/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 23:02:06,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 23:02:06,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 23:02:06,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 23:02:06,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 23:02:06,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 23:02:06,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 23:02:06,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 23:02:06,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 23:02:06,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 23:02:06,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 23:02:06,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 23:02:06,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 23:02:06,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 23:02:06,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 23:02:06,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 23:02:06,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 23:02:06,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 23:02:06,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 23:02:06,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 23:02:06,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 23:02:06,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 23:02:06,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 23:02:06,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 23:02:06,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 23:02:06,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 23:02:06,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 23:02:06,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 23:02:06,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 23:02:06,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 23:02:06,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 23:02:06,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 23:02:06,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 23:02:06,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 23:02:06,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 23:02:06,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 23:02:06,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 23:02:06,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 23:02:06,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 23:02:06,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 23:02:06,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 23:02:06,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 23:02:06,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 23:02:06,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 23:02:06,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 23:02:06,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 23:02:06,985 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 23:02:06,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 23:02:06,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 23:02:06,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 23:02:06,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 23:02:06,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 23:02:06,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 23:02:06,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 23:02:06,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 23:02:06,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 23:02:06,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 23:02:06,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 23:02:06,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 23:02:06,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 23:02:06,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 23:02:06,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 23:02:06,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 23:02:06,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 23:02:06,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 23:02:06,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 23:02:06,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 23:02:06,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 23:02:06,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 23:02:06,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 23:02:06,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 23:02:06,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 23:02:07,268 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 23:02:07,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 23:02:07,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 23:02:07,289 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 23:02:07,290 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 23:02:07,291 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-04-17 23:02:07,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185d19f08/2e26eb8d07484f6583b7bd476d205dd0/FLAG7a9ce5281 [2020-04-17 23:02:07,926 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 23:02:07,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-04-17 23:02:07,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185d19f08/2e26eb8d07484f6583b7bd476d205dd0/FLAG7a9ce5281 [2020-04-17 23:02:08,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185d19f08/2e26eb8d07484f6583b7bd476d205dd0 [2020-04-17 23:02:08,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 23:02:08,255 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 23:02:08,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 23:02:08,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 23:02:08,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 23:02:08,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:08,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bc65ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08, skipping insertion in model container [2020-04-17 23:02:08,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:08,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 23:02:08,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 23:02:08,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:02:08,852 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 23:02:08,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:02:08,989 INFO L208 MainTranslator]: Completed translation [2020-04-17 23:02:08,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08 WrapperNode [2020-04-17 23:02:08,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 23:02:08,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 23:02:08,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 23:02:08,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 23:02:09,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 23:02:09,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 23:02:09,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 23:02:09,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 23:02:09,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (1/1) ... [2020-04-17 23:02:09,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 23:02:09,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 23:02:09,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 23:02:09,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 23:02:09,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (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 [2020-04-17 23:02:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 23:02:09,142 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 23:02:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 23:02:09,143 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 23:02:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 23:02:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 23:02:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 23:02:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 23:02:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 23:02:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 23:02:09,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 23:02:09,146 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 23:02:09,500 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 23:02:09,500 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 23:02:09,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:02:09 BoogieIcfgContainer [2020-04-17 23:02:09,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 23:02:09,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 23:02:09,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 23:02:09,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 23:02:09,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 11:02:08" (1/3) ... [2020-04-17 23:02:09,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bc74c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:02:09, skipping insertion in model container [2020-04-17 23:02:09,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:08" (2/3) ... [2020-04-17 23:02:09,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bc74c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:02:09, skipping insertion in model container [2020-04-17 23:02:09,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:02:09" (3/3) ... [2020-04-17 23:02:09,513 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-04-17 23:02:09,522 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 23:02:09,522 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 23:02:09,528 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 23:02:09,529 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 23:02:09,555 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,557 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,557 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,558 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,559 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,559 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,559 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,559 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,560 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,560 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,560 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,561 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,561 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,564 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,565 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,565 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,565 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,566 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,566 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,568 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,571 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,572 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,572 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,574 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,575 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,575 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,575 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,575 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,579 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,579 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,580 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,580 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,580 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,580 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,586 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,587 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,587 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,587 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,587 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,588 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:09,610 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 23:02:09,627 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 23:02:09,627 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 23:02:09,628 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 23:02:09,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 23:02:09,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 23:02:09,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 23:02:09,628 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 23:02:09,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 23:02:09,642 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:09,644 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:09,680 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 23:02:09,680 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 23:02:09,689 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. [2020-04-17 23:02:09,691 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:09,715 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 23:02:09,715 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 23:02:09,716 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. [2020-04-17 23:02:09,719 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 23:02:09,721 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 23:02:10,761 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 23:02:10,989 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 23:02:10,989 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 23:02:10,993 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 23:02:11,004 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 23:02:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 23:02:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 23:02:11,014 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,015 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 23:02:11,015 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 23:02:11,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:11,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834026456] [2020-04-17 23:02:11,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834026456] [2020-04-17 23:02:11,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:11,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 23:02:11,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249694883] [2020-04-17 23:02:11,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 23:02:11,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 23:02:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 23:02:11,372 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 23:02:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:11,447 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 23:02:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 23:02:11,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 23:02:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:11,460 INFO L225 Difference]: With dead ends: 75 [2020-04-17 23:02:11,461 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 23:02:11,463 INFO L678 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 [2020-04-17 23:02:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 23:02:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 23:02:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 23:02:11,513 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 23:02:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:11,513 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 23:02:11,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 23:02:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 23:02:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 23:02:11,519 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,519 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:11,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 23:02:11,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:11,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110248984] [2020-04-17 23:02:11,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110248984] [2020-04-17 23:02:11,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:11,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 23:02:11,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45924141] [2020-04-17 