 16:46:25,506 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 [2020-10-15 16:46:25,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:25,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:25,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:25,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:25,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:25,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588649741] [2020-10-15 16:46:25,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:25,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:25,621 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 16:46:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:27,374 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 16:46:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:46:27,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:27,376 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:46:27,376 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:46:27,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:46:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:46:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 16:46:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:46:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:46:27,379 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 16:46:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:27,379 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:46:27,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:46:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:27,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:27,379 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:27,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:46:27,580 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 16:46:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:27,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856053850] [2020-10-15 16:46:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:27,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856053850] [2020-10-15 16:46:27,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998013815] [2020-10-15 16:46:27,949 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 [2020-10-15 16:46:28,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:28,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:28,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:28,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:28,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486540135] [2020-10-15 16:46:28,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:28,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:28,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:28,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:28,039 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 16:46:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:29,544 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 16:46:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:46:29,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:29,546 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:46:29,546 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:46:29,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:46:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:46:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 16:46:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:46:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 16:46:29,549 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 16:46:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:29,549 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 16:46:29,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 16:46:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:29,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:29,550 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:29,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:29,750 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 16:46:29,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880737633] [2020-10-15 16:46:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:30,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880737633] [2020-10-15 16:46:30,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400106985] [2020-10-15 16:46:30,131 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 [2020-10-15 16:46:30,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:30,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:30,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:30,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:30,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:30,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524894878] [2020-10-15 16:46:30,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:30,245 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 16:46:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:32,021 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 16:46:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:46:32,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:32,023 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:46:32,023 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:46:32,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:46:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:46:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 16:46:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:46:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:46:32,026 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 16:46:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:32,026 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:46:32,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:46:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:32,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:32,027 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:32,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:46:32,228 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 16:46:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:32,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081051469] [2020-10-15 16:46:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:32,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081051469] [2020-10-15 16:46:32,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746343570] [2020-10-15 16:46:32,610 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 [2020-10-15 16:46:32,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:32,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:32,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:32,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:32,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835365549] [2020-10-15 16:46:32,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:32,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:32,702 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 16:46:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:34,193 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 16:46:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:46:34,194 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:34,195 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:46:34,195 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:46:34,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:46:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:46:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 16:46:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:46:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 16:46:34,199 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 16:46:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:34,199 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 16:46:34,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 16:46:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:34,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:34,200 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:34,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:34,409 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 16:46:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:34,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991602640] [2020-10-15 16:46:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:34,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991602640] [2020-10-15 16:46:34,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130098154] [2020-10-15 16:46:34,783 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 [2020-10-15 16:46:34,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:34,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:34,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:34,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:34,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:34,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106822393] [2020-10-15 16:46:34,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:34,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:34,907 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 16:46:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:36,847 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 16:46:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:36,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:36,849 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:36,849 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:46:36,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:46:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:46:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 16:46:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:46:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 16:46:36,852 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 16:46:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:36,852 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 16:46:36,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 16:46:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:36,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:36,852 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:37,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 16:46:37,053 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:37,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 16:46:37,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:37,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709115700] [2020-10-15 16:46:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:37,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709115700] [2020-10-15 16:46:37,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594967063] [2020-10-15 16:46:37,591 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 [2020-10-15 16:46:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:37,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:37,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:37,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796373864] [2020-10-15 16:46:37,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:37,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:37,662 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-15 16:46:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:38,576 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-15 16:46:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:46:38,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:38,579 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:46:38,579 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:46:38,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:46:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:46:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-15 16:46:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:38,581 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:38,581 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:38,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:38,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:38,582 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:38,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:38,783 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-15 16:46:38,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:38,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914464017] [2020-10-15 16:46:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:39,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914464017] [2020-10-15 16:46:39,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013889775] [2020-10-15 16:46:39,329 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 [2020-10-15 16:46:39,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:39,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:39,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:39,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:39,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:39,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:39,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378239291] [2020-10-15 16:46:39,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:39,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:39,437 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:40,487 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-15 16:46:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:46:40,488 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:40,489 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:46:40,489 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:46:40,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:46:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:46:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-15 16:46:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:40,493 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:40,493 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:40,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:40,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:40,494 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:40,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-15 16:46:40,703 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-15 16:46:40,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:40,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461860533] [2020-10-15 16:46:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:41,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461860533] [2020-10-15 16:46:41,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408329198] [2020-10-15 16:46:41,209 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 [2020-10-15 16:46:41,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:41,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:41,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:41,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151045531] [2020-10-15 16:46:41,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:41,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:41,287 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:42,331 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-15 16:46:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:46:42,333 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:42,334 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:46:42,334 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:46:42,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:46:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:46:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-15 16:46:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:42,337 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:42,337 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:42,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:42,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:42,337 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:42,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:42,538 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-15 16:46:42,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:42,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357561247] [2020-10-15 16:46:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357561247] [2020-10-15 16:46:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515188076] [2020-10-15 16:46:43,077 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 [2020-10-15 16:46:43,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:43,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:43,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:43,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:43,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:43,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:43,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:43,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349305380] [2020-10-15 16:46:43,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:43,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:43,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:43,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:43,191 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:44,406 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 16:46:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:46:44,408 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:44,408 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:46:44,409 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:46:44,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:46:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:46:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-15 16:46:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:44,411 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:44,411 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:44,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:44,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:44,412 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:44,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-15 16:46:44,612 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-15 16:46:44,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:44,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048214144] [2020-10-15 16:46:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:45,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048214144] [2020-10-15 16:46:45,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621491156] [2020-10-15 16:46:45,112 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 [2020-10-15 16:46:45,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:45,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:45,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786951899] [2020-10-15 16:46:45,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:45,193 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:46,322 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 16:46:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:46:46,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:46,325 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:46:46,325 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:46:46,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:46:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:46:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-15 16:46:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:46,328 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:46,329 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:46,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:46,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:46,329 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:46,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:46:46,537 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:46,538 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-15 16:46:46,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:46,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799426378] [2020-10-15 16:46:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799426378] [2020-10-15 16:46:47,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326871778] [2020-10-15 16:46:47,052 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 [2020-10-15 16:46:47,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:47,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:47,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:47,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:47,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725982066] [2020-10-15 16:46:47,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:47,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:47,173 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:48,557 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-15 16:46:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:46:48,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:48,560 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:46:48,560 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:46:48,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:46:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:46:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-15 16:46:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:48,562 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:48,562 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:48,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:48,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:48,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:48,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:46:48,764 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-15 16:46:48,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:48,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548869453] [2020-10-15 16:46:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:49,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548869453] [2020-10-15 16:46:49,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747529122] [2020-10-15 16:46:49,253 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 [2020-10-15 16:46:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:49,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:49,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:49,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:49,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500466814] [2020-10-15 16:46:49,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:49,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:49,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:49,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:49,338 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:50,586 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-15 16:46:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:46:50,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:50,588 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:46:50,589 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:46:50,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:46:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:46:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-15 16:46:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:50,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:50,592 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:50,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:50,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:50,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:50,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:50,796 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-15 16:46:50,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:50,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841190534] [2020-10-15 16:46:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:51,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841190534] [2020-10-15 16:46:51,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567787292] [2020-10-15 16:46:51,326 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 [2020-10-15 16:46:51,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:46:51,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:51,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:51,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:51,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:51,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:51,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532381064] [2020-10-15 16:46:51,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:51,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:51,444 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:52,998 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-15 16:46:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:46:53,000 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:53,001 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:46:53,001 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:46:53,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:46:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:46:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-15 16:46:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:53,004 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:53,004 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:53,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:53,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:53,005 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:53,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:46:53,206 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-15 16:46:53,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:53,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288961203] [2020-10-15 16:46:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:53,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288961203] [2020-10-15 16:46:53,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445663027] [2020-10-15 16:46:53,706 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 [2020-10-15 16:46:53,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:46:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:53,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:53,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:53,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392584271] [2020-10-15 16:46:53,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:53,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:53,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:53,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:53,794 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:46:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:55,173 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-15 16:46:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:46:55,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:46:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:55,176 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:46:55,176 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:46:55,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:46:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:46:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-15 16:46:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:46:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:46:55,179 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:46:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:55,179 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:46:55,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:46:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:55,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:55,179 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:55,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:55,380 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-15 16:46:55,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:55,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960120071] [2020-10-15 16:46:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960120071] [2020-10-15 16:46:55,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754507072] [2020-10-15 16:46:55,857 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 [2020-10-15 16:46:55,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:46:55,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:55,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:55,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:55,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:46:55,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422316761] [2020-10-15 16:46:55,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:46:55,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:46:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:46:55,988 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:46:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:57,716 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-15 16:46:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:46:57,718 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:46:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:57,718 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:57,718 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:46:57,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:46:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:46:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-15 16:46:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:46:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:46:57,721 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:46:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:57,721 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:46:57,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:46:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:46:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:57,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:57,721 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:57,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-15 16:46:57,924 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-15 16:46:57,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:57,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596925502] [2020-10-15 16:46:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:58,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596925502] [2020-10-15 16:46:58,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505632428] [2020-10-15 16:46:58,373 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 [2020-10-15 16:46:58,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:58,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:58,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:46:58,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:58,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:58,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:46:58,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556005539] [2020-10-15 16:46:58,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:58,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:58,462 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:47:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:00,014 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-15 16:47:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:47:00,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:47:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:00,015 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:47:00,016 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:47:00,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:47:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:47:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-15 16:47:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:47:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:47:00,019 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:47:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:00,020 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:47:00,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:47:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:47:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:00,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:00,020 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:00,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:00,225 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-15 16:47:00,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:00,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736665792] [2020-10-15 16:47:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:00,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736665792] [2020-10-15 16:47:00,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876644954] [2020-10-15 16:47:00,712 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 [2020-10-15 16:47:00,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:47:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:00,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:00,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:00,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:00,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916629268] [2020-10-15 16:47:00,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:00,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:00,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:00,848 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:47:02,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:02,747 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-15 16:47:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:47:02,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:02,749 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:47:02,749 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:47:02,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:47:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:47:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-15 16:47:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:47:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:47:02,752 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:47:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:02,752 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:47:02,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:47:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:02,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:02,753 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:02,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-15 16:47:02,957 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-15 16:47:02,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:02,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130378808] [2020-10-15 16:47:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:03,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130378808] [2020-10-15 16:47:03,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310425096] [2020-10-15 16:47:03,422 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 [2020-10-15 16:47:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:03,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:03,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:03,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:47:03,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128910209] [2020-10-15 16:47:03,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:47:03,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:47:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:47:03,506 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:47:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:05,186 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-15 16:47:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:47:05,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:47:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:05,189 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:47:05,189 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:47:05,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:47:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:47:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-15 16:47:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:47:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:47:05,191 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:47:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:05,192 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:47:05,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:47:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:47:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:05,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:05,192 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:05,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:05,393 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-15 16:47:05,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:05,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744510275] [2020-10-15 16:47:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:05,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744510275] [2020-10-15 16:47:05,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386065047] [2020-10-15 16:47:05,860 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 [2020-10-15 16:47:05,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:05,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:05,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:05,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:05,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:05,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654189425] [2020-10-15 16:47:05,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:05,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:05,992 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:47:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:08,125 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-15 16:47:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:47:08,127 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:08,127 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:47:08,127 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:47:08,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:47:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:47:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-15 16:47:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:47:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:47:08,130 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:47:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:08,130 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:47:08,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:47:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:08,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:08,131 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:08,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:08,340 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-15 16:47:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:08,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093005499] [2020-10-15 16:47:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093005499] [2020-10-15 16:47:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555158104] [2020-10-15 16:47:08,826 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 [2020-10-15 16:47:08,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:47:08,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:08,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:08,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:47:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095936070] [2020-10-15 16:47:08,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:47:08,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:08,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:47:08,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:47:08,923 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:47:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:10,724 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-15 16:47:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:47:10,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:47:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:10,726 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:47:10,726 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:47:10,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:47:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:47:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-15 16:47:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:47:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:47:10,729 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:47:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:10,729 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:47:10,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:47:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:47:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:10,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:10,730 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:10,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:47:10,931 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-15 16:47:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:10,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235147301] [2020-10-15 16:47:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:11,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235147301] [2020-10-15 16:47:11,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333351803] [2020-10-15 16:47:11,417 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 [2020-10-15 16:47:11,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:11,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:11,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:11,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:11,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:11,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969228435] [2020-10-15 16:47:11,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:11,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:11,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:11,545 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:47:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:13,804 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:47:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:47:13,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:13,805 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:47:13,805 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:47:13,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:47:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:47:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-15 16:47:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:47:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:47:13,808 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:47:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:13,808 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:47:13,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:47:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:13,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:13,809 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:14,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:47:14,010 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:14,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-15 16:47:14,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:14,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014309017] [2020-10-15 16:47:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014309017] [2020-10-15 16:47:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127633187] [2020-10-15 16:47:14,497 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 [2020-10-15 16:47:14,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:47:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:14,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:14,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:47:14,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956352239] [2020-10-15 16:47:14,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:47:14,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:47:14,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:47:14,598 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:47:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:16,602 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-15 16:47:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:47:16,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:47:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:16,603 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:47:16,604 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:47:16,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:47:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:47:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-15 16:47:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:47:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:47:16,606 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 16:47:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:16,606 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:47:16,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:47:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:47:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:16,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:16,606 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:16,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:47:16,807 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-15 16:47:16,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:16,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699535505] [2020-10-15 16:47:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699535505] [2020-10-15 16:47:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248471464] [2020-10-15 16:47:17,265 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 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 [2020-10-15 16:47:17,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:47:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:17,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:17,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:17,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366748314] [2020-10-15 16:47:17,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:17,411 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 16:47:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:19,878 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-15 