23:02:11,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 23:02:11,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 23:02:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 23:02:11,646 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 23:02:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:11,682 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 23:02:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 23:02:11,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 23:02:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:11,684 INFO L225 Difference]: With dead ends: 56 [2020-04-17 23:02:11,684 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:11,685 INFO L678 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 [2020-04-17 23:02:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 23:02:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 23:02:11,693 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 23:02:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:11,694 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 23:02:11,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 23:02:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 23:02:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:11,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,695 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:11,695 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:11,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 23:02:11,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:11,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452170379] [2020-04-17 23:02:11,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452170379] [2020-04-17 23:02:11,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:11,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:11,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322749357] [2020-04-17 23:02:11,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:11,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:11,767 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 23:02:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:11,852 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 23:02:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:11,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:11,854 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:11,855 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:11,855 INFO L678 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 [2020-04-17 23:02:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 23:02:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:11,864 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 23:02:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:11,864 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:11,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:11,866 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,866 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:11,866 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 23:02:11,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:11,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271951702] [2020-04-17 23:02:11,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271951702] [2020-04-17 23:02:11,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:11,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:11,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222328182] [2020-04-17 23:02:11,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:11,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:11,943 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 23:02:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:12,025 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 23:02:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:02:12,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:12,026 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:12,027 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 23:02:12,027 INFO L678 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 [2020-04-17 23:02:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 23:02:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 23:02:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 23:02:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 23:02:12,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 23:02:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:12,033 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 23:02:12,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 23:02:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:12,034 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:12,034 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:12,034 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 23:02:12,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:12,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748827221] [2020-04-17 23:02:12,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748827221] [2020-04-17 23:02:12,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:12,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:12,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650346219] [2020-04-17 23:02:12,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:12,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:12,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:12,128 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 23:02:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:12,200 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 23:02:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:02:12,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:12,203 INFO L225 Difference]: With dead ends: 57 [2020-04-17 23:02:12,203 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 23:02:12,204 INFO L678 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 [2020-04-17 23:02:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 23:02:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 23:02:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 23:02:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 23:02:12,209 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 23:02:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:12,210 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 23:02:12,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 23:02:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:12,211 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:12,211 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:12,211 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:12,212 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 23:02:12,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:12,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311748605] [2020-04-17 23:02:12,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311748605] [2020-04-17 23:02:12,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26024782] [2020-04-17 23:02:12,301 INFO L92 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 [2020-04-17 23:02:12,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:12,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:12,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:12,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:12,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:12,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:12,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235306702] [2020-04-17 23:02:12,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:12,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:12,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:12,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:12,419 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 23:02:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:12,526 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 23:02:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:12,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:12,528 INFO L225 Difference]: With dead ends: 48 [2020-04-17 23:02:12,528 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 23:02:12,528 INFO L678 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 [2020-04-17 23:02:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 23:02:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 23:02:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 23:02:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 23:02:12,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 23:02:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:12,534 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 23:02:12,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 23:02:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:12,535 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:12,535 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:12,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:12,738 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 23:02:12,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:12,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790829922] [2020-04-17 23:02:12,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790829922] [2020-04-17 23:02:12,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520703944] [2020-04-17 23:02:12,825 INFO L92 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 [2020-04-17 23:02:12,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:12,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:12,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:12,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:12,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 23:02:12,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314833336] [2020-04-17 23:02:12,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:02:12,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:02:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:02:12,917 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 23:02:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,008 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 23:02:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:13,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 23:02:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,010 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:13,010 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 23:02:13,011 INFO L678 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 [2020-04-17 23:02:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 23:02:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 23:02:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 23:02:13,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 23:02:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,019 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 23:02:13,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:02:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 23:02:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:13,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,022 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:13,228 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 23:02:13,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638685926] [2020-04-17 23:02:13,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638685926] [2020-04-17 23:02:13,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333727817] [2020-04-17 23:02:13,316 INFO L92 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 [2020-04-17 23:02:13,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 23:02:13,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:13,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:13,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:13,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:13,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:13,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085936545] [2020-04-17 23:02:13,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:13,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:13,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:13,391 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 23:02:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,523 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 23:02:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 23:02:13,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,524 INFO L225 Difference]: With dead ends: 58 [2020-04-17 23:02:13,524 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 23:02:13,525 INFO L678 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 [2020-04-17 23:02:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 23:02:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 23:02:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 23:02:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 23:02:13,530 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 23:02:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,530 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 23:02:13,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 23:02:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:13,531 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,531 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:13,735 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 23:02:13,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714488916] [2020-04-17 23:02:13,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714488916] [2020-04-17 23:02:13,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879723256] [2020-04-17 23:02:13,839 INFO L92 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 [2020-04-17 23:02:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:13,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:13,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 23:02:13,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56690021] [2020-04-17 23:02:13,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:02:13,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:02:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:02:13,895 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 23:02:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,090 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 23:02:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:14,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 23:02:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,091 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:14,091 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:14,092 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 23:02:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 23:02:14,098 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 23:02:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,098 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 23:02:14,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:02:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 23:02:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:14,099 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,099 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:14,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:14,310 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 23:02:14,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:14,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835008075] [2020-04-17 23:02:14,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:14,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835008075] [2020-04-17 23:02:14,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539079527] [2020-04-17 23:02:14,367 INFO L92 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 [2020-04-17 23:02:14,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:14,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:14,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:14,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:14,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:14,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:14,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673366440] [2020-04-17 23:02:14,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:14,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:14,446 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 23:02:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,644 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 23:02:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:14,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,645 INFO L225 Difference]: With dead ends: 62 [2020-04-17 23:02:14,646 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:14,646 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 23:02:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 23:02:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 23:02:14,654 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 23:02:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,655 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 23:02:14,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 23:02:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:14,655 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,656 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:14,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:14,863 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 23:02:14,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:14,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817359516] [2020-04-17 23:02:14,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:14,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817359516] [2020-04-17 23:02:14,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15372401] [2020-04-17 23:02:14,954 INFO L92 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 [2020-04-17 23:02:15,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 23:02:15,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:15,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:15,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:15,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:15,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 23:02:15,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119253524] [2020-04-17 23:02:15,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:15,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:15,040 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 23:02:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:15,154 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 23:02:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:02:15,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 23:02:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:15,155 INFO L225 Difference]: With dead ends: 64 [2020-04-17 23:02:15,156 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 23:02:15,156 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 23:02:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 23:02:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 23:02:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 23:02:15,161 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 23:02:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:15,161 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 23:02:15,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 23:02:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:15,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:15,162 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:15,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,371 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 23:02:15,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:15,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380009163] [2020-04-17 23:02:15,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:15,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380009163] [2020-04-17 23:02:15,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290007653] [2020-04-17 23:02:15,457 INFO L92 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 [2020-04-17 23:02:15,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:15,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:15,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:15,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:15,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:15,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:15,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:15,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813445376] [2020-04-17 23:02:15,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:15,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:15,555 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 23:02:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:15,732 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 23:02:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:15,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:15,733 INFO L225 Difference]: With dead ends: 61 [2020-04-17 23:02:15,733 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:15,733 INFO L678 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 [2020-04-17 23:02:15,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 23:02:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 23:02:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 23:02:15,737 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 23:02:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:15,737 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 23:02:15,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 23:02:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:15,738 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:15,738 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:15,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,939 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 23:02:15,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:15,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774840943] [2020-04-17 23:02:15,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774840943] [2020-04-17 23:02:16,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230303903] [2020-04-17 23:02:16,003 INFO L92 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 [2020-04-17 23:02:16,064 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:16,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:16,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:16,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:16,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 23:02:16,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653535540] [2020-04-17 23:02:16,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:16,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:16,084 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 23:02:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:16,239 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 23:02:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:16,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 23:02:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:16,240 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:16,240 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:16,241 INFO L678 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 [2020-04-17 23:02:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 23:02:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 23:02:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 23:02:16,246 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 23:02:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:16,247 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 23:02:16,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 23:02:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:16,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:16,248 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:16,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:16,458 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 23:02:16,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:16,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023235412] [2020-04-17 23:02:16,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023235412] [2020-04-17 23:02:16,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290511135] [2020-04-17 23:02:16,543 INFO L92 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 [2020-04-17 23:02:16,606 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 23:02:16,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:16,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:16,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:16,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:16,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:16,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212152382] [2020-04-17 23:02:16,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:16,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:16,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:16,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:16,642 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 23:02:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:16,881 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-04-17 23:02:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:16,881 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:16,882 INFO L225 Difference]: With dead ends: 58 [2020-04-17 23:02:16,882 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:16,883 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-04-17 23:02:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 23:02:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 23:02:16,886 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 23:02:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:16,887 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 23:02:16,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 23:02:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:16,888 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:16,888 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:17,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,095 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 23:02:17,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:17,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361693368] [2020-04-17 23:02:17,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361693368] [2020-04-17 23:02:17,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252110287] [2020-04-17 23:02:17,164 INFO L92 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 [2020-04-17 23:02:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:17,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:17,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:17,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:17,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258442422] [2020-04-17 23:02:17,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:17,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:17,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:17,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:17,251 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 23:02:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:17,411 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 23:02:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:17,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:17,412 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:17,412 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:17,413 INFO L678 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 [2020-04-17 23:02:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 23:02:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:17,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 23:02:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:17,416 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:17,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:17,417 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:17,417 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:17,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,623 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:17,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 23:02:17,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:17,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434401892] [2020-04-17 23:02:17,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434401892] [2020-04-17 23:02:17,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994129373] [2020-04-17 23:02:17,714 INFO L92 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 [2020-04-17 23:02:17,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:17,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:17,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:17,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:17,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:17,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:17,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413888344] [2020-04-17 23:02:17,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:17,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:17,805 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 23:02:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:18,000 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 23:02:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:18,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:18,005 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:18,005 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 23:02:18,006 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 23:02:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 23:02:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 23:02:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 23:02:18,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 23:02:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:18,009 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 23:02:18,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 23:02:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:18,010 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:18,010 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,214 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 23:02:18,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191050457] [2020-04-17 23:02:18,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191050457] [2020-04-17 23:02:18,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965059970] [2020-04-17 23:02:18,311 INFO L92 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 [2020-04-17 23:02:18,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:18,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:18,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:18,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:18,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:18,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838214270] [2020-04-17 23:02:18,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:18,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:18,405 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 23:02:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:18,510 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 23:02:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:02:18,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:18,512 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:18,512 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:18,512 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 23:02:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 23:02:18,516 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 23:02:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:18,517 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 23:02:18,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 23:02:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:18,518 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:18,518 