16:47:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:47:19,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:19,881 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:47:19,881 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:47:19,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:47:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:47:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 16:47:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:47:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:47:19,883 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 16:47:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:19,883 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:47:19,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:47:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:19,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:19,884 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:20,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:47:20,084 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-15 16:47:20,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:20,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174877381] [2020-10-15 16:47:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:20,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174877381] [2020-10-15 16:47:20,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18262490] [2020-10-15 16:47:20,592 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 [2020-10-15 16:47:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:20,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:20,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:20,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 16:47:20,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491137050] [2020-10-15 16:47:20,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:47:20,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:47:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:47:20,689 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 16:47:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:22,798 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 16:47:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:47:22,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 16:47:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:22,800 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:47:22,801 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:47:22,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:47:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:47:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-15 16:47:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:47:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-15 16:47:22,804 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-15 16:47:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:22,804 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-15 16:47:22,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:47:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-15 16:47:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:22,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:22,804 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:23,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:47:23,005 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-15 16:47:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518351886] [2020-10-15 16:47:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518351886] [2020-10-15 16:47:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291684995] [2020-10-15 16:47:23,508 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 [2020-10-15 16:47:23,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:23,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:23,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:23,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:23,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:23,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681071295] [2020-10-15 16:47:23,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:23,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:23,645 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-15 16:47:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:26,184 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-10-15 16:47:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:47:26,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:26,186 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:47:26,186 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:47:26,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:47:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:47:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 16:47:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:47:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-15 16:47:26,189 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-15 16:47:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:26,189 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-15 16:47:26,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-15 16:47:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:47:26,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:26,190 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:26,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:26,390 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-15 16:47:26,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:26,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134991582] [2020-10-15 16:47:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:26,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134991582] [2020-10-15 16:47:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774517979] [2020-10-15 16:47:26,886 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 [2020-10-15 16:47:26,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:47:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 16:47:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:26,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:47:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:27,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:27,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 16:47:27,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346964619] [2020-10-15 16:47:27,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:27,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:27,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:27,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:27,041 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-15 16:47:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:29,524 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 16:47:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:47:29,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 16:47:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:29,526 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:47:29,527 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:47:29,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:47:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:47:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-15 16:47:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:47:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 16:47:29,530 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-15 16:47:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:29,530 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 16:47:29,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 16:47:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:29,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:29,530 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:29,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:47:29,731 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-15 16:47:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:29,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339344877] [2020-10-15 16:47:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:30,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339344877] [2020-10-15 16:47:30,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428340829] [2020-10-15 16:47:30,283 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 [2020-10-15 16:47:30,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:30,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:30,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:47:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:30,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:30,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:30,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321977617] [2020-10-15 16:47:30,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:30,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:30,436 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-10-15 16:47:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:33,094 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-10-15 16:47:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:47:33,104 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:33,104 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:47:33,104 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:47:33,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:47:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:47:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-15 16:47:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:47:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-15 16:47:33,107 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-10-15 16:47:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:33,108 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-15 16:47:33,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-15 16:47:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:33,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:33,108 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:33,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:33,315 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-15 16:47:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:33,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710925789] [2020-10-15 16:47:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710925789] [2020-10-15 16:47:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184502794] [2020-10-15 16:47:34,202 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 [2020-10-15 16:47:34,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:34,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:34,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:34,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:34,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251221439] [2020-10-15 16:47:34,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:34,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:34,279 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-10-15 16:47:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:35,428 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-10-15 16:47:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:47:35,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:35,430 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:47:35,430 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:47:35,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:47:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:47:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-15 16:47:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:47:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-15 16:47:35,433 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-10-15 16:47:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:35,434 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-15 16:47:35,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-15 16:47:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:35,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:35,434 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:35,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:35,640 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-10-15 16:47:35,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:35,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475415999] [2020-10-15 16:47:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:36,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475415999] [2020-10-15 16:47:36,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158223306] [2020-10-15 16:47:36,371 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 [2020-10-15 16:47:36,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:36,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:36,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:36,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:36,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205017548] [2020-10-15 16:47:36,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:36,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:36,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:36,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:36,502 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-10-15 16:47:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:37,795 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-10-15 16:47:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:47:37,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:37,798 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:47:37,798 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:47:37,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:47:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:47:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-10-15 16:47:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:47:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-10-15 16:47:37,801 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-10-15 16:47:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:37,801 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-10-15 16:47:37,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-10-15 16:47:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:37,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:37,802 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:38,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:38,002 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-10-15 16:47:38,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:38,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485890282] [2020-10-15 16:47:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:38,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485890282] [2020-10-15 16:47:38,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472713019] [2020-10-15 16:47:38,714 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 [2020-10-15 16:47:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:38,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:38,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:38,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:38,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106223575] [2020-10-15 16:47:38,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:38,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:38,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:38,791 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-10-15 16:47:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:40,102 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-10-15 16:47:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:47:40,104 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:40,105 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:47:40,105 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:47:40,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:47:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:47:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-10-15 16:47:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:47:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-10-15 16:47:40,107 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-10-15 16:47:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:40,107 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-10-15 16:47:40,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-10-15 16:47:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:40,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:40,108 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:40,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:40,309 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-10-15 16:47:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:40,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743418903] [2020-10-15 16:47:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743418903] [2020-10-15 16:47:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157707029] [2020-10-15 16:47:41,026 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 [2020-10-15 16:47:41,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:41,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:41,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:41,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:41,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:41,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966115625] [2020-10-15 16:47:41,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:41,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:41,151 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-10-15 16:47:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:42,544 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-10-15 16:47:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:47:42,546 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:42,547 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:47:42,547 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:47:42,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:47:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:47:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-10-15 16:47:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:47:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-10-15 16:47:42,549 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-10-15 16:47:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:42,549 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-10-15 16:47:42,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-10-15 16:47:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:42,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:42,550 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:42,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:47:42,751 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-10-15 16:47:42,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:42,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519156063] [2020-10-15 16:47:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:43,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519156063] [2020-10-15 16:47:43,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820404500] [2020-10-15 16:47:43,446 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 [2020-10-15 16:47:43,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:47:43,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:43,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:43,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000845462] [2020-10-15 16:47:43,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:43,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:43,529 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-10-15 16:47:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:45,030 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-10-15 16:47:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:47:45,032 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:45,033 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:47:45,033 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:47:45,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:47:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:47:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-10-15 16:47:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:47:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-10-15 16:47:45,036 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-10-15 16:47:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:45,036 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-10-15 16:47:45,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-10-15 16:47:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:45,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:45,037 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:45,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-10-15 16:47:45,238 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-10-15 16:47:45,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:45,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142610394] [2020-10-15 16:47:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:45,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142610394] [2020-10-15 16:47:45,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4236204] [2020-10-15 16:47:45,938 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 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 [2020-10-15 16:47:45,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:47:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:46,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:46,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:46,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:46,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505991816] [2020-10-15 16:47:46,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:46,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:46,066 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-10-15 16:47:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:47,680 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 16:47:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:47:47,683 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:47,684 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:47:47,684 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:47:47,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:47:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:47:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-10-15 16:47:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:47:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-10-15 16:47:47,687 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-10-15 16:47:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:47,688 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-10-15 16:47:47,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-10-15 16:47:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:47,688 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:47,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:47:47,898 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-10-15 16:47:47,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:47,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462015919] [2020-10-15 16:47:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:48,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462015919] [2020-10-15 16:47:48,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411993160] [2020-10-15 16:47:48,546 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 [2020-10-15 16:47:48,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:47:48,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:48,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:48,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:48,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:48,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594791007] [2020-10-15 16:47:48,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:48,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:48,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:48,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:48,632 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-10-15 16:47:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:50,252 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 16:47:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:47:50,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:50,255 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:47:50,255 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:47:50,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:47:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:47:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-10-15 16:47:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:47:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-10-15 16:47:50,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-10-15 16:47:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:50,258 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-10-15 16:47:50,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-10-15 16:47:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:50,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:50,259 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:50,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:47:50,459 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:50,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-10-15 16:47:50,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:50,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981472598] [2020-10-15 16:47:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:51,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981472598] [2020-10-15 16:47:51,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669312494] [2020-10-15 16:47:51,154 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 [2020-10-15 16:47:51,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:47:51,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:51,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:51,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:51,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:51,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919035882] [2020-10-15 16:47:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:51,310 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-10-15 16:47:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:53,111 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-10-15 16:47:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:47:53,113 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:53,113 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:47:53,114 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:47:53,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:47:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:47:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-10-15 16:47:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:47:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-10-15 16:47:53,116 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-10-15 16:47:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:53,116 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-10-15 16:47:53,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-10-15 16:47:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:53,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:53,116 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:53,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:53,317 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-10-15 16:47:53,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:53,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98570996] [2020-10-15 16:47:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:53,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98570996] [2020-10-15 16:47:53,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388491220] [2020-10-15 16:47:53,991 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 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 [2020-10-15 16:47:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:54,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:54,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:54,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:54,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243517054] [2020-10-15 16:47:54,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:54,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:54,081 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-10-15 16:47:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:55,797 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-10-15 16:47:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:47:55,802 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:47:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:55,803 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:47:55,803 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:47:55,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:47:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:47:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-10-15 16:47:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:47:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-10-15 16:47:55,805 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-10-15 16:47:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:55,805 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-10-15 16:47:55,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:47:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-10-15 16:47:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:55,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:55,806 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:56,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-10-15 16:47:56,007 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-10-15 16:47:56,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:56,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608517974] [2020-10-15 16:47:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:56,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608517974] [2020-10-15 16:47:56,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5004575] [2020-10-15 16:47:56,677 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 [2020-10-15 16:47:56,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:47:56,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:56,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:56,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:47:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:56,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:56,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:47:56,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840616996] [2020-10-15 16:47:56,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:47:56,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:47:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:47:56,820 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-10-15 16:47:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:47:58,801 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-10-15 16:47:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:47:58,804 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:47:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:47:58,805 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:47:58,805 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:47:58,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:47:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:47:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-15 16:47:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:47:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-10-15 16:47:58,808 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-10-15 16:47:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:47:58,808 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-10-15 16:47:58,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:47:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-10-15 16:47:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:47:58,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:47:58,809 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:47:59,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:47:59,009 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:47:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:47:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-10-15 16:47:59,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:47:59,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418474841] [2020-10-15 16:47:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:47:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:47:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418474841] [2020-10-15 16:47:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251451330] [2020-10-15 16:47:59,629 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 [2020-10-15 16:47:59,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:47:59,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:47:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:47:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:47:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:47:59,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:47:59,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:47:59,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306097182] [2020-10-15 16:47:59,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:47:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:47:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:47:59,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:47:59,742 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-10-15 16:48:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:01,657 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-10-15 16:48:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:48:01,659 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:48:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:01,659 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:48:01,659 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:48:01,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:48:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:48:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-10-15 16:48:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:48:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-10-15 16:48:01,662 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-10-15 16:48:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:01,663 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-10-15 16:48:01,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:48:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-10-15 16:48:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:01,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:01,663 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:01,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:01,864 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-10-15 16:48:01,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:01,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183098702] [2020-10-15 16:48:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:02,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183098702] [2020-10-15 16:48:02,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846697065] [2020-10-15 16:48:02,492 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 [2020-10-15 16:48:02,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:02,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:02,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:02,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:48:02,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256828529] [2020-10-15 16:48:02,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:02,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:02,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:02,649 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-10-15 16:48:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:04,816 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-10-15 16:48:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:48:04,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:48:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:04,820 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:48:04,820 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:48:04,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:48:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:48:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-10-15 16:48:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:48:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-10-15 16:48:04,823 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-10-15 16:48:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:04,823 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-10-15 16:48:04,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-10-15 16:48:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:04,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:04,823 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:05,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:05,024 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-10-15 16:48:05,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:05,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939478500] [2020-10-15 16:48:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939478500] [2020-10-15 16:48:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508614614] [2020-10-15 16:48:05,657 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 [2020-10-15 16:48:05,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:48:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:05,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:05,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:48:05,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865093433] [2020-10-15 16:48:05,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:48:05,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:48:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:48:05,760 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-10-15 16:48:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:07,746 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-10-15 16:48:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:48:07,747 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:48:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:07,748 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:48:07,748 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:48:07,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:48:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:48:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-10-15 16:48:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:48:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-15 16:48:07,751 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-10-15 16:48:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:07,751 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-15 16:48:07,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:48:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-15 16:48:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:07,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:07,752 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:07,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:07,953 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-10-15 16:48:07,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:07,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210096278] [2020-10-15 16:48:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:08,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210096278] [2020-10-15 16:48:08,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838261325] [2020-10-15 16:48:08,595 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 [2020-10-15 16:48:08,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:48:08,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:08,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:08,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:08,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:08,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:48:08,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640640148] [2020-10-15 16:48:08,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:08,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:08,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:08,743 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-10-15 16:48:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:11,154 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-10-15 16:48:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:48:11,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:48:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:11,155 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:48:11,155 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:48:11,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:48:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:48:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-10-15 16:48:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:48:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-15 16:48:11,159 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-10-15 16:48:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:11,160 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-15 16:48:11,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-15 16:48:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:11,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:11,161 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:11,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:11,365 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-10-15 16:48:11,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:11,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837609548] [2020-10-15 16:48:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:12,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837609548] [2020-10-15 16:48:12,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202706784] [2020-10-15 16:48:12,011 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 [2020-10-15 16:48:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:12,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:12,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:12,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:48:12,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043691324] [2020-10-15 16:48:12,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:48:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:48:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:48:12,113 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-10-15 16:48:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:14,258 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-10-15 16:48:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:48:14,260 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:48:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:14,261 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:48:14,261 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:48:14,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:48:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:48:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-10-15 16:48:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:48:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-10-15 16:48:14,265 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-10-15 16:48:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:14,265 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-10-15 16:48:14,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:48:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-10-15 16:48:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:14,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:14,266 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:14,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-10-15 16:48:14,472 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-10-15 16:48:14,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:14,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048860601] [2020-10-15 16:48:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:15,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048860601] [2020-10-15 16:48:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658232986] [2020-10-15 16:48:15,082 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 [2020-10-15 16:48:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:15,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:15,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:15,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:48:15,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742358842] [2020-10-15 16:48:15,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:15,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:15,228 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-10-15 16:48:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:17,829 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-10-15 16:48:17,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:48:17,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:48:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:17,831 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:48:17,832 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:48:17,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:48:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:48:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-15 16:48:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:48:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-15 16:48:17,835 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-10-15 16:48:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:17,836 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-15 16:48:17,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-15 16:48:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:17,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:17,837 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:18,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:48:18,044 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-10-15 16:48:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:18,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144910131] [2020-10-15 16:48:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144910131] [2020-10-15 16:48:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284235873] [2020-10-15 16:48:18,623 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 [2020-10-15 16:48:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:48:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:18,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:18,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:48:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759413937] [2020-10-15 16:48:18,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:48:18,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:18,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:48:18,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:48:18,740 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-10-15 16:48:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:21,002 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 16:48:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:48:21,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:48:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:21,005 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:48:21,005 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:48:21,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:48:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:48:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-15 16:48:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:48:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 16:48:21,008 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-10-15 16:48:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:21,008 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 16:48:21,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:48:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 16:48:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:21,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:21,009 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:21,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:48:21,210 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-10-15 16:48:21,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:21,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765611820] [2020-10-15 16:48:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:21,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765611820] [2020-10-15 16:48:21,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791412917] [2020-10-15 16:48:21,869 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 [2020-10-15 16:48:21,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:21,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:48:22,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229070285] [2020-10-15 16:48:22,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:22,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:22,032 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-10-15 16:48:24,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:24,882 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 16:48:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:48:24,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:48:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:24,886 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:48:24,886 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:48:24,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:48:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:48:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-10-15 16:48:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:48:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 16:48:24,889 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-10-15 16:48:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:24,889 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 16:48:24,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 16:48:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:24,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:24,890 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:25,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:25,091 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:25,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-10-15 16:48:25,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:25,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294705626] [2020-10-15 16:48:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:25,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294705626] [2020-10-15 16:48:25,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704873077] [2020-10-15 16:48:25,735 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 [2020-10-15 16:48:25,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:48:25,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:25,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:25,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:25,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:48:25,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836865936] [2020-10-15 16:48:25,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:48:25,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:48:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:48:25,849 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-10-15 16:48:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:28,358 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-10-15 16:48:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:48:28,360 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:48:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:28,360 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:48:28,360 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:48:28,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:48:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:48:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-10-15 16:48:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:48:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-15 16:48:28,364 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-10-15 16:48:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:28,364 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-15 16:48:28,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:48:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-15 16:48:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:28,365 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:28,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 16:48:28,566 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-10-15 16:48:28,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:28,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898870199] [2020-10-15 16:48:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898870199] [2020-10-15 16:48:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776095686] [2020-10-15 16:48:29,229 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 [2020-10-15 16:48:29,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:48:29,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:29,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:29,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:29,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:48:29,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184518120] [2020-10-15 16:48:29,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:29,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:29,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:29,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:29,391 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-15 16:48:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:32,523 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-10-15 16:48:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:48:32,525 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:48:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:32,525 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:48:32,526 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:48:32,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:48:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:48:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-10-15 16:48:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:48:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 16:48:32,529 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-10-15 16:48:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:32,529 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 16:48:32,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 16:48:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:32,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:32,529 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:32,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:32,730 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-10-15 16:48:32,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:32,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659096627] [2020-10-15 16:48:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:33,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659096627] [2020-10-15 16:48:33,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847923639] [2020-10-15 16:48:33,351 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 [2020-10-15 16:48:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:33,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:33,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 16:48:33,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772120474] [2020-10-15 16:48:33,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 16:48:33,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 16:48:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:48:33,478 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-10-15 16:48:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:36,142 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 16:48:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:48:36,144 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 16:48:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:36,145 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:48:36,145 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:48:36,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:48:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:48:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-10-15 16:48:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:48:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-10-15 16:48:36,149 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-10-15 16:48:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:36,149 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-10-15 16:48:36,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 16:48:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-10-15 16:48:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 16:48:36,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:36,150 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:36,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-10-15 16:48:36,353 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-10-15 16:48:36,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:36,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525310872] [2020-10-15 16:48:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:37,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525310872] [2020-10-15 16:48:37,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716397060] [2020-10-15 16:48:37,009 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 [2020-10-15 16:48:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 16:48:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:37,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:37,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:37,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 16:48:37,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356860359] [2020-10-15 16:48:37,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:37,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:37,160 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-10-15 16:48:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:40,304 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-10-15 16:48:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:48:40,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 16:48:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:40,306 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:48:40,306 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:48:40,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:48:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:48:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-10-15 16:48:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:48:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-15 16:48:40,310 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-15 16:48:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:40,310 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-15 16:48:40,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-15 16:48:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:40,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:40,311 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:40,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:40,526 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-10-15 16:48:40,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:40,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938432745] [2020-10-15 16:48:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:41,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938432745] [2020-10-15 16:48:41,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100734121] [2020-10-15 16:48:41,475 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 [2020-10-15 16:48:41,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:48:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:41,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:41,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:41,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123362668] [2020-10-15 16:48:41,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:41,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:41,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:41,573 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-15 16:48:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:43,036 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 16:48:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:48:43,039 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:43,039 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:48:43,039 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:48:43,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:48:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:48:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-10-15 16:48:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:43,043 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:43,043 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:43,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:43,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:43,043 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:43,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:43,246 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-10-15 16:48:43,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:43,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980523866] [2020-10-15 16:48:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:44,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980523866] [2020-10-15 16:48:44,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085036476] [2020-10-15 16:48:44,137 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 [2020-10-15 16:48:44,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:48:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:44,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:44,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:44,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:44,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286669397] [2020-10-15 16:48:44,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:44,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:44,273 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:46,000 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-10-15 16:48:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:48:46,003 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:46,003 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:48:46,004 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:48:46,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:48:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:48:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-10-15 16:48:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:46,007 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:46,007 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:46,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:46,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:46,008 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:46,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:46,209 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-10-15 16:48:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:46,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68223417] [2020-10-15 16:48:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:47,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68223417] [2020-10-15 16:48:47,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094717660] [2020-10-15 16:48:47,079 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 [2020-10-15 16:48:47,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:48:47,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:47,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:47,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:47,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724867074] [2020-10-15 16:48:47,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:47,169 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:48,878 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:48:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:48:48,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:48,881 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:48:48,881 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:48:48,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:48:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:48:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-15 16:48:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:48,884 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:48,884 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:48,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:48,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:48,885 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:49,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:49,086 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-10-15 16:48:49,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:49,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996653845] [2020-10-15 16:48:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:49,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996653845] [2020-10-15 16:48:49,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248685237] [2020-10-15 16:48:49,983 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 [2020-10-15 16:48:50,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:48:50,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:50,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:50,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:50,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:50,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671876436] [2020-10-15 16:48:50,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:50,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:50,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:50,129 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:52,080 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-10-15 16:48:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:48:52,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:52,083 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:48:52,083 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:48:52,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:48:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:48:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-15 16:48:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:52,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:52,087 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:52,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:52,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:52,088 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:52,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:48:52,289 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-10-15 16:48:52,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:52,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243076512] [2020-10-15 16:48:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243076512] [2020-10-15 16:48:53,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248052135] [2020-10-15 16:48:53,133 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 [2020-10-15 16:48:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:53,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100024576] [2020-10-15 16:48:53,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:53,225 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:48:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:55,023 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-15 16:48:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:48:55,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:48:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:55,026 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:48:55,026 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:48:55,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:48:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:48:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-10-15 16:48:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:48:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:48:55,029 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:48:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:55,030 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:48:55,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:48:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:48:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:55,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:55,030 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:55,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-10-15 16:48:55,231 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-10-15 16:48:55,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:55,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103074759] [2020-10-15 16:48:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103074759] [2020-10-15 16:48:56,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443191671] [2020-10-15 16:48:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:48:56,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:48:56,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:56,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:48:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:56,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:56,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:48:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851570867] [2020-10-15 16:48:56,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:48:56,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:56,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:48:56,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:48:56,226 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:48:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:48:58,366 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-15 16:48:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:48:58,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:48:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:48:58,370 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:48:58,370 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:48:58,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:48:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:48:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-15 16:48:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:48:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:48:58,373 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:48:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:48:58,373 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:48:58,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:48:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:48:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:48:58,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:48:58,373 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:48:58,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 16:48:58,574 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:48:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:48:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-10-15 16:48:58,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:48:58,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252807929] [2020-10-15 16:48:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:48:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:48:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252807929] [2020-10-15 16:48:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346364692] [2020-10-15 16:48:59,393 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 [2020-10-15 16:48:59,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:48:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:48:59,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:48:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:48:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:48:59,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:48:59,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:48:59,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396386161] [2020-10-15 16:48:59,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:48:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:48:59,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:48:59,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:48:59,492 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:01,480 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-10-15 16:49:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:49:01,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:01,483 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:49:01,483 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:49:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:49:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:49:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-15 16:49:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:01,486 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:01,487 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:01,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:01,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:01,487 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:01,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-10-15 16:49:01,688 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-10-15 16:49:01,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:01,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466311499] [2020-10-15 16:49:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466311499] [2020-10-15 16:49:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91129764] [2020-10-15 16:49:02,509 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 [2020-10-15 16:49:02,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:49:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:02,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:02,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:02,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153482341] [2020-10-15 16:49:02,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:02,646 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:05,069 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-10-15 16:49:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:49:05,070 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:05,070 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:49:05,071 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:49:05,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:49:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:49:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-10-15 16:49:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:05,074 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:05,074 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:05,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:05,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:05,075 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:05,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 16:49:05,276 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-10-15 16:49:05,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:05,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722654301] [2020-10-15 16:49:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:06,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722654301] [2020-10-15 16:49:06,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685314673] [2020-10-15 16:49:06,067 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 [2020-10-15 16:49:06,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:49:06,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:06,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:06,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087745453] [2020-10-15 16:49:06,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:06,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:06,166 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:08,358 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 16:49:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:49:08,360 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:08,361 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:49:08,361 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:49:08,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:49:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:49:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-10-15 16:49:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:08,364 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:08,364 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:08,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:08,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:08,365 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:08,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:08,566 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-10-15 16:49:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:08,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966623211] [2020-10-15 16:49:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:09,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966623211] [2020-10-15 16:49:09,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224881155] [2020-10-15 16:49:09,357 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 [2020-10-15 16:49:09,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:49:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:09,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:09,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:09,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:09,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:09,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550333568] [2020-10-15 16:49:09,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:09,520 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:11,613 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-10-15 16:49:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:49:11,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:11,616 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:49:11,616 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:49:11,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:49:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:49:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-10-15 16:49:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:11,618 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:11,618 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:11,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:11,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:11,619 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:11,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-10-15 16:49:11,820 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-10-15 16:49:11,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:11,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819819898] [2020-10-15 16:49:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:12,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819819898] [2020-10-15 16:49:12,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603322731] [2020-10-15 16:49:12,545 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 [2020-10-15 16:49:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:12,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:12,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106676436] [2020-10-15 16:49:12,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:12,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:12,645 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:14,893 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-10-15 16:49:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:49:14,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:14,897 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:49:14,897 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:49:14,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:49:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:49:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-15 16:49:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:14,900 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:14,901 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:14,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:14,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:14,901 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:15,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:15,102 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-10-15 16:49:15,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:15,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012430335] [2020-10-15 16:49:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012430335] [2020-10-15 16:49:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503575991] [2020-10-15 16:49:15,876 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 [2020-10-15 16:49:15,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:49:15,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:15,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:15,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:16,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:16,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:16,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91451163] [2020-10-15 16:49:16,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:16,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:16,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:16,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:16,030 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:18,686 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-10-15 16:49:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:49:18,688 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:18,688 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:49:18,689 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:49:18,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:49:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:49:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-15 16:49:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:18,692 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:18,692 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:18,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:18,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:18,692 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:18,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:18,893 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-10-15 16:49:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:18,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959165826] [2020-10-15 16:49:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:19,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959165826] [2020-10-15 16:49:19,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591866713] [2020-10-15 16:49:19,650 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 [2020-10-15 16:49:19,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:49:19,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:19,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:19,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:19,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647435284] [2020-10-15 16:49:19,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:19,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:19,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:19,756 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:22,219 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-15 16:49:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:49:22,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:22,222 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:49:22,223 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:49:22,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:49:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:49:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-15 16:49:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:22,226 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:22,226 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:22,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:22,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:22,227 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:22,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:22,429 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-10-15 16:49:22,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:22,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493584119] [2020-10-15 16:49:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:23,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493584119] [2020-10-15 16:49:23,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428234748] [2020-10-15 16:49:23,193 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 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 [2020-10-15 16:49:23,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:49:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:23,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:23,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:23,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895638278] [2020-10-15 16:49:23,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:23,354 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:26,401 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-10-15 16:49:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:49:26,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:26,405 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:49:26,405 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:49:26,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:49:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:49:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-15 16:49:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:26,408 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:26,409 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:26,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:26,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:26,409 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:26,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:26,610 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-10-15 16:49:26,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:26,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307180683] [2020-10-15 16:49:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:27,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307180683] [2020-10-15 16:49:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714827010] [2020-10-15 16:49:27,348 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 [2020-10-15 16:49:27,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:49:27,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:27,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:27,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718793635] [2020-10-15 16:49:27,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:27,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:27,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:27,456 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:30,103 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 16:49:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:49:30,106 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:30,106 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:49:30,106 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:49:30,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:49:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:49:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-10-15 16:49:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:30,109 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:30,109 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:30,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:30,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:30,110 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:30,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-10-15 16:49:30,311 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-10-15 16:49:30,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:30,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111420895] [2020-10-15 16:49:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:31,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111420895] [2020-10-15 16:49:31,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706432190] [2020-10-15 16:49:31,056 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 [2020-10-15 16:49:31,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:49:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:31,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:31,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:31,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:31,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:31,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187016777] [2020-10-15 16:49:31,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:31,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:31,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:31,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:31,229 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:34,315 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-10-15 16:49:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:49:34,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:34,318 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:49:34,319 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:49:34,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:49:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:49:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:49:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:34,321 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:34,321 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:34,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:34,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:34,321 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:34,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 16:49:34,522 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-10-15 16:49:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:34,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844197717] [2020-10-15 16:49:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:35,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844197717] [2020-10-15 16:49:35,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66083654] [2020-10-15 16:49:35,268 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 [2020-10-15 16:49:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:35,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:35,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:35,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:35,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511191215] [2020-10-15 16:49:35,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:35,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:35,377 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:38,220 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-10-15 16:49:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:49:38,223 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:38,223 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:49:38,224 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:49:38,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:49:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:49:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-15 16:49:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:38,226 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:38,227 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:38,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:38,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:38,227 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:38,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-10-15 16:49:38,428 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:38,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-10-15 16:49:38,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:38,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740013145] [2020-10-15 16:49:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740013145] [2020-10-15 