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,723 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,724 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 23:02:18,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822516370] [2020-04-17 23:02:18,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822516370] [2020-04-17 23:02:18,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475765270] [2020-04-17 23:02:18,827 INFO L92 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 [2020-04-17 23:02:18,887 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:18,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:18,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:18,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:18,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:18,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:18,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032614201] [2020-04-17 23:02:18,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:18,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:18,914 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 23:02:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:19,050 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 23:02:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:19,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:19,051 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:19,051 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:19,052 INFO L678 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 [2020-04-17 23:02:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 23:02:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 23:02:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 23:02:19,055 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 23:02:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:19,055 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 23:02:19,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 23:02:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:19,056 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:19,056 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:19,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,260 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 23:02:19,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:19,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14224766] [2020-04-17 23:02:19,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14224766] [2020-04-17 23:02:19,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129104450] [2020-04-17 23:02:19,341 INFO L92 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 [2020-04-17 23:02:19,391 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:19,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:19,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:19,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:19,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:19,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508252279] [2020-04-17 23:02:19,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:19,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:19,403 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 23:02:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:19,568 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 23:02:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:19,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:19,570 INFO L225 Difference]: With dead ends: 67 [2020-04-17 23:02:19,570 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:19,571 INFO L678 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 [2020-04-17 23:02:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 23:02:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 23:02:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 23:02:19,574 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 23:02:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:19,574 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 23:02:19,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 23:02:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:19,575 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:19,575 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:19,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,783 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 23:02:19,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:19,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765395491] [2020-04-17 23:02:19,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765395491] [2020-04-17 23:02:19,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142820390] [2020-04-17 23:02:19,849 INFO L92 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 [2020-04-17 23:02:19,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:02:19,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:19,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:19,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:19,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:19,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:19,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477061280] [2020-04-17 23:02:19,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:19,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:19,924 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 23:02:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:20,149 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 23:02:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:20,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:20,150 INFO L225 Difference]: With dead ends: 69 [2020-04-17 23:02:20,150 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 23:02:20,150 INFO L678 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 [2020-04-17 23:02:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 23:02:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 23:02:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:20,155 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 23:02:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:20,155 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:20,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:20,156 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:20,156 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:20,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:20,364 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 23:02:20,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:20,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882866949] [2020-04-17 23:02:20,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:20,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882866949] [2020-04-17 23:02:20,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038243491] [2020-04-17 23:02:20,435 INFO L92 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 [2020-04-17 23:02:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:20,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:20,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:20,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:20,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:20,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834515277] [2020-04-17 23:02:20,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:20,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:20,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:20,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:20,504 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 23:02:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:20,711 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 23:02:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:20,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:20,715 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:02:20,715 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 23:02:20,715 INFO L678 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 [2020-04-17 23:02:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 23:02:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 23:02:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 23:02:20,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 23:02:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:20,720 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 23:02:20,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 23:02:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:20,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:20,721 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:20,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:20,925 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 23:02:20,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:20,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915416220] [2020-04-17 23:02:20,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:20,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915416220] [2020-04-17 23:02:20,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144638690] [2020-04-17 23:02:20,983 INFO L92 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 [2020-04-17 23:02:21,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:21,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:21,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:21,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:21,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:21,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111680508] [2020-04-17 23:02:21,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:21,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:21,074 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 23:02:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:21,323 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 23:02:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:21,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:21,325 INFO L225 Difference]: With dead ends: 69 [2020-04-17 23:02:21,325 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:21,325 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 23:02:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 23:02:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 23:02:21,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 23:02:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:21,329 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 23:02:21,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 23:02:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:21,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:21,330 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:21,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,534 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 23:02:21,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:21,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728055952] [2020-04-17 23:02:21,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728055952] [2020-04-17 23:02:21,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849005083] [2020-04-17 23:02:21,609 INFO L92 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 [2020-04-17 23:02:21,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:21,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:21,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:21,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:21,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:21,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102365763] [2020-04-17 23:02:21,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:21,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:21,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:21,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:21,672 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 23:02:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:21,818 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 23:02:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:21,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:21,820 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:21,820 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:21,820 INFO L678 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 [2020-04-17 23:02:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 23:02:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:21,824 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 23:02:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:21,824 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:21,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:21,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:21,825 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:21,825 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:22,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,029 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 23:02:22,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:22,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118307039] [2020-04-17 23:02:22,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118307039] [2020-04-17 23:02:22,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132924559] [2020-04-17 23:02:22,117 INFO L92 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 [2020-04-17 23:02:22,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:22,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:22,166 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:22,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:22,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:22,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:22,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225019583] [2020-04-17 23:02:22,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:22,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:22,196 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 23:02:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:22,421 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 23:02:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:22,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:22,423 INFO L225 Difference]: With dead ends: 71 [2020-04-17 23:02:22,423 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 23:02:22,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 23:02:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 23:02:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:22,427 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 23:02:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:22,427 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:22,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:22,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:22,428 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:22,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,629 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 23:02:22,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:22,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643788703] [2020-04-17 23:02:22,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643788703] [2020-04-17 23:02:22,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133333894] [2020-04-17 23:02:22,692 INFO L92 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 [2020-04-17 23:02:22,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:22,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:22,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:22,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:22,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:22,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261188141] [2020-04-17 23:02:22,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:22,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:22,776 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 23:02:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:22,949 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 23:02:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:22,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:22,951 