16:49:39,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099546875] [2020-10-15 16:49:39,185 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 [2020-10-15 16:49:39,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:49:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:39,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:39,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:39,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:39,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41684521] [2020-10-15 16:49:39,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:39,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:39,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:39,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:39,343 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:42,934 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 16:49:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:49:42,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:42,938 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:49:42,938 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:49:42,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:49:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:49:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-15 16:49:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:42,941 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:42,941 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:42,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:42,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:42,941 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:43,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 16:49:43,142 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-10-15 16:49:43,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:43,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37254159] [2020-10-15 16:49:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37254159] [2020-10-15 16:49:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585505583] [2020-10-15 16:49:43,917 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 [2020-10-15 16:49:43,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 16:49:43,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:43,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:43,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:44,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:44,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:44,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980912682] [2020-10-15 16:49:44,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:44,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:44,042 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:47,124 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-10-15 16:49:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:49:47,127 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:47,128 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:49:47,128 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:49:47,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:49:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:49:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-15 16:49:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:49:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:49:47,131 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 16:49:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:47,131 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:49:47,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:49:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:47,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:47,132 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:47,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:47,333 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-10-15 16:49:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:47,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102343160] [2020-10-15 16:49:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:48,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102343160] [2020-10-15 16:49:48,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291140770] [2020-10-15 16:49:48,082 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 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 [2020-10-15 16:49:48,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:49:48,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:48,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:48,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:48,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799516881] [2020-10-15 16:49:48,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:48,246 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 16:49:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:52,070 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-10-15 16:49:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:49:52,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:49:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:52,074 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:49:52,074 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:49:52,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:49:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:49:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-15 16:49:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:49:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:49:52,077 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 16:49:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:52,078 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:49:52,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:49:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:49:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:52,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:52,078 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:52,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-10-15 16:49:52,279 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-10-15 16:49:52,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:52,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693354127] [2020-10-15 16:49:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:53,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693354127] [2020-10-15 16:49:53,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295126778] [2020-10-15 16:49:53,092 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 [2020-10-15 16:49:53,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 16:49:53,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:53,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:53,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 16:49:53,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252254741] [2020-10-15 16:49:53,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 16:49:53,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 16:49:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:49:53,224 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 16:49:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:49:56,524 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 16:49:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:49:56,527 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 16:49:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:49:56,527 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:49:56,527 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:49:56,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:49:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:49:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-15 16:49:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:49:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-10-15 16:49:56,530 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-10-15 16:49:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:49:56,530 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-10-15 16:49:56,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 16:49:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-10-15 16:49:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:49:56,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:49:56,531 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:49:56,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:49:56,739 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:49:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:49:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-10-15 16:49:56,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:49:56,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734873530] [2020-10-15 16:49:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:49:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:49:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:57,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734873530] [2020-10-15 16:49:57,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568343242] [2020-10-15 16:49:57,558 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 [2020-10-15 16:49:57,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 16:49:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:49:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:49:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:49:57,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:49:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:49:57,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:49:57,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:49:57,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059653941] [2020-10-15 16:49:57,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:49:57,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:49:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:49:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:49:57,744 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-10-15 16:50:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:01,770 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-10-15 16:50:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:50:01,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:50:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:01,773 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:50:01,774 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:50:01,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:50:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:50:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-10-15 16:50:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:50:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-10-15 16:50:01,776 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-10-15 16:50:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:01,777 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-10-15 16:50:01,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-10-15 16:50:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 16:50:01,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:01,778 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:01,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:01,979 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-10-15 16:50:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260412553] [2020-10-15 16:50:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:02,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260412553] [2020-10-15 16:50:02,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016632348] [2020-10-15 16:50:02,791 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 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 [2020-10-15 16:50:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:02,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 16:50:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:02,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:50:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:02,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:02,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 16:50:02,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780578884] [2020-10-15 16:50:02,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:02,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:02,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:02,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:02,974 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-10-15 16:50:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:06,756 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-10-15 16:50:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:50:06,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 16:50:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:06,759 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:50:06,759 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:50:06,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:50:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:50:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-15 16:50:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:50:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 16:50:06,762 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-10-15 16:50:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:06,762 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 16:50:06,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 16:50:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:06,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:06,763 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:06,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:06,964 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-10-15 16:50:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:06,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339943878] [2020-10-15 16:50:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:07,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339943878] [2020-10-15 16:50:07,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477873418] [2020-10-15 16:50:07,838 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 [2020-10-15 16:50:07,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:50:07,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:07,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:07,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:50:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:08,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:08,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:08,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292976305] [2020-10-15 16:50:08,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:08,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:08,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:08,030 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-10-15 16:50:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:12,137 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-10-15 16:50:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:50:12,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:12,141 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:50:12,142 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:50:12,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:50:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:50:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-10-15 16:50:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:50:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-15 16:50:12,145 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-10-15 16:50:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:12,145 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-15 16:50:12,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-15 16:50:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:12,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:12,146 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:12,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:12,347 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-10-15 16:50:12,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:12,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190375581] [2020-10-15 16:50:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:13,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190375581] [2020-10-15 16:50:13,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772432616] [2020-10-15 16:50:13,428 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 [2020-10-15 16:50:13,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:50:13,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:13,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:13,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:13,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777558676] [2020-10-15 16:50:13,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:13,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:13,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:13,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:13,517 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-10-15 16:50:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:15,318 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-10-15 16:50:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:50:15,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:50:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:15,322 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:50:15,322 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:50:15,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:50:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:50:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-15 16:50:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:50:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-10-15 16:50:15,324 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-10-15 16:50:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:15,325 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-10-15 16:50:15,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-10-15 16:50:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:15,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:15,325 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:15,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:15,526 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-10-15 16:50:15,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:15,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757714817] [2020-10-15 16:50:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757714817] [2020-10-15 16:50:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617526054] [2020-10-15 16:50:16,654 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 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 [2020-10-15 16:50:16,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:50:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:16,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:16,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:16,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:16,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566542917] [2020-10-15 16:50:16,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:16,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:16,806 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-10-15 16:50:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:18,886 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-10-15 16:50:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:50:18,889 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:18,890 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:50:18,890 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:50:18,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:50:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:50:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-10-15 16:50:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:50:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-10-15 16:50:18,893 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-10-15 16:50:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:18,893 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-10-15 16:50:18,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-10-15 16:50:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:18,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:18,894 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:19,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 16:50:19,095 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-10-15 16:50:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:19,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781651214] [2020-10-15 16:50:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781651214] [2020-10-15 16:50:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892939339] [2020-10-15 16:50:20,178 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 [2020-10-15 16:50:20,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:50:20,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376053817] [2020-10-15 16:50:20,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:20,285 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-10-15 16:50:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:22,252 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-10-15 16:50:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:50:22,253 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:50:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:22,254 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:50:22,254 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:50:22,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:50:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:50:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-10-15 16:50:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:50:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-10-15 16:50:22,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-10-15 16:50:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:22,257 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-10-15 16:50:22,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-10-15 16:50:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:22,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:22,257 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:22,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 16:50:22,458 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-10-15 16:50:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:22,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582132951] [2020-10-15 16:50:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:23,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582132951] [2020-10-15 16:50:23,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753891765] [2020-10-15 16:50:23,570 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 [2020-10-15 16:50:23,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:50:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:23,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:23,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:23,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:23,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89656772] [2020-10-15 16:50:23,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:23,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:23,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:23,746 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-10-15 16:50:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:26,007 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-10-15 16:50:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:50:26,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:26,011 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:50:26,011 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:50:26,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:50:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:50:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-15 16:50:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:50:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-10-15 16:50:26,014 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-10-15 16:50:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:26,014 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-10-15 16:50:26,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-10-15 16:50:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:26,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:26,014 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:26,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 16:50:26,215 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:26,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-10-15 16:50:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:26,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469703252] [2020-10-15 16:50:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:27,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469703252] [2020-10-15 16:50:27,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020927923] [2020-10-15 16:50:27,288 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 [2020-10-15 16:50:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:27,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:27,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690743910] [2020-10-15 16:50:27,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:27,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:27,386 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-10-15 16:50:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:29,690 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-10-15 16:50:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:50:29,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:50:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:29,695 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:50:29,695 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:50:29,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:50:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:50:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-10-15 16:50:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:50:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-10-15 16:50:29,698 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-10-15 16:50:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-10-15 16:50:29,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-10-15 16:50:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:29,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:29,699 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:29,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:29,900 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:29,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-10-15 16:50:29,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:29,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764779122] [2020-10-15 16:50:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:30,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764779122] [2020-10-15 16:50:30,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846900520] [2020-10-15 16:50:30,952 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 [2020-10-15 16:50:31,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:50:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:31,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:31,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:31,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:31,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588456107] [2020-10-15 16:50:31,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:31,111 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-10-15 16:50:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:33,505 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-10-15 16:50:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:50:33,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:33,514 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:50:33,514 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:50:33,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:50:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:50:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-10-15 16:50:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:50:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-10-15 16:50:33,517 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-10-15 16:50:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:33,517 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-10-15 16:50:33,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-10-15 16:50:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:33,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:33,517 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:33,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:33,718 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-10-15 16:50:33,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:33,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102099062] [2020-10-15 16:50:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102099062] [2020-10-15 16:50:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822487462] [2020-10-15 16:50:34,721 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 [2020-10-15 16:50:34,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:50:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:34,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:34,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:34,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:34,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731099437] [2020-10-15 16:50:34,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:34,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:34,832 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-10-15 16:50:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:37,314 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-10-15 16:50:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:50:37,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:50:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:37,318 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:50:37,319 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:50:37,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:50:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:50:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-15 16:50:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:50:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-10-15 16:50:37,322 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-10-15 16:50:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:37,322 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-10-15 16:50:37,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-10-15 16:50:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:37,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:37,323 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:37,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:37,524 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-10-15 16:50:37,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:37,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599533906] [2020-10-15 16:50:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:38,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599533906] [2020-10-15 16:50:38,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610130118] [2020-10-15 16:50:38,565 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 [2020-10-15 16:50:38,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:50:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:38,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:38,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:38,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:38,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585135169] [2020-10-15 16:50:38,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:38,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:38,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:38,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:38,724 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-10-15 16:50:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:41,404 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-10-15 16:50:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:50:41,408 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:41,409 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:50:41,409 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:50:41,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:50:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:50:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-10-15 16:50:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:50:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-10-15 16:50:41,412 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-10-15 16:50:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:41,412 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-10-15 16:50:41,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-10-15 16:50:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:41,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:41,413 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:41,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-10-15 16:50:41,614 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-10-15 16:50:41,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:41,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187285380] [2020-10-15 16:50:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:42,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187285380] [2020-10-15 16:50:42,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970585930] [2020-10-15 16:50:42,593 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 [2020-10-15 16:50:42,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:50:42,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:42,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:42,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:42,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509899126] [2020-10-15 16:50:42,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:42,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:42,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:42,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:42,706 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-10-15 16:50:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:45,376 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-10-15 16:50:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:50:45,381 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:50:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:45,381 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:50:45,381 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:50:45,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:50:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:50:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-15 16:50:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:50:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-10-15 16:50:45,384 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-10-15 16:50:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:45,385 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-10-15 16:50:45,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-10-15 16:50:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:45,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:45,386 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:45,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:45,596 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-10-15 16:50:45,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:45,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961754963] [2020-10-15 16:50:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:46,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961754963] [2020-10-15 16:50:46,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483149024] [2020-10-15 16:50:46,596 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 [2020-10-15 16:50:46,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:50:46,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:46,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:46,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:46,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:46,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:46,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:46,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510908469] [2020-10-15 16:50:46,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:46,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:46,760 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-10-15 16:50:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:49,694 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-10-15 16:50:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:50:49,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:49,697 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:50:49,697 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:50:49,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:50:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:50:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-10-15 16:50:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:50:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-10-15 16:50:49,700 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-10-15 16:50:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:49,700 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-10-15 16:50:49,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-10-15 16:50:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:49,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:49,701 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:49,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:49,902 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-10-15 16:50:49,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:49,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247296641] [2020-10-15 16:50:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:50,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247296641] [2020-10-15 16:50:50,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896187302] [2020-10-15 16:50:50,870 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 [2020-10-15 16:50:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:50,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:50,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:50,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057043916] [2020-10-15 16:50:50,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:50,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:50,986 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-10-15 16:50:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:53,801 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-10-15 16:50:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:50:53,806 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:50:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:53,806 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:50:53,806 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:50:53,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:50:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:50:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-10-15 16:50:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:50:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-10-15 16:50:53,810 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-10-15 16:50:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:53,810 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-10-15 16:50:53,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:50:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-10-15 16:50:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:53,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:53,811 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:54,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:54,012 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-10-15 16:50:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:54,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509452809] [2020-10-15 16:50:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:54,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509452809] [2020-10-15 16:50:54,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203801801] [2020-10-15 16:50:54,968 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 [2020-10-15 16:50:55,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:50:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:55,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:50:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:55,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:55,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:50:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819965638] [2020-10-15 16:50:55,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:50:55,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:50:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:50:55,133 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-10-15 16:50:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:50:58,225 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-10-15 16:50:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:50:58,229 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:50:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:50:58,230 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:50:58,230 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:50:58,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:50:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:50:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-10-15 16:50:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:50:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-10-15 16:50:58,233 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-10-15 16:50:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:50:58,233 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-10-15 16:50:58,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:50:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-10-15 16:50:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:50:58,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:50:58,234 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:50:58,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:50:58,435 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:50:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:50:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-10-15 16:50:58,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:50:58,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072506823] [2020-10-15 16:50:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:50:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:50:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072506823] [2020-10-15 16:50:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851225731] [2020-10-15 16:50:59,392 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 [2020-10-15 16:50:59,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:50:59,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:50:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:50:59,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:50:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:50:59,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:50:59,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:50:59,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008034180] [2020-10-15 16:50:59,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:50:59,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:50:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:50:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:50:59,525 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-10-15 16:51:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:02,465 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-10-15 16:51:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:51:02,469 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:51:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:02,470 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:51:02,470 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:51:02,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:51:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:51:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-10-15 16:51:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:51:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-10-15 16:51:02,473 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-10-15 16:51:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:02,473 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-10-15 16:51:02,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:51:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-10-15 16:51:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:02,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:02,474 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:02,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:02,675 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-10-15 16:51:02,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:02,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867754275] [2020-10-15 16:51:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:03,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867754275] [2020-10-15 16:51:03,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825637533] [2020-10-15 16:51:03,601 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 [2020-10-15 16:51:03,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:51:03,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:03,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:03,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:03,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:03,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:51:03,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033204753] [2020-10-15 16:51:03,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:03,769 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-10-15 16:51:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:07,139 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-10-15 16:51:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:51:07,142 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:51:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:07,143 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:51:07,143 