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:22,951 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 23:02:22,952 INFO L678 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 [2020-04-17 23:02:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 23:02:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 23:02:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:22,955 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 23:02:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:22,956 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:22,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:22,956 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:22,956 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:23,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:23,160 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:23,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 23:02:23,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:23,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166394765] [2020-04-17 23:02:23,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166394765] [2020-04-17 23:02:23,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983790588] [2020-04-17 23:02:23,239 INFO L92 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 [2020-04-17 23:02:23,289 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:02:23,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:23,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:23,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:23,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:23,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:23,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519326828] [2020-04-17 23:02:23,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:23,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:23,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:23,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:23,329 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 23:02:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:23,587 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 23:02:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:23,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:23,589 INFO L225 Difference]: With dead ends: 67 [2020-04-17 23:02:23,589 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:23,589 INFO L678 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 [2020-04-17 23:02:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 23:02:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:23,594 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 23:02:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:23,594 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:23,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:23,595 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:23,595 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:23,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:23,796 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 23:02:23,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:23,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784673022] [2020-04-17 23:02:23,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784673022] [2020-04-17 23:02:23,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851441177] [2020-04-17 23:02:23,937 INFO L92 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 [2020-04-17 23:02:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:23,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:23,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:23,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:23,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660285329] [2020-04-17 23:02:23,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:23,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:23,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:23,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:23,997 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 23:02:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:24,234 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 23:02:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:24,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:24,236 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:24,236 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:24,237 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 23:02:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 23:02:24,240 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 23:02:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:24,240 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 23:02:24,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 23:02:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:24,240 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:24,240 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:24,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,444 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:24,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 23:02:24,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:24,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167493656] [2020-04-17 23:02:24,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167493656] [2020-04-17 23:02:24,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905121338] [2020-04-17 23:02:24,523 INFO L92 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 [2020-04-17 23:02:24,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:24,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:24,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:24,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510557680] [2020-04-17 23:02:24,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:24,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:24,607 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 23:02:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:24,854 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-04-17 23:02:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:24,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:24,856 INFO L225 Difference]: With dead ends: 62 [2020-04-17 23:02:24,856 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:24,857 INFO L678 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 [2020-04-17 23:02:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-04-17 23:02:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 23:02:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 23:02:24,859 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 23:02:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:24,859 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 23:02:24,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 23:02:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:24,860 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:24,860 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:25,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,063 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 23:02:25,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:25,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689999441] [2020-04-17 23:02:25,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689999441] [2020-04-17 23:02:25,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258081921] [2020-04-17 23:02:25,126 INFO L92 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 [2020-04-17 23:02:25,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:25,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:25,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:25,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:25,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:25,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964004708] [2020-04-17 23:02:25,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:25,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:25,203 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 23:02:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:25,471 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 23:02:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:25,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:25,473 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:25,473 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 23:02:25,474 INFO L678 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 [2020-04-17 23:02:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 23:02:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 23:02:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 23:02:25,476 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 23:02:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:25,477 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 23:02:25,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 23:02:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:25,477 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:25,477 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:25,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,681 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 23:02:25,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:25,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043273730] [2020-04-17 23:02:25,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043273730] [2020-04-17 23:02:25,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656197983] [2020-04-17 23:02:25,757 INFO L92 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 [2020-04-17 23:02:25,807 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:25,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:25,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:25,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:25,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:25,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505240888] [2020-04-17 23:02:25,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:25,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:25,848 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 23:02:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:26,128 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 23:02:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:26,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:26,130 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:26,130 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:26,131 INFO L678 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 [2020-04-17 23:02:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 23:02:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 23:02:26,134 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 23:02:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:26,135 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 23:02:26,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 23:02:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:26,135 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:26,135 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,339 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 23:02:26,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311314202] [2020-04-17 23:02:26,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311314202] [2020-04-17 23:02:26,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611887600] [2020-04-17 23:02:26,444 INFO L92 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 [2020-04-17 23:02:26,490 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:26,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:26,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:26,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:26,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:26,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119860581] [2020-04-17 23:02:26,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:26,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:26,500 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 23:02:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:26,646 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 23:02:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:26,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:26,647 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:26,647 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:26,648 INFO L678 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 [2020-04-17 23:02:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 23:02:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 23:02:26,652 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 23:02:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:26,652 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 23:02:26,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 23:02:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:26,652 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:26,652 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,855 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 23:02:26,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203176993] [2020-04-17 23:02:26,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203176993] [2020-04-17 23:02:26,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519175553] [2020-04-17 23:02:26,940 INFO L92 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 [2020-04-17 23:02:26,995 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:26,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:26,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:26,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:27,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:27,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:27,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:27,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936957096] [2020-04-17 23:02:27,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:27,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:27,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:27,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:27,033 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 23:02:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:27,231 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 23:02:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:27,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:27,233 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:27,233 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:27,233 INFO L678 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 [2020-04-17 23:02:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 23:02:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 23:02:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 23:02:27,236 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 23:02:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:27,237 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 23:02:27,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 23:02:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:27,237 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:27,238 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:27,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:27,441 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 23:02:27,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:27,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759769145] [2020-04-17 23:02:27,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:27,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759769145] [2020-04-17 23:02:27,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444121473] [2020-04-17 23:02:27,520 INFO L92 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 [2020-04-17 23:02:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:27,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:27,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:27,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:27,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:27,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700464639] [2020-04-17 23:02:27,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:27,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:27,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:27,576 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 23:02:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:27,794 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 23:02:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:27,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:27,795 INFO L225 Difference]: With dead ends: 75 [2020-04-17 23:02:27,795 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 23:02:27,796 INFO L678 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 [2020-04-17 23:02:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 23:02:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 23:02:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:27,799 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 23:02:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:27,799 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:27,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:27,799 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:27,799 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:28,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,003 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 23:02:28,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:28,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051144655] [2020-04-17 23:02:28,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051144655] [2020-04-17 23:02:28,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194393461] [2020-04-17 23:02:28,087 INFO L92 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 [2020-04-17 23:02:28,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:28,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:28,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:28,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:28,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:28,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:28,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691491708] [2020-04-17 23:02:28,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:28,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:28,152 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 23:02:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:28,423 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 23:02:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:28,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:28,429 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:28,429 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:28,430 INFO L678 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 [2020-04-17 23:02:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 23:02:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:28,432 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 23:02:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:28,433 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:28,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:28,433 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:28,433 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:28,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,637 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 23:02:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:28,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334160418] [2020-04-17 23:02:28,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334160418] [2020-04-17 23:02:28,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700949696] [2020-04-17 23:02:28,755 INFO L92 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 [2020-04-17 23:02:28,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:28,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:28,825 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:28,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:28,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:28,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709252585] [2020-04-17 23:02:28,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:28,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:28,855 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 23:02:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:29,090 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 23:02:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:29,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:29,091 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:29,091 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:29,092 INFO L678 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 [2020-04-17 23:02:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 23:02:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 23:02:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 23:02:29,094 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 23:02:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:29,095 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 23:02:29,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 23:02:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:29,095 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:29,095 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:29,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:29,296 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 23:02:29,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:29,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082828404] [2020-04-17 23:02:29,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:29,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082828404] [2020-04-17 23:02:29,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584182183] [2020-04-17 23:02:29,367 INFO L92 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 [2020-04-17 23:02:29,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:29,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:29,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:29,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:29,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:29,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:29,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:29,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179832479] [2020-04-17 23:02:29,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:29,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:29,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:29,442 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 23:02:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:29,766 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 23:02:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:29,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:29,767 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:29,767 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 23:02:29,767 INFO L678 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 [2020-04-17 23:02:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 23:02:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 23:02:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 23:02:29,770 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 23:02:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:29,770 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 23:02:29,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 23:02:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:29,771 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:29,771 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:29,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:29,974 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 23:02:29,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:29,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021522959] [2020-04-17 23:02:29,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:30,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021522959] [2020-04-17 23:02:30,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22754885] [2020-04-17 23:02:30,057 INFO L92 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 [2020-04-17 23:02:30,110 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:30,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:30,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:30,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:30,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:30,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:30,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357012310] [2020-04-17 23:02:30,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:30,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:30,132 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 23:02:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:30,407 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 23:02:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:30,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:30,408 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:02:30,408 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:02:30,409 INFO L678 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 [2020-04-17 23:02:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:02:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 23:02:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 23:02:30,413 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 23:02:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:30,414 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 23:02:30,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 23:02:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:30,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:30,414 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:30,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:30,618 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 23:02:30,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:30,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120163030] [2020-04-17 23:02:30,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:30,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120163030] [2020-04-17 23:02:30,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765555118] [2020-04-17 23:02:30,711 INFO L92 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 [2020-04-17 23:02:30,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:30,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:30,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:30,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:30,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:30,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:30,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:30,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660976408] [2020-04-17 23:02:30,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:30,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:30,786 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 23:02:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:31,147 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 23:02:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:31,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:31,148 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:31,148 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 23:02:31,149 INFO L678 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 [2020-04-17 23:02:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 23:02:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 23:02:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 23:02:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 23:02:31,152 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 23:02:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:31,153 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 23:02:31,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 23:02:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:31,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:31,153 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:31,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:31,357 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 23:02:31,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:31,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888534593] [2020-04-17 23:02:31,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:31,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888534593] [2020-04-17 23:02:31,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633004082] [2020-04-17 23:02:31,465 INFO L92 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 [2020-04-17 23:02:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:31,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:31,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:31,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:31,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:31,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860572013] [2020-04-17 23:02:31,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:31,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:31,535 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 23:02:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:31,707 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 23:02:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:31,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:31,708 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:31,708 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:31,709 INFO L678 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 [2020-04-17 23:02:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 23:02:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:31,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:31,712 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:31,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:31,712 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:31,713 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:31,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:31,917 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 23:02:31,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:31,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833074486] [2020-04-17 23:02:31,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833074486] [2020-04-17 23:02:32,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795228187] [2020-04-17 23:02:32,031 INFO L92 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 [2020-04-17 23:02:32,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:32,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:32,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:32,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:32,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:32,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:32,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179978255] [2020-04-17 23:02:32,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:32,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:32,106 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:32,353 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 23:02:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:32,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:32,354 INFO L225 Difference]: With dead ends: 81 [2020-04-17 23:02:32,354 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 23:02:32,354 INFO L678 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 [2020-04-17 23:02:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 23:02:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 23:02:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:32,357 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:32,358 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:32,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:32,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:32,359 