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:51:07,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:51:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:51:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-10-15 16:51:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:51:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-10-15 16:51:07,147 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-10-15 16:51:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:07,147 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-10-15 16:51:07,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-10-15 16:51:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:07,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:07,148 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:07,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 16:51:07,359 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-10-15 16:51:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:07,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838323629] [2020-10-15 16:51:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838323629] [2020-10-15 16:51:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422516261] [2020-10-15 16:51:08,276 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 [2020-10-15 16:51:08,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:51:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:08,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:08,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:08,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:51:08,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355517636] [2020-10-15 16:51:08,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:51:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:51:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:51:08,404 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-10-15 16:51:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:11,525 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-10-15 16:51:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:51:11,530 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:51:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:11,531 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:51:11,531 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:51:11,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:51:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:51:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-15 16:51:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:51:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-15 16:51:11,534 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-10-15 16:51:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:11,535 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-15 16:51:11,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:51:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-15 16:51:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:11,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:11,535 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:11,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 16:51:11,736 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-10-15 16:51:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:11,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178074421] [2020-10-15 16:51:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:12,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178074421] [2020-10-15 16:51:12,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377352851] [2020-10-15 16:51:12,663 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 [2020-10-15 16:51:12,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:51:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:12,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:12,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:12,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:51:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413968409] [2020-10-15 16:51:12,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:12,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:12,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:12,835 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-10-15 16:51:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:16,447 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-10-15 16:51:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:51:16,452 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:51:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:16,452 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:51:16,452 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:51:16,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:51:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:51:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-10-15 16:51:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:51:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-15 16:51:16,456 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-10-15 16:51:16,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:16,456 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-15 16:51:16,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-15 16:51:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:16,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:16,457 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:16,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 16:51:16,658 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-10-15 16:51:16,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:16,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601958502] [2020-10-15 16:51:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:17,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601958502] [2020-10-15 16:51:17,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659699910] [2020-10-15 16:51:17,583 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 [2020-10-15 16:51:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:17,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:17,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:51:17,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966751941] [2020-10-15 16:51:17,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:51:17,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:17,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:51:17,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:51:17,710 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-10-15 16:51:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:21,111 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-10-15 16:51:21,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:51:21,115 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:51:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:21,116 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:51:21,116 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:51:21,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:51:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:51:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-10-15 16:51:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:51:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-10-15 16:51:21,120 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-10-15 16:51:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:21,120 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-10-15 16:51:21,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:51:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-10-15 16:51:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:21,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:21,120 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:21,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:21,321 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-10-15 16:51:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:21,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962369015] [2020-10-15 16:51:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962369015] [2020-10-15 16:51:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349159569] [2020-10-15 16:51:22,276 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 [2020-10-15 16:51:22,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:51:22,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:22,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:22,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:22,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:51:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482565427] [2020-10-15 16:51:22,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:22,459 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-10-15 16:51:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:26,447 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-10-15 16:51:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:51:26,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:51:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:26,451 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:51:26,451 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:51:26,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:51:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:51:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-15 16:51:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:51:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-15 16:51:26,454 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-10-15 16:51:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:26,454 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-15 16:51:26,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-15 16:51:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:26,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:26,455 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:26,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 16:51:26,656 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-10-15 16:51:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:26,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779095338] [2020-10-15 16:51:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:27,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779095338] [2020-10-15 16:51:27,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851642204] [2020-10-15 16:51:27,526 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 [2020-10-15 16:51:27,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:51:27,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:27,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:27,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:51:27,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534847355] [2020-10-15 16:51:27,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:51:27,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:51:27,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:51:27,659 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-10-15 16:51:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:31,283 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-10-15 16:51:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:51:31,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:51:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:31,287 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:51:31,287 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:51:31,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:51:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:51:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-15 16:51:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:51:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 16:51:31,290 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-10-15 16:51:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:31,290 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 16:51:31,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:51:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 16:51:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:31,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:31,291 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:31,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:31,492 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-10-15 16:51:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:31,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395589320] [2020-10-15 16:51:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:32,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395589320] [2020-10-15 16:51:32,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581530502] [2020-10-15 16:51:32,425 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 [2020-10-15 16:51:32,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:51:32,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:32,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:32,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:32,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:51:32,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636974908] [2020-10-15 16:51:32,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:32,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:32,616 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-10-15 16:51:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:36,875 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-10-15 16:51:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:51:36,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:51:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:36,880 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:51:36,880 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:51:36,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:51:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:51:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-15 16:51:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:51:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 16:51:36,883 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-10-15 16:51:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:36,883 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 16:51:36,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 16:51:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:36,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:36,884 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:37,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-10-15 16:51:37,084 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-10-15 16:51:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:37,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958178025] [2020-10-15 16:51:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:38,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958178025] [2020-10-15 16:51:38,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280106345] [2020-10-15 16:51:38,031 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 [2020-10-15 16:51:38,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:51:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:38,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:38,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:51:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591213291] [2020-10-15 16:51:38,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:51:38,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:51:38,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:51:38,165 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-10-15 16:51:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:41,983 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-10-15 16:51:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:51:41,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:51:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:41,989 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:51:41,989 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:51:41,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:51:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:51:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-15 16:51:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:51:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-15 16:51:41,992 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-10-15 16:51:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:41,992 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-15 16:51:41,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:51:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-15 16:51:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:41,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:41,993 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:42,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:42,194 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-10-15 16:51:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:42,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744849910] [2020-10-15 16:51:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:43,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744849910] [2020-10-15 16:51:43,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016054330] [2020-10-15 16:51:43,139 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 [2020-10-15 16:51:43,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:51:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:43,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:51:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:43,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:43,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:51:43,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053267921] [2020-10-15 16:51:43,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:43,340 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-15 16:51:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:47,876 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-10-15 16:51:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:51:47,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:51:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:47,880 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:51:47,880 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:51:47,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:51:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:51:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-10-15 16:51:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:51:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 16:51:47,884 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-10-15 16:51:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:47,884 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 16:51:47,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 16:51:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:47,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:47,885 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:48,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:48,086 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-10-15 16:51:48,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:48,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686440170] [2020-10-15 16:51:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:49,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686440170] [2020-10-15 16:51:49,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298697657] [2020-10-15 16:51:49,003 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 [2020-10-15 16:51:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:49,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 16:51:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:49,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 16:51:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144508923] [2020-10-15 16:51:49,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 16:51:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 16:51:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:51:49,138 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-10-15 16:51:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:53,085 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-10-15 16:51:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:51:53,089 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 16:51:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:53,089 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:51:53,089 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:51:53,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:51:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:51:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-10-15 16:51:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 16:51:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-10-15 16:51:53,093 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-10-15 16:51:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:53,093 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-10-15 16:51:53,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 16:51:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-10-15 16:51:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 16:51:53,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:53,093 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:53,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-10-15 16:51:53,295 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:53,295 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-10-15 16:51:53,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:53,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337131438] [2020-10-15 16:51:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:51:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:54,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337131438] [2020-10-15 16:51:54,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673518044] [2020-10-15 16:51:54,270 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 [2020-10-15 16:51:54,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:51:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:51:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:51:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:51:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:51:54,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:51:54,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 16:51:54,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136394202] [2020-10-15 16:51:54,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:51:54,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:51:54,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:51:54,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:51:54,483 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-10-15 16:51:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:51:59,001 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-10-15 16:51:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:51:59,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 16:51:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:51:59,006 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:51:59,006 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:51:59,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:51:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:51:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-15 16:51:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:51:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-15 16:51:59,016 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-15 16:51:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:51:59,016 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-15 16:51:59,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:51:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-15 16:51:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:51:59,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:51:59,017 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:51:59,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:51:59,218 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:51:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:51:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-10-15 16:51:59,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:51:59,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429005191] [2020-10-15 16:51:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:51:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:00,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429005191] [2020-10-15 16:52:00,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443784265] [2020-10-15 16:52:00,566 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 [2020-10-15 16:52:00,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:52:00,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:00,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:00,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:00,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:00,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081625342] [2020-10-15 16:52:00,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:00,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:00,674 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-15 16:52:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:02,779 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-10-15 16:52:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:52:02,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:02,781 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:52:02,782 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 16:52:02,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:52:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 16:52:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-10-15 16:52:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:02,785 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:02,785 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:02,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:02,792 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:02,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 16:52:02,993 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-10-15 16:52:02,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:02,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491424506] [2020-10-15 16:52:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:04,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491424506] [2020-10-15 16:52:04,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664402439] [2020-10-15 16:52:04,329 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 [2020-10-15 16:52:04,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:52:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:04,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:04,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:04,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:04,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971691758] [2020-10-15 16:52:04,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:04,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:04,493 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:07,037 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-10-15 16:52:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:52:07,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:07,042 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:52:07,042 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:52:07,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:52:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:52:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-15 16:52:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:07,045 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:07,045 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:07,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:07,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:07,046 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:07,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 16:52:07,247 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-10-15 16:52:07,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:07,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679916286] [2020-10-15 16:52:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679916286] [2020-10-15 16:52:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68791810] [2020-10-15 16:52:08,530 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 [2020-10-15 16:52:08,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:52:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:08,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:08,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054638779] [2020-10-15 16:52:08,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:08,625 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:10,956 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-10-15 16:52:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:52:10,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:10,960 INFO L225 Difference]: With dead ends: 158 [2020-10-15 16:52:10,961 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 16:52:10,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:52:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 16:52:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-10-15 16:52:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:10,964 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:10,964 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:10,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:10,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:10,965 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:11,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 16:52:11,166 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-10-15 16:52:11,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:11,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313146941] [2020-10-15 16:52:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:12,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313146941] [2020-10-15 16:52:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48198705] [2020-10-15 16:52:12,413 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 [2020-10-15 16:52:12,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:52:12,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:12,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:12,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:12,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:12,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:12,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181637923] [2020-10-15 16:52:12,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:12,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:12,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:12,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:12,622 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:15,445 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-10-15 16:52:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:52:15,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:15,449 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:52:15,449 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:52:15,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:52:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:52:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-10-15 16:52:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:15,453 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:15,453 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:15,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:15,454 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:15,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 16:52:15,655 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:15,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-10-15 16:52:15,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:15,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479500387] [2020-10-15 16:52:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:16,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479500387] [2020-10-15 16:52:16,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988105911] [2020-10-15 16:52:16,462 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 [2020-10-15 16:52:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:16,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:16,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:16,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:16,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824899616] [2020-10-15 16:52:16,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:16,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:16,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:16,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:16,534 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:18,176 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-15 16:52:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:52:18,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:18,179 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:52:18,179 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:52:18,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:52:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:52:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-15 16:52:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:18,181 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:18,182 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:18,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:18,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:18,182 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:18,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:18,389 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-10-15 16:52:18,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:18,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209193750] [2020-10-15 16:52:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:19,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209193750] [2020-10-15 16:52:19,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016551535] [2020-10-15 16:52:19,217 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 [2020-10-15 16:52:19,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:52:19,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:19,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:19,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:19,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:19,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817466017] [2020-10-15 16:52:19,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:19,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:19,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:19,344 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:21,378 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 16:52:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:52:21,380 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:21,381 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:52:21,381 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:52:21,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:52:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:52:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-10-15 16:52:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:21,383 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:21,384 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:21,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:21,384 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:21,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:21,384 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:21,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 16:52:21,585 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-10-15 16:52:21,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:21,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512719608] [2020-10-15 16:52:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:22,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512719608] [2020-10-15 16:52:22,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059973528] [2020-10-15 16:52:22,379 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 [2020-10-15 16:52:22,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:52:22,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:22,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:22,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:22,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614789730] [2020-10-15 16:52:22,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:22,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:22,474 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:24,234 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 16:52:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:52:24,236 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:24,236 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:52:24,237 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:52:24,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:52:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:52:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-15 16:52:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:24,240 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:24,240 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:24,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:24,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:24,244 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:24,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 16:52:24,445 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-10-15 16:52:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:24,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915842705] [2020-10-15 16:52:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:25,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915842705] [2020-10-15 16:52:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724773054] [2020-10-15 16:52:25,173 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 [2020-10-15 16:52:25,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:52:25,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:25,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:25,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:25,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:25,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:25,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:25,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678453646] [2020-10-15 16:52:25,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:25,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:25,298 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:27,424 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-10-15 16:52:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:52:27,426 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:27,426 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:52:27,427 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:52:27,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:52:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:52:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-15 16:52:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:27,429 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:27,430 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:27,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:27,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:27,430 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:27,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-10-15 16:52:27,633 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-10-15 16:52:27,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:27,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100377276] [2020-10-15 16:52:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:28,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100377276] [2020-10-15 16:52:28,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355215154] [2020-10-15 16:52:28,332 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 [2020-10-15 16:52:28,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:52:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:28,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:28,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:28,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947848213] [2020-10-15 16:52:28,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:28,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:28,423 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:30,232 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-10-15 16:52:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:52:30,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:30,234 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:52:30,234 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:52:30,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:52:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:52:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-10-15 16:52:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:30,237 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:30,237 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:30,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:30,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:30,238 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:30,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:30,439 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-10-15 16:52:30,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:30,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800276337] [2020-10-15 16:52:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:31,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800276337] [2020-10-15 16:52:31,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363531915] [2020-10-15 16:52:31,131 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 [2020-10-15 16:52:31,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:52:31,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:31,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:31,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:31,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:31,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:31,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:31,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104504712] [2020-10-15 16:52:31,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:31,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:31,266 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:33,593 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-15 16:52:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:52:33,595 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:33,596 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:52:33,596 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:52:33,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:52:33,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:52:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-15 16:52:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:33,598 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:33,598 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:33,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:33,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:33,599 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:33,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:33,800 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-10-15 16:52:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:33,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538811242] [2020-10-15 16:52:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538811242] [2020-10-15 16:52:34,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132378206] [2020-10-15 16:52:34,514 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 [2020-10-15 16:52:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:34,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:34,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:34,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716508895] [2020-10-15 16:52:34,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:34,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:34,605 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:36,656 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-10-15 16:52:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:52:36,658 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:36,658 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:52:36,659 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:52:36,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:52:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:52:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-10-15 16:52:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:36,661 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:36,661 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:36,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:36,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:36,661 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:36,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-15 16:52:36,862 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-10-15 16:52:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:36,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822784156] [2020-10-15 16:52:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:37,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822784156] [2020-10-15 16:52:37,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095187959] [2020-10-15 16:52:37,580 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 [2020-10-15 16:52:37,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:52:37,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:37,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:37,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789628658] [2020-10-15 16:52:37,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:37,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:37,714 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:40,110 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-10-15 16:52:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:52:40,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:40,112 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:52:40,112 