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:32,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:32,559 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 23:02:32,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:32,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424428743] [2020-04-17 23:02:32,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424428743] [2020-04-17 23:02:32,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848283503] [2020-04-17 23:02:32,649 INFO L92 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 [2020-04-17 23:02:32,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:32,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:32,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:32,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:32,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:32,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173843582] [2020-04-17 23:02:32,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:32,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:32,718 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:32,941 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 23:02:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:32,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:32,943 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:32,943 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:32,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:02:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 23:02:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:32,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:32,948 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:32,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:32,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:32,948 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:33,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,152 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 23:02:33,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:33,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646133716] [2020-04-17 23:02:33,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646133716] [2020-04-17 23:02:33,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356943948] [2020-04-17 23:02:33,247 INFO L92 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 [2020-04-17 23:02:33,290 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:33,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:33,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:33,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:33,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:33,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:33,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560789314] [2020-04-17 23:02:33,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:33,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:33,311 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:33,616 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 23:02:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:33,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:33,617 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:33,617 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:33,618 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:02:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 23:02:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:33,621 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:33,621 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:33,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:33,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:33,621 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:33,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,822 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 23:02:33,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:33,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776757410] [2020-04-17 23:02:33,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776757410] [2020-04-17 23:02:33,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325729112] [2020-04-17 23:02:33,902 INFO L92 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 [2020-04-17 23:02:33,947 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:33,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:33,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:33,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:33,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:33,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837629013] [2020-04-17 23:02:33,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:33,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:33,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:33,965 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:34,245 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 23:02:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:34,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:34,247 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:34,247 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:34,247 INFO L678 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 [2020-04-17 23:02:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 23:02:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:34,251 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:34,251 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:34,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:34,252 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:34,252 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:34,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:34,456 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 23:02:34,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:34,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151503387] [2020-04-17 23:02:34,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:34,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151503387] [2020-04-17 23:02:34,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035606320] [2020-04-17 23:02:34,549 INFO L92 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 [2020-04-17 23:02:34,603 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:34,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:34,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:34,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:34,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:34,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:34,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:34,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181138671] [2020-04-17 23:02:34,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:34,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:34,638 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:35,020 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-04-17 23:02:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:35,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:35,027 INFO L225 Difference]: With dead ends: 73 [2020-04-17 23:02:35,027 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 23:02:35,028 INFO L678 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 [2020-04-17 23:02:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 23:02:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-04-17 23:02:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:35,035 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:35,035 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:35,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:35,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:35,036 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:35,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,240 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:35,240 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 23:02:35,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:35,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657138192] [2020-04-17 23:02:35,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:35,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657138192] [2020-04-17 23:02:35,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209468278] [2020-04-17 23:02:35,326 INFO L92 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 [2020-04-17 23:02:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:35,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:35,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:35,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:35,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224749979] [2020-04-17 23:02:35,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:35,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:35,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:35,384 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:35,666 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 23:02:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:35,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:35,668 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:35,668 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:35,669 INFO L678 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 [2020-04-17 23:02:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 23:02:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:02:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 23:02:35,672 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 23:02:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:35,673 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 23:02:35,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 23:02:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:35,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:35,673 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:35,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,877 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 23:02:35,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:35,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96448124] [2020-04-17 23:02:35,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:35,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96448124] [2020-04-17 23:02:35,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620559521] [2020-04-17 23:02:35,953 INFO L92 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 [2020-04-17 23:02:35,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:35,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:35,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:35,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:36,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:36,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897913773] [2020-04-17 23:02:36,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:36,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:36,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:36,030 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 23:02:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:36,372 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-04-17 23:02:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:36,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:36,374 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:36,374 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:36,375 INFO L678 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 [2020-04-17 23:02:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-04-17 23:02:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 23:02:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 23:02:36,378 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 23:02:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:36,378 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 23:02:36,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 23:02:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:36,379 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:36,379 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:36,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:36,582 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 23:02:36,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:36,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533098173] [2020-04-17 23:02:36,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533098173] [2020-04-17 23:02:36,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062748847] [2020-04-17 23:02:36,662 INFO L92 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 [2020-04-17 23:02:36,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:36,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:36,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:36,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:36,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:36,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:36,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190212064] [2020-04-17 23:02:36,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:36,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:36,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:36,739 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 23:02:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:37,144 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 23:02:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:37,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:37,145 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:37,145 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:37,145 INFO L678 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 [2020-04-17 23:02:37,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 23:02:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 23:02:37,147 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 23:02:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:37,148 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 23:02:37,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 23:02:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:37,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:37,148 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:37,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:37,352 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 23:02:37,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:37,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147140454] [2020-04-17 23:02:37,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:37,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147140454] [2020-04-17 23:02:37,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768826429] [2020-04-17 23:02:37,449 INFO L92 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 [2020-04-17 23:02:37,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:37,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:37,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:37,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:37,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:37,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:37,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:37,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315920525] [2020-04-17 23:02:37,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:37,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:37,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:37,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:37,529 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 23:02:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:37,892 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 23:02:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:37,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:37,894 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:37,894 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:37,894 INFO L678 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 [2020-04-17 23:02:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 23:02:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 