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:52:40,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:52:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:52:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-15 16:52:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:40,115 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:40,115 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:40,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:40,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:40,116 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:40,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-15 16:52:40,317 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-10-15 16:52:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:40,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899628000] [2020-10-15 16:52:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:40,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899628000] [2020-10-15 16:52:40,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668792021] [2020-10-15 16:52:40,991 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 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 [2020-10-15 16:52:41,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:52:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:41,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:41,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304006337] [2020-10-15 16:52:41,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:41,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:41,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:41,087 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:43,246 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-10-15 16:52:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:52:43,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:43,249 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:52:43,249 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 16:52:43,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:52:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 16:52:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-10-15 16:52:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:43,252 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:43,252 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:43,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:43,252 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:43,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-15 16:52:43,453 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-10-15 16:52:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:43,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844432123] [2020-10-15 16:52:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844432123] [2020-10-15 16:52:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807134680] [2020-10-15 16:52:44,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:52:44,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:52:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:44,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:44,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:44,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:44,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:44,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741706062] [2020-10-15 16:52:44,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:44,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:44,292 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:46,998 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-10-15 16:52:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:52:47,000 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:47,001 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:52:47,001 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:52:47,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:52:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:52:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-15 16:52:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:47,008 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:47,008 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:47,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:47,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:47,009 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:47,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-15 16:52:47,209 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-10-15 16:52:47,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:47,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903276633] [2020-10-15 16:52:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:47,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903276633] [2020-10-15 16:52:47,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475068648] [2020-10-15 16:52:47,913 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 [2020-10-15 16:52:47,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:52:47,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:48,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:48,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:48,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218166608] [2020-10-15 16:52:48,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:48,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:48,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:48,010 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:50,291 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-10-15 16:52:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:52:50,293 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:50,293 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:52:50,293 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:52:50,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:52:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:52:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-10-15 16:52:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:50,296 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:50,296 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:50,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:50,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:50,297 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:50,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:50,497 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-10-15 16:52:50,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:50,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528802053] [2020-10-15 16:52:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:51,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528802053] [2020-10-15 16:52:51,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790288542] [2020-10-15 16:52:51,200 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 [2020-10-15 16:52:51,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:52:51,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:51,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:51,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:51,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:51,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115331944] [2020-10-15 16:52:51,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:51,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:51,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:51,354 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:52:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:54,250 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-10-15 16:52:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:52:54,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:52:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:54,253 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:52:54,253 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:52:54,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:52:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:52:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-15 16:52:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:52:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:52:54,255 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:52:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:54,255 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:52:54,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:52:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:52:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:54,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:54,256 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:54,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-15 16:52:54,456 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-10-15 16:52:54,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:54,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267008293] [2020-10-15 16:52:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:55,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267008293] [2020-10-15 16:52:55,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998659521] [2020-10-15 16:52:55,171 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 [2020-10-15 16:52:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:55,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:55,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:52:55,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143686391] [2020-10-15 16:52:55,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:52:55,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:52:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:52:55,283 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:52:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:52:57,795 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-15 16:52:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:52:57,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:52:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:52:57,797 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:52:57,798 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:52:57,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:52:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:52:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-15 16:52:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:52:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:52:57,800 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:52:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:52:57,800 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:52:57,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:52:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:52:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:52:57,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:52:57,804 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:52:58,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:52:58,005 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:52:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:52:58,006 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-10-15 16:52:58,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:52:58,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417610211] [2020-10-15 16:52:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:52:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:52:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417610211] [2020-10-15 16:52:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579844650] [2020-10-15 16:52:58,680 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 [2020-10-15 16:52:58,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:52:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:52:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:52:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:52:58,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:52:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:52:58,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:52:58,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:52:58,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834062590] [2020-10-15 16:52:58,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:52:58,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:52:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:52:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:52:58,823 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:53:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:02,000 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-10-15 16:53:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:53:02,002 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:53:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:02,003 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:53:02,003 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:53:02,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:53:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:53:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-10-15 16:53:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:53:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:53:02,005 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:53:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:02,006 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:53:02,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:53:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:02,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:02,006 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:02,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-10-15 16:53:02,207 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:02,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-10-15 16:53:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:02,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596828327] [2020-10-15 16:53:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596828327] [2020-10-15 16:53:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831151274] [2020-10-15 16:53:02,928 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 [2020-10-15 16:53:02,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:53:02,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:02,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:02,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:03,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:03,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:53:03,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907325329] [2020-10-15 16:53:03,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:53:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:53:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:53:03,042 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:53:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:05,798 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-10-15 16:53:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:53:05,800 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:53:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:05,801 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:53:05,801 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:53:05,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:53:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:53:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-15 16:53:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:53:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:53:05,804 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:53:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:05,804 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:53:05,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:53:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:53:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:05,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:05,804 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:06,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:06,005 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-10-15 16:53:06,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:06,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947556325] [2020-10-15 16:53:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947556325] [2020-10-15 16:53:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308515120] [2020-10-15 16:53:06,680 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 [2020-10-15 16:53:06,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:53:06,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:06,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:06,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:06,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:53:06,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218284702] [2020-10-15 16:53:06,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:06,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:06,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:06,823 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:53:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:10,105 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 16:53:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:53:10,107 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:53:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:10,108 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:53:10,108 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:53:10,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:53:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:53:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-15 16:53:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:53:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:53:10,110 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:53:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:10,111 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:53:10,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:53:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:10,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:10,111 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:10,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-10-15 16:53:10,312 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-10-15 16:53:10,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:10,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679029664] [2020-10-15 16:53:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679029664] [2020-10-15 16:53:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562721639] [2020-10-15 16:53:11,023 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 [2020-10-15 16:53:11,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 16:53:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:11,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:11,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:53:11,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481926315] [2020-10-15 16:53:11,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:53:11,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:53:11,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:53:11,139 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:53:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:14,073 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-10-15 16:53:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:53:14,076 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:53:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:14,076 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:53:14,076 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:53:14,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:53:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:53:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-15 16:53:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:53:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:53:14,079 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 16:53:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:14,079 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:53:14,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:53:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:53:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:14,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:14,080 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:14,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:14,281 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-10-15 16:53:14,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:14,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676894396] [2020-10-15 16:53:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:14,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676894396] [2020-10-15 16:53:14,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057801692] [2020-10-15 16:53:14,966 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 [2020-10-15 16:53:15,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 16:53:15,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:15,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:15,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:15,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:15,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:15,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:53:15,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96097370] [2020-10-15 16:53:15,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:15,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:15,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:15,120 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 16:53:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:18,576 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-10-15 16:53:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:53:18,578 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:53:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:18,578 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:53:18,578 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:53:18,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 16:53:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:53:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-15 16:53:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:53:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:53:18,581 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 16:53:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:18,581 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:53:18,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:53:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:18,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:18,581 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:18,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:18,782 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:18,783 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-10-15 16:53:18,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:18,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826401277] [2020-10-15 16:53:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:19,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826401277] [2020-10-15 16:53:19,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837335965] [2020-10-15 16:53:19,482 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 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 [2020-10-15 16:53:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:19,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:19,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:19,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 16:53:19,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263485372] [2020-10-15 16:53:19,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 16:53:19,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:19,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 16:53:19,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:53:19,585 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 16:53:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:22,503 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-10-15 16:53:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:53:22,505 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 16:53:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:22,505 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:53:22,505 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:53:22,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:53:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:53:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-10-15 16:53:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-15 16:53:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-10-15 16:53:22,508 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-10-15 16:53:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:22,509 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-10-15 16:53:22,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 16:53:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-10-15 16:53:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:22,509 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:22,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-15 16:53:22,710 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-10-15 16:53:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:22,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134200206] [2020-10-15 16:53:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:23,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134200206] [2020-10-15 16:53:23,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604457100] [2020-10-15 16:53:23,378 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 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 [2020-10-15 16:53:23,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:53:23,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:23,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:23,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:23,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:23,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:53:23,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500462093] [2020-10-15 16:53:23,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:23,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:23,527 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-10-15 16:53:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:26,964 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-10-15 16:53:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 16:53:26,966 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:53:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:26,967 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:53:26,967 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:53:26,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:53:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:53:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-10-15 16:53:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:53:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-10-15 16:53:26,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-10-15 16:53:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:26,969 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-10-15 16:53:26,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-10-15 16:53:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 16:53:26,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:26,969 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:27,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-15 16:53:27,170 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:27,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:27,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-10-15 16:53:27,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:27,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897032230] [2020-10-15 16:53:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897032230] [2020-10-15 16:53:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560866787] [2020-10-15 16:53:27,860 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 [2020-10-15 16:53:27,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 16:53:27,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:27,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 16:53:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:27,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:53:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:28,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:28,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 16:53:28,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391163495] [2020-10-15 16:53:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:28,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:28,028 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-10-15 16:53:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:31,313 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 16:53:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:53:31,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 16:53:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:31,315 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:53:31,315 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 16:53:31,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:53:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 16:53:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-15 16:53:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 16:53:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 16:53:31,318 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-10-15 16:53:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:31,318 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 16:53:31,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 16:53:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:31,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:31,319 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:31,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-10-15 16:53:31,519 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-10-15 16:53:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:31,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787893355] [2020-10-15 16:53:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:32,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787893355] [2020-10-15 16:53:32,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858017149] [2020-10-15 16:53:32,268 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 [2020-10-15 16:53:32,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:53:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:32,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:53:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:32,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:32,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:32,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39110783] [2020-10-15 16:53:32,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:32,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:32,432 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-10-15 16:53:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:35,930 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-10-15 16:53:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:53:35,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:35,933 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:53:35,933 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:53:35,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 16:53:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:53:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-15 16:53:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:53:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-15 16:53:35,935 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-10-15 16:53:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:35,935 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-15 16:53:35,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-15 16:53:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:35,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:35,936 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:36,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:36,137 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-10-15 16:53:36,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:36,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005094806] [2020-10-15 16:53:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:37,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005094806] [2020-10-15 16:53:37,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890258102] [2020-10-15 16:53:37,124 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:37,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:53:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:37,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:37,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:53:37,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127760862] [2020-10-15 16:53:37,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:37,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:37,208 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-10-15 16:53:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:38,621 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-10-15 16:53:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:53:38,623 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:38,624 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:53:38,624 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:53:38,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:53:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:53:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-15 16:53:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:53:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-10-15 16:53:38,626 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-10-15 16:53:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:38,626 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-10-15 16:53:38,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-10-15 16:53:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:38,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:38,627 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:38,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-10-15 16:53:38,827 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-10-15 16:53:38,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:38,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308193114] [2020-10-15 16:53:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:39,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308193114] [2020-10-15 16:53:39,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646765564] [2020-10-15 16:53:39,812 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:39,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:53:39,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:39,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:39,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:39,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:39,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:39,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565377822] [2020-10-15 16:53:39,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:39,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:39,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:39,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:39,953 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-10-15 16:53:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:41,527 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 16:53:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:53:41,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:41,529 INFO L225 Difference]: With dead ends: 146 [2020-10-15 16:53:41,529 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:53:41,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:53:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:53:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-10-15 16:53:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:53:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-10-15 16:53:41,532 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-10-15 16:53:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:41,532 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-10-15 16:53:41,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-10-15 16:53:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:41,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:41,533 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:41,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:41,733 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-10-15 16:53:41,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:41,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839822255] [2020-10-15 16:53:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:42,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839822255] [2020-10-15 16:53:42,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738962893] [2020-10-15 16:53:42,680 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:42,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:42,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:53:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715762703] [2020-10-15 16:53:42,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:42,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:42,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:42,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:42,755 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-10-15 16:53:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:44,462 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 16:53:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:53:44,464 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:44,465 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:53:44,465 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:53:44,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:53:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:53:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-10-15 16:53:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:53:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-10-15 16:53:44,468 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-10-15 16:53:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:44,468 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-10-15 16:53:44,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-10-15 16:53:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:44,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:44,468 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:44,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-15 16:53:44,669 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-10-15 16:53:44,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:44,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697327157] [2020-10-15 16:53:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:45,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697327157] [2020-10-15 16:53:45,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952669481] [2020-10-15 16:53:45,656 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:45,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:53:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:45,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:45,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:45,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:45,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:45,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011887159] [2020-10-15 16:53:45,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:45,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:45,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:45,782 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-10-15 16:53:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:47,548 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-10-15 16:53:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:53:47,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:47,551 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:53:47,551 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:53:47,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:53:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:53:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-10-15 16:53:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:53:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-10-15 16:53:47,553 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-10-15 16:53:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:47,553 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-10-15 16:53:47,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-10-15 16:53:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:47,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:47,554 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:47,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:47,754 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-10-15 16:53:47,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:47,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631631432] [2020-10-15 16:53:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:48,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631631432] [2020-10-15 16:53:48,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472850455] [2020-10-15 16:53:48,681 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:48,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:53:48,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:48,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:48,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:53:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991265555] [2020-10-15 16:53:48,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:48,767 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-10-15 16:53:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:50,561 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-10-15 16:53:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:53:50,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:50,563 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:53:50,563 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:53:50,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:53:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:53:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-10-15 16:53:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:53:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-10-15 16:53:50,566 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-10-15 16:53:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:50,566 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-10-15 16:53:50,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-10-15 16:53:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:50,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:50,567 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:50,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:50,767 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:50,768 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-10-15 16:53:50,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:50,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899724660] [2020-10-15 16:53:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:51,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899724660] [2020-10-15 16:53:51,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92655153] [2020-10-15 16:53:51,705 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:51,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:53:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:51,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:51,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:51,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377755995] [2020-10-15 16:53:51,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:51,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:51,839 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-10-15 16:53:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:53,822 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-10-15 16:53:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:53:53,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:53:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:53,825 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:53:53,825 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 16:53:53,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:53:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 16:53:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-10-15 16:53:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:53:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-10-15 16:53:53,827 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-10-15 16:53:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:53,827 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-10-15 16:53:53,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:53:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-10-15 16:53:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:53,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:53,828 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:54,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-10-15 16:53:54,029 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-10-15 16:53:54,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478876516] [2020-10-15 16:53:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478876516] [2020-10-15 16:53:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796659632] [2020-10-15 16:53:54,928 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:54,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:53:54,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:55,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:55,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:53:55,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185964602] [2020-10-15 16:53:55,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:53:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:53:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:53:55,016 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-10-15 16:53:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:53:56,979 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-10-15 16:53:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:53:56,981 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:53:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:53:56,982 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:53:56,982 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:53:56,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:53:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:53:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-10-15 16:53:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:53:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-10-15 16:53:56,984 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-10-15 16:53:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:53:56,985 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-10-15 16:53:56,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:53:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-10-15 16:53:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:53:56,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:53:56,985 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:53:57,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-10-15 16:53:57,186 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:53:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:53:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-10-15 16:53:57,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:53:57,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37583634] [2020-10-15 16:53:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:53:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:53:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:58,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37583634] [2020-10-15 16:53:58,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124478900] [2020-10-15 16:53:58,095 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:53:58,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:53:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:53:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:53:58,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:53:58,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:53:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:53:58,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:53:58,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:53:58,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627313784] [2020-10-15 16:53:58,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:53:58,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:53:58,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:53:58,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:53:58,240 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-10-15 16:54:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:00,404 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-10-15 16:54:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:54:00,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:00,407 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:54:00,407 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 16:54:00,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:54:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 16:54:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-15 16:54:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:54:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-10-15 16:54:00,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-10-15 16:54:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:00,411 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-10-15 16:54:00,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-10-15 16:54:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:00,412 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:00,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-10-15 16:54:00,619 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-10-15 16:54:00,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:00,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789062444] [2020-10-15 16:54:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:01,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789062444] [2020-10-15 16:54:01,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608434915] [2020-10-15 16:54:01,511 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:01,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:01,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:01,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523753210] [2020-10-15 16:54:01,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:01,604 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-10-15 16:54:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:03,721 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-10-15 16:54:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:54:03,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:03,723 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:54:03,724 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:54:03,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:54:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:54:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-10-15 16:54:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 16:54:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-10-15 16:54:03,726 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-10-15 16:54:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:03,727 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-10-15 16:54:03,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-10-15 16:54:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:03,727 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:03,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-10-15 16:54:03,928 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-10-15 16:54:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680003338] [2020-10-15 16:54:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:04,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680003338] [2020-10-15 16:54:04,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103807975] [2020-10-15 16:54:04,804 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:04,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:54:04,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:04,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:04,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:04,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:04,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581492708] [2020-10-15 16:54:04,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:04,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:04,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:04,946 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-10-15 16:54:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:07,305 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-10-15 16:54:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:54:07,308 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:07,308 INFO L225 Difference]: With dead ends: 162 [2020-10-15 16:54:07,308 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 16:54:07,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:54:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 16:54:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-10-15 16:54:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:54:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-10-15 16:54:07,311 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-10-15 16:54:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:07,311 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-10-15 16:54:07,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-10-15 16:54:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:07,311 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:07,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-10-15 16:54:07,512 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-10-15 16:54:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:07,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632125782] [2020-10-15 16:54:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:08,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632125782] [2020-10-15 16:54:08,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119006438] [2020-10-15 16:54:08,347 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:08,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:54:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:08,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:08,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214029239] [2020-10-15 16:54:08,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:08,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:08,446 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-10-15 16:54:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:10,704 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-10-15 16:54:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:54:10,706 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:10,706 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:54:10,707 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 16:54:10,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:54:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 16:54:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-10-15 16:54:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 16:54:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-10-15 16:54:10,709 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-10-15 16:54:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:10,710 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-10-15 16:54:10,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-10-15 16:54:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:10,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:10,710 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:10,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-10-15 16:54:10,911 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-10-15 16:54:10,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:10,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550047883] [2020-10-15 16:54:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550047883] [2020-10-15 16:54:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764830208] [2020-10-15 16:54:11,777 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:11,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:54:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:11,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:11,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:11,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:11,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:11,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260242654] [2020-10-15 16:54:11,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:11,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:11,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:11,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:11,916 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-10-15 16:54:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:14,475 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-10-15 16:54:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:54:14,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:14,478 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:54:14,479 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:54:14,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:54:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:54:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-10-15 16:54:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:54:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-10-15 16:54:14,481 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-10-15 16:54:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:14,481 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-10-15 16:54:14,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-10-15 16:54:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:14,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:14,481 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:14,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:14,682 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-10-15 16:54:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:14,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572383233] [2020-10-15 16:54:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:15,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572383233] [2020-10-15 16:54:15,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943814538] [2020-10-15 16:54:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:15,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:54:15,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:15,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:15,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:15,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966863397] [2020-10-15 16:54:15,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:15,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:15,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:15,692 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-10-15 16:54:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:18,109 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-10-15 16:54:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:54:18,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:18,112 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:54:18,112 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:54:18,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:54:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:54:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-10-15 16:54:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:54:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-10-15 16:54:18,115 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-10-15 16:54:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:18,115 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-10-15 16:54:18,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-10-15 16:54:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:18,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:18,116 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:18,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-10-15 16:54:18,316 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-10-15 16:54:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:18,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137861514] [2020-10-15 16:54:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:19,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137861514] [2020-10-15 16:54:19,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543352269] [2020-10-15 16:54:19,168 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:19,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:54:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:19,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:19,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:19,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:19,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772541954] [2020-10-15 16:54:19,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:19,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:19,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:19,319 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-10-15 16:54:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:22,094 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-10-15 16:54:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:54:22,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:22,097 INFO L225 Difference]: With dead ends: 158 [2020-10-15 16:54:22,098 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 16:54:22,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:54:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 16:54:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-10-15 16:54:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:54:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-10-15 16:54:22,100 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-10-15 16:54:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:22,100 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-10-15 16:54:22,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-10-15 16:54:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:22,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:22,101 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:22,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-10-15 16:54:22,301 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:22,302 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-10-15 16:54:22,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:22,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871258956] [2020-10-15 16:54:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:23,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871258956] [2020-10-15 16:54:23,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480018575] [2020-10-15 16:54:23,123 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:23,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:23,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793633951] [2020-10-15 16:54:23,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:23,220 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-10-15 16:54:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:25,812 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-10-15 16:54:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:54:25,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:25,815 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:54:25,816 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:54:25,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:54:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:54:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-10-15 16:54:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:54:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-10-15 16:54:25,818 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-10-15 16:54:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:25,818 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-10-15 16:54:25,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-10-15 16:54:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:25,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:25,819 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:26,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:26,019 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-10-15 16:54:26,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:26,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409720244] [2020-10-15 16:54:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409720244] [2020-10-15 16:54:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975797720] [2020-10-15 16:54:26,859 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:26,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:54:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:26,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:26,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:27,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:27,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:27,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968247011] [2020-10-15 16:54:27,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:27,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:27,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:27,004 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-10-15 16:54:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:30,011 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-10-15 16:54:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:54:30,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:30,014 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:54:30,014 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:54:30,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:54:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:54:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-10-15 16:54:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:54:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-10-15 16:54:30,017 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-10-15 16:54:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:30,017 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-10-15 16:54:30,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-10-15 16:54:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:30,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:30,017 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:30,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:30,218 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-10-15 16:54:30,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:30,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521360291] [2020-10-15 16:54:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:31,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521360291] [2020-10-15 16:54:31,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655073460] [2020-10-15 16:54:31,023 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:31,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:54:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:31,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:31,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:31,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:31,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841088979] [2020-10-15 16:54:31,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:31,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:31,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:31,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:31,137 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-10-15 16:54:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:33,868 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-10-15 16:54:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:54:33,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:33,871 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:54:33,871 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:54:33,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:54:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:54:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-10-15 16:54:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:54:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-15 16:54:33,874 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-10-15 16:54:33,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:33,874 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-15 16:54:33,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-15 16:54:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:33,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:33,875 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:34,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:34,075 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-10-15 16:54:34,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:34,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523750141] [2020-10-15 16:54:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:34,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523750141] [2020-10-15 16:54:34,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406788329] [2020-10-15 16:54:34,899 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:34,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:54:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:35,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:35,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:35,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:35,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871899397] [2020-10-15 16:54:35,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:35,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:35,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:35,054 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-10-15 16:54:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:38,262 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 16:54:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:54:38,264 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:38,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:38,264 INFO L225 Difference]: With dead ends: 154 [2020-10-15 16:54:38,264 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:54:38,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:54:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:54:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-10-15 16:54:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:54:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-15 16:54:38,266 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-10-15 16:54:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:38,267 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-15 16:54:38,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-15 16:54:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:38,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:38,267 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:38,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-10-15 16:54:38,468 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-10-15 16:54:38,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:38,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911472997] [2020-10-15 16:54:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:39,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911472997] [2020-10-15 16:54:39,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419656538] [2020-10-15 16:54:39,281 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:39,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:54:39,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:39,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:39,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:39,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:39,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253968637] [2020-10-15 16:54:39,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:39,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:39,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:39,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:39,392 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-10-15 16:54:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:42,356 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-10-15 16:54:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:54:42,358 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:42,359 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:54:42,359 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:54:42,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:54:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:54:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-10-15 16:54:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:54:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-10-15 16:54:42,361 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-10-15 16:54:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:42,361 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-10-15 16:54:42,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-10-15 16:54:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:42,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:42,361 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:42,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-10-15 16:54:42,562 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-10-15 16:54:42,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:42,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354903824] [2020-10-15 16:54:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:43,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354903824] [2020-10-15 16:54:43,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951079038] [2020-10-15 16:54:43,383 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:43,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:54:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:43,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:43,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:43,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931036847] [2020-10-15 16:54:43,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:43,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:43,542 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-10-15 16:54:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:47,007 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-15 16:54:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:54:47,009 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:47,010 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:54:47,010 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:54:47,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:54:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:54:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-15 16:54:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:54:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-15 16:54:47,012 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-10-15 16:54:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:47,012 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-15 16:54:47,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-15 16:54:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:47,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:47,013 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:47,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:47,214 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:47,214 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-10-15 16:54:47,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:47,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083271185] [2020-10-15 16:54:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083271185] [2020-10-15 16:54:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119117340] [2020-10-15 16:54:48,027 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:48,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:48,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:48,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22892576] [2020-10-15 16:54:48,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:48,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:48,140 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-10-15 16:54:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:51,224 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 16:54:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 16:54:51,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:54:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:51,227 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:54:51,227 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:54:51,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 16:54:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:54:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-15 16:54:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:54:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 16:54:51,230 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-10-15 16:54:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:51,230 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 16:54:51,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:54:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 16:54:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:51,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:51,231 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:51,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-10-15 16:54:51,431 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-10-15 16:54:51,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:51,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152671621] [2020-10-15 16:54:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:52,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152671621] [2020-10-15 16:54:52,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280071287] [2020-10-15 16:54:52,256 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:52,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:54:52,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:52,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:54:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:52,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:52,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:54:52,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922408244] [2020-10-15 16:54:52,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:54:52,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:54:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:54:52,408 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-10-15 16:54:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:54:56,145 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 16:54:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:54:56,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:54:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:54:56,149 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:54:56,149 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:54:56,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 16:54:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:54:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-10-15 16:54:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:54:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 16:54:56,151 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-10-15 16:54:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:54:56,151 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 16:54:56,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:54:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 16:54:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:54:56,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:54:56,152 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:54:56,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:56,353 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:54:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:54:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-10-15 16:54:56,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:54:56,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419686785] [2020-10-15 16:54:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:54:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:54:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419686785] [2020-10-15 16:54:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18641112] [2020-10-15 16:54:57,189 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:54:57,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:54:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:54:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:54:57,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:54:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:54:57,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:54:57,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:54:57,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274270089] [2020-10-15 16:54:57,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:54:57,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:54:57,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:54:57,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:54:57,308 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-10-15 16:55:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:00,596 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-10-15 16:55:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 16:55:00,598 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:55:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:00,599 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:55:00,599 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:55:00,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:55:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:55:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-10-15 16:55:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 16:55:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-15 16:55:00,602 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-10-15 16:55:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:00,603 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-15 16:55:00,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:55:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-15 16:55:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:55:00,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:00,603 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:00,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-10-15 16:55:00,804 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-10-15 16:55:00,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:00,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695504243] [2020-10-15 16:55:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695504243] [2020-10-15 16:55:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791618970] [2020-10-15 16:55:01,633 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:01,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:55:01,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:01,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:55:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:01,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:01,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:01,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:55:01,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368105816] [2020-10-15 16:55:01,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:01,801 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-15 16:55:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:05,714 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-10-15 16:55:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 16:55:05,716 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:55:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:05,717 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:55:05,717 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:55:05,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 16:55:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:55:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-10-15 16:55:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 16:55:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 16:55:05,720 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-10-15 16:55:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:05,720 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 16:55:05,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 16:55:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:55:05,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:05,721 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:05,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:05,921 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-10-15 16:55:05,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:05,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146964338] [2020-10-15 16:55:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146964338] [2020-10-15 16:55:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858841099] [2020-10-15 16:55:06,771 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:06,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:55:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:06,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:55:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:06,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:06,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 16:55:06,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96970979] [2020-10-15 16:55:06,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 16:55:06,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 16:55:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:55:06,892 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-10-15 16:55:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:10,389 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-10-15 16:55:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 16:55:10,392 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 16:55:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:10,392 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:55:10,392 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:55:10,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 16:55:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:55:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-10-15 16:55:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:55:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-10-15 16:55:10,395 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-10-15 16:55:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:10,395 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-10-15 16:55:10,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 16:55:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-10-15 16:55:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 16:55:10,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:10,396 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:10,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:10,596 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-10-15 16:55:10,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:10,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168366365] [2020-10-15 16:55:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:11,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168366365] [2020-10-15 16:55:11,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169816189] [2020-10-15 16:55:11,430 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:11,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:55:11,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 16:55:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:11,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:11,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:11,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 16:55:11,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284657762] [2020-10-15 16:55:11,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:11,603 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-10-15 16:55:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:15,566 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-10-15 16:55:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 16:55:15,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 16:55:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:15,569 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:55:15,569 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:55:15,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 16:55:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:55:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-10-15 16:55:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 16:55:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-15 16:55:15,572 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-15 16:55:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:15,572 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-15 16:55:15,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-15 16:55:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:15,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:15,572 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:15,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:15,773 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-10-15 16:55:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:15,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886573862] [2020-10-15 16:55:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:16,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886573862] [2020-10-15 16:55:16,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953242762] [2020-10-15 16:55:16,920 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:16,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:17,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:17,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:17,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354559926] [2020-10-15 16:55:17,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:17,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:17,004 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-15 16:55:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:18,810 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-10-15 16:55:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:55:18,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:18,813 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:55:18,813 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:55:18,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:55:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:55:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-10-15 16:55:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:18,816 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:18,816 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:18,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:18,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:18,817 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:19,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-10-15 16:55:19,017 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:19,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-10-15 16:55:19,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:19,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80953890] [2020-10-15 16:55:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:20,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80953890] [2020-10-15 16:55:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438667918] [2020-10-15 16:55:20,198 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:20,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:55:20,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:20,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:20,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:20,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:20,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216302982] [2020-10-15 16:55:20,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:20,338 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:22,384 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-10-15 16:55:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:55:22,386 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:22,387 INFO L225 Difference]: With dead ends: 171 [2020-10-15 16:55:22,387 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:55:22,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:55:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:55:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-10-15 16:55:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:22,390 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:22,390 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:22,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:22,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:22,391 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:22,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:22,591 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-10-15 16:55:22,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:22,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650579484] [2020-10-15 16:55:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:23,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650579484] [2020-10-15 16:55:23,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450698948] [2020-10-15 16:55:23,691 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:23,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:55:23,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:23,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:23,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:23,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721792120] [2020-10-15 16:55:23,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:23,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:23,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:23,777 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:25,848 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-10-15 16:55:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:55:25,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:25,851 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:55:25,852 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:55:25,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:55:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:55:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-10-15 16:55:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:25,855 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:25,855 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:25,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:25,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:25,856 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:26,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-10-15 16:55:26,056 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-10-15 16:55:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:26,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828898443] [2020-10-15 16:55:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828898443] [2020-10-15 16:55:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312909679] [2020-10-15 16:55:27,193 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:27,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:55:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:27,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:27,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:27,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:27,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174745825] [2020-10-15 16:55:27,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:27,335 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:29,666 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-10-15 16:55:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:55:29,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:29,669 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:55:29,669 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:55:29,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:55:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:55:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-10-15 16:55:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:29,672 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:29,672 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:29,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:29,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:29,672 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:29,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:29,873 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-10-15 16:55:29,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:29,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202647815] [2020-10-15 16:55:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202647815] [2020-10-15 16:55:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236064814] [2020-10-15 16:55:30,954 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:31,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:55:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:31,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:31,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:31,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275540730] [2020-10-15 16:55:31,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:31,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:31,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:31,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:31,048 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:33,288 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-15 16:55:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:55:33,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:33,292 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:55:33,292 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 16:55:33,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:55:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 16:55:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-10-15 16:55:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:33,294 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:33,294 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:33,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:33,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:33,295 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:33,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-10-15 16:55:33,495 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-10-15 16:55:33,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:33,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563788168] [2020-10-15 16:55:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:34,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563788168] [2020-10-15 16:55:34,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551442108] [2020-10-15 16:55:34,616 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:34,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:55:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:34,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:34,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:34,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:34,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:34,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307302308] [2020-10-15 16:55:34,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:34,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:34,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:34,778 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:37,340 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-15 16:55:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:55:37,342 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:37,343 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:55:37,343 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 16:55:37,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 16:55:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 16:55:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-10-15 16:55:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:37,346 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:37,346 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:37,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:37,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:37,346 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:37,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-10-15 16:55:37,547 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-10-15 16:55:37,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:37,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884336943] [2020-10-15 16:55:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:38,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884336943] [2020-10-15 16:55:38,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016932304] [2020-10-15 16:55:38,610 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:38,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:38,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:38,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:38,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:38,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552604839] [2020-10-15 16:55:38,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:38,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:38,702 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:41,120 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-10-15 16:55:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:55:41,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:41,123 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:55:41,123 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:55:41,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:55:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:55:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-10-15 16:55:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:41,126 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:41,126 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:41,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:41,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:41,126 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:41,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:41,327 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-10-15 16:55:41,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:41,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484266445] [2020-10-15 16:55:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:42,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484266445] [2020-10-15 16:55:42,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813943191] [2020-10-15 16:55:42,443 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:42,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:55:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:42,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:42,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:42,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:42,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056597763] [2020-10-15 16:55:42,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:42,600 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:45,391 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-10-15 16:55:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:55:45,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:45,395 INFO L225 Difference]: With dead ends: 159 [2020-10-15 16:55:45,395 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:55:45,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 16:55:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:55:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-15 16:55:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:45,397 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:45,397 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:45,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:45,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:45,398 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:45,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-10-15 16:55:45,598 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-10-15 16:55:45,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:45,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168206736] [2020-10-15 16:55:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:46,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168206736] [2020-10-15 16:55:46,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612466208] [2020-10-15 16:55:46,654 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:46,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:55:46,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:46,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:46,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:46,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:46,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573221059] [2020-10-15 16:55:46,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:46,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:46,760 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:49,359 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2020-10-15 16:55:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:55:49,361 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:49,362 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:55:49,362 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:55:49,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 16:55:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:55:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2020-10-15 16:55:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:49,364 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:49,365 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:49,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:49,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:49,365 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:49,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:49,566 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash -829608221, now seen corresponding path program 370 times [2020-10-15 16:55:49,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:49,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660555582] [2020-10-15 16:55:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:50,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660555582] [2020-10-15 16:55:50,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470937625] [2020-10-15 16:55:50,626 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:50,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:55:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:50,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:50,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:50,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:50,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094619925] [2020-10-15 16:55:50,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:50,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:50,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:50,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:50,780 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:55:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:53,830 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-10-15 16:55:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:55:53,832 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:55:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:53,833 INFO L225 Difference]: With dead ends: 155 [2020-10-15 16:55:53,833 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 16:55:53,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 16:55:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 16:55:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-15 16:55:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:55:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:55:53,836 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:55:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:53,836 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:55:53,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:55:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:55:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:53,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:53,837 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:54,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:54,037 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 371 times [2020-10-15 16:55:54,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:54,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840653768] [2020-10-15 16:55:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:55,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840653768] [2020-10-15 16:55:55,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538716349] [2020-10-15 16:55:55,065 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:55,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:55:55,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:55,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:55,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:55,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:55,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:55:55,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629476176] [2020-10-15 16:55:55,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:55:55,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:55,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:55:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:55:55,165 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:55:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:55:57,954 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 16:55:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:55:57,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:55:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:55:57,957 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:55:57,957 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:55:57,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1130, Invalid=3292, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 16:55:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:55:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2020-10-15 16:55:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:55:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:55:57,960 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:55:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:55:57,960 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:55:57,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:55:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:55:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:55:57,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:55:57,961 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:55:58,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:58,161 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:55:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:55:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1353021253, now seen corresponding path program 372 times [2020-10-15 16:55:58,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:55:58,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013938863] [2020-10-15 16:55:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:55:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:55:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013938863] [2020-10-15 16:55:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861114376] [2020-10-15 16:55:59,191 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:55:59,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:55:59,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:55:59,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:55:59,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:55:59,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:55:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:55:59,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:55:59,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:55:59,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026733856] [2020-10-15 16:55:59,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:55:59,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:55:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:55:59,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:55:59,366 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:56:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:02,741 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2020-10-15 16:56:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:56:02,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:56:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:02,745 INFO L225 Difference]: With dead ends: 151 [2020-10-15 16:56:02,745 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 16:56:02,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 16:56:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 16:56:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-15 16:56:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:56:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:56:02,748 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:56:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:02,748 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:56:02,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:56:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:02,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:02,749 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:02,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:02,949 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 373 times [2020-10-15 16:56:02,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:02,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071593282] [2020-10-15 16:56:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:03,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071593282] [2020-10-15 16:56:03,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538528189] [2020-10-15 16:56:03,961 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:04,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:04,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:04,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:04,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:56:04,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357309633] [2020-10-15 16:56:04,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:56:04,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:56:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:56:04,067 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:56:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:07,055 INFO L93 Difference]: Finished difference Result 148 states and 359 transitions. [2020-10-15 16:56:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:56:07,057 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:56:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:07,058 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:56:07,058 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 16:56:07,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1209, Invalid=3483, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 16:56:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 16:56:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-15 16:56:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:56:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:56:07,061 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:56:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:07,061 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:56:07,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:56:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:56:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:07,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:07,062 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:07,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2020-10-15 16:56:07,263 INFO L429 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1013419993, now seen corresponding path program 374 times [2020-10-15 16:56:07,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:07,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394644722] [2020-10-15 16:56:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:08,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394644722] [2020-10-15 16:56:08,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105150135] [2020-10-15 16:56:08,270 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:08,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:56:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:08,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:08,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:08,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:56:08,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391765784] [2020-10-15 16:56:08,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:08,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:08,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:08,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:08,435 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:56:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:11,953 INFO L93 Difference]: Finished difference Result 147 states and 357 transitions. [2020-10-15 16:56:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 16:56:11,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:56:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:11,956 INFO L225 Difference]: With dead ends: 147 [2020-10-15 16:56:11,956 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 16:56:11,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 16:56:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 16:56:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-15 16:56:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:56:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:56:11,959 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:56:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:11,959 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:56:11,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:56:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:11,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:11,960 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:12,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2020-10-15 16:56:12,160 INFO L429 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 375 times [2020-10-15 16:56:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:12,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197090419] [2020-10-15 16:56:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:13,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197090419] [2020-10-15 16:56:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249929238] [2020-10-15 16:56:13,149 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:13,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:56:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:13,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:13,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:56:13,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161387753] [2020-10-15 16:56:13,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:56:13,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:13,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:56:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:56:13,260 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:56:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:16,397 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-15 16:56:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 16:56:16,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:56:16,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:16,401 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:56:16,401 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:56:16,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1304, Invalid=3666, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 16:56:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:56:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2020-10-15 16:56:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:56:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:56:16,405 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:56:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:16,405 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:56:16,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:56:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:56:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:16,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:16,406 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:16,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2020-10-15 16:56:16,614 INFO L429 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash 660093321, now seen corresponding path program 376 times [2020-10-15 16:56:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:16,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362803151] [2020-10-15 16:56:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:17,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362803151] [2020-10-15 16:56:17,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096217788] [2020-10-15 16:56:17,620 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:17,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:56:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:17,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:17,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:17,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:17,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:17,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:56:17,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925194665] [2020-10-15 16:56:17,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:17,783 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:56:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:21,682 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-10-15 16:56:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 16:56:21,684 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:56:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:21,685 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:56:21,685 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 16:56:21,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1412, Invalid=3990, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 16:56:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 16:56:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-10-15 16:56:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:56:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:56:21,688 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:56:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:21,688 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:56:21,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:56:21,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:21,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:21,689 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:21,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2020-10-15 16:56:21,889 INFO L429 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 377 times [2020-10-15 16:56:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:21,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964312105] [2020-10-15 16:56:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964312105] [2020-10-15 16:56:22,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68655728] [2020-10-15 16:56:22,883 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:22,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 16:56:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:22,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:22,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:22,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:56:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373033765] [2020-10-15 16:56:23,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:56:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:56:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:56:23,004 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:56:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:26,392 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 16:56:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 16:56:26,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:56:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:26,396 INFO L225 Difference]: With dead ends: 140 [2020-10-15 16:56:26,396 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 16:56:26,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1415, Invalid=3841, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 16:56:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 16:56:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-15 16:56:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:56:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:56:26,399 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:56:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:26,399 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:56:26,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:56:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:56:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:26,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:26,399 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:26,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2020-10-15 16:56:26,600 INFO L429 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 299823979, now seen corresponding path program 378 times [2020-10-15 16:56:26,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:26,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54280758] [2020-10-15 16:56:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54280758] [2020-10-15 16:56:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645983191] [2020-10-15 16:56:27,658 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:27,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 16:56:27,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:27,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:27,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:27,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:56:27,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548891916] [2020-10-15 16:56:27,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:27,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:27,836 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:56:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:31,929 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2020-10-15 16:56:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 16:56:31,932 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:56:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:31,933 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:56:31,933 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:56:31,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1530, Invalid=4170, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 16:56:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:56:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2020-10-15 16:56:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:56:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:56:31,936 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:56:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:31,936 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:56:31,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:56:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:31,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:31,936 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:32,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2020-10-15 16:56:32,137 INFO L429 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 379 times [2020-10-15 16:56:32,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:32,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489896567] [2020-10-15 16:56:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489896567] [2020-10-15 16:56:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019682628] [2020-10-15 16:56:33,077 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:33,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:33,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:56:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301116436] [2020-10-15 16:56:33,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:56:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:56:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:56:33,187 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 16:56:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:36,590 INFO L93 Difference]: Finished difference Result 136 states and 335 transitions. [2020-10-15 16:56:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 16:56:36,593 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 16:56:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:36,593 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:56:36,593 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:56:36,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4008, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 16:56:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:56:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-15 16:56:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 16:56:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 16:56:36,596 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 16:56:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:36,596 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 16:56:36,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 16:56:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 16:56:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:36,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:36,596 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:36,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:36,797 INFO L429 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1859207731, now seen corresponding path program 380 times [2020-10-15 16:56:36,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:36,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148494129] [2020-10-15 16:56:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148494129] [2020-10-15 16:56:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362229566] [2020-10-15 16:56:37,747 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:37,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:56:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:37,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:56:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:37,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:37,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 16:56:37,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614571416] [2020-10-15 16:56:37,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 16:56:37,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:37,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 16:56:37,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:56:37,913 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 16:56:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:56:42,194 INFO L93 Difference]: Finished difference Result 135 states and 333 transitions. [2020-10-15 16:56:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 16:56:42,198 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 16:56:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:56:42,198 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:56:42,198 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:56:42,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1664, Invalid=4342, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 16:56:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:56:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:56:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:56:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 16:56:42,201 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 16:56:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:56:42,201 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 16:56:42,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 16:56:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 16:56:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 16:56:42,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:56:42,201 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:56:42,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:42,402 INFO L429 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:56:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:56:42,403 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 381 times [2020-10-15 16:56:42,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:56:42,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671719482] [2020-10-15 16:56:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:56:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:56:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671719482] [2020-10-15 16:56:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178310586] [2020-10-15 16:56:43,424 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:43,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 16:56:43,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:56:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 16:56:43,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:56:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:56:43,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:56:43,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 16:56:43,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813270747] [2020-10-15 16:56:43,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 16:56:43,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:56:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 16:56:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:56:43,548 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. Received shutdown request... [2020-10-15 16:56:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:56:46,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:56:46,192 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:56:46,196 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:56:46,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:56:46 BasicIcfg [2020-10-15 16:56:46,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:56:46,199 INFO L168 Benchmark]: Toolchain (without parser) took 847945.03 ms. Allocated memory was 244.8 MB in the beginning and 205.0 MB in the end (delta: -39.8 MB). Free memory was 200.2 MB in the beginning and 132.0 MB in the end (delta: 68.2 MB). Peak memory consumption was 28.4 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:46,199 INFO L168 Benchmark]: CDTParser took 1.29 ms. Allocated memory is still 244.8 MB. Free memory is still 221.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:56:46,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.57 ms. Allocated memory was 244.8 MB in the beginning and 297.3 MB in the end (delta: 52.4 MB). Free memory was 200.2 MB in the beginning and 252.7 MB in the end (delta: -52.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:46,200 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.15 ms. Allocated memory is still 297.3 MB. Free memory is still 252.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:56:46,200 INFO L168 Benchmark]: Boogie Preprocessor took 28.07 ms. Allocated memory is still 297.3 MB. Free memory was 252.7 MB in the beginning and 250.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:46,201 INFO L168 Benchmark]: RCFGBuilder took 390.05 ms. Allocated memory is still 297.3 MB. Free memory was 250.2 MB in the beginning and 228.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:46,201 INFO L168 Benchmark]: TraceAbstraction took 846813.97 ms. Allocated memory was 297.3 MB in the beginning and 205.0 MB in the end (delta: -92.3 MB). Free memory was 228.4 MB in the beginning and 132.0 MB in the end (delta: 96.4 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:56:46,208 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 244.8 MB. Free memory is still 221.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 661.57 ms. Allocated memory was 244.8 MB in the beginning and 297.3 MB in the end (delta: 52.4 MB). Free memory was 200.2 MB in the beginning and 252.7 MB in the end (delta: -52.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.15 ms. Allocated memory is still 297.3 MB. Free memory is still 252.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.07 ms. Allocated memory is still 297.3 MB. Free memory was 252.7 MB in the beginning and 250.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 390.05 ms. Allocated memory is still 297.3 MB. Free memory was 250.2 MB in the beginning and 228.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 846813.97 ms. Allocated memory was 297.3 MB in the beginning and 205.0 MB in the end (delta: -92.3 MB). Free memory was 228.4 MB in the beginning and 132.0 MB in the end (delta: 96.4 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (110states) and FLOYD_HOARE automaton (currently 36 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 64 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 846.6s, OverallIterations: 383, TraceHistogramMax: 13, AutomataDifference: 553.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 6161 SDtfs, 25834 SDslu, 46268 SDs, 0 SdLazy, 52076 SolverSat, 36479 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26858 GetRequests, 8624 SyntacticMatches, 378 SemanticMatches, 17855 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234607 ImplicationChecksByTransitivity, 607.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 382 MinimizatonAttempts, 11926 StatesRemovedByMinimization, 381 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.1s SsaConstructionTime, 9.8s SatisfiabilityAnalysisTime, 188.5s InterpolantComputationTime, 19204 NumberOfCodeBlocks, 19204 NumberOfCodeBlocksAsserted, 2385 NumberOfCheckSat, 18443 ConstructedInterpolants, 0 QuantifiedInterpolants, 2216487 SizeOfPredicates, 6556 NumberOfNonLiveVariables, 56972 ConjunctsInSsa, 8074 ConjunctsInUnsatCore, 761 InterpolantComputations, 5 PerfectInterpolantSequences, 0/57668 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