23:02:37,897 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 23:02:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:37,897 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 23:02:37,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 23:02:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:37,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:37,897 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:38,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:38,098 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 23:02:38,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:38,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010083856] [2020-04-17 23:02:38,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010083856] [2020-04-17 23:02:38,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070132946] [2020-04-17 23:02:38,208 INFO L92 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 [2020-04-17 23:02:38,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:38,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:38,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:38,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:38,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:38,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158317800] [2020-04-17 23:02:38,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:38,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:38,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:38,264 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 23:02:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:38,431 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 23:02:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:38,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:38,433 INFO L225 Difference]: With dead ends: 72 [2020-04-17 23:02:38,433 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 23:02:38,433 INFO L678 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 [2020-04-17 23:02:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 23:02:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 23:02:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 23:02:38,436 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 23:02:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:38,436 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 23:02:38,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 23:02:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:38,436 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:38,437 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:38,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:38,638 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 23:02:38,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:38,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627752166] [2020-04-17 23:02:38,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627752166] [2020-04-17 23:02:38,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053201801] [2020-04-17 23:02:38,765 INFO L92 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 [2020-04-17 23:02:38,838 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:38,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:38,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:38,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:38,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:38,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:38,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324745137] [2020-04-17 23:02:38,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:38,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:38,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:38,874 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 23:02:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:39,085 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 23:02:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:39,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:39,087 INFO L225 Difference]: With dead ends: 82 [2020-04-17 23:02:39,087 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 23:02:39,087 INFO L678 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 [2020-04-17 23:02:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 23:02:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 23:02:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 23:02:39,090 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 23:02:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:39,090 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 23:02:39,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 23:02:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:39,090 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:39,091 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:39,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:39,294 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 23:02:39,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:39,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982141302] [2020-04-17 23:02:39,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:39,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982141302] [2020-04-17 23:02:39,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10768275] [2020-04-17 23:02:39,430 INFO L92 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 [2020-04-17 23:02:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:39,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:39,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:39,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:39,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:39,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761325758] [2020-04-17 23:02:39,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:39,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:39,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:39,486 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 23:02:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:39,719 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 23:02:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:39,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:39,721 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:39,721 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:39,722 INFO L678 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 [2020-04-17 23:02:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 23:02:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 23:02:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 23:02:39,724 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 23:02:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:39,724 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 23:02:39,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 23:02:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:39,725 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:39,725 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:39,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:39,928 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 23:02:39,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:39,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912226152] [2020-04-17 23:02:39,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:40,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912226152] [2020-04-17 23:02:40,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482056211] [2020-04-17 23:02:40,044 INFO L92 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 [2020-04-17 23:02:40,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:40,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:40,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:40,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:40,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:40,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:40,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:40,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422044280] [2020-04-17 23:02:40,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:40,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:40,113 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 23:02:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:40,377 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 23:02:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:40,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:40,383 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:40,383 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:40,383 INFO L678 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 [2020-04-17 23:02:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 23:02:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 23:02:40,385 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 23:02:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:40,386 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 23:02:40,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 23:02:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:40,386 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:40,386 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:40,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:40,590 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:40,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 23:02:40,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:40,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386723580] [2020-04-17 23:02:40,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:40,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386723580] [2020-04-17 23:02:40,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439887538] [2020-04-17 23:02:40,678 INFO L92 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 [2020-04-17 23:02:40,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:40,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:40,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:40,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:40,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:40,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:40,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274630824] [2020-04-17 23:02:40,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:40,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:40,761 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 23:02:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:41,106 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 23:02:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:41,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:41,108 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:41,108 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:41,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 23:02:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:41,113 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 23:02:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:41,113 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:41,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:41,114 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:41,114 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:41,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:41,315 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:41,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 23:02:41,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:41,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694845200] [2020-04-17 23:02:41,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:41,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694845200] [2020-04-17 23:02:41,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408951734] [2020-04-17 23:02:41,413 INFO L92 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 [2020-04-17 23:02:41,466 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:41,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:41,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:41,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:41,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:41,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:41,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:41,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982622531] [2020-04-17 23:02:41,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:41,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:41,488 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 23:02:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:41,839 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 23:02:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:41,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:41,840 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:02:41,840 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 23:02:41,841 INFO L678 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 [2020-04-17 23:02:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 23:02:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 23:02:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:41,844 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 23:02:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:41,844 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:41,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:41,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:41,845 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:42,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,048 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 23:02:42,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:42,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180179187] [2020-04-17 23:02:42,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180179187] [2020-04-17 23:02:42,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303253268] [2020-04-17 23:02:42,144 INFO L92 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 [2020-04-17 23:02:42,187 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:42,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:42,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:42,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:42,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:42,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45074406] [2020-04-17 23:02:42,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:42,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:42,198 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 23:02:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:42,487 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 23:02:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:42,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:42,488 INFO L225 Difference]: With dead ends: 87 [2020-04-17 23:02:42,489 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 23:02:42,489 INFO L678 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 [2020-04-17 23:02:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 23:02:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 23:02:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 23:02:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 23:02:42,492 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 23:02:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:42,493 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 23:02:42,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 23:02:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:42,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:42,493 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:42,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,697 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 23:02:42,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:42,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936841458] [2020-04-17 23:02:42,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936841458] [2020-04-17 23:02:42,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769351997] [2020-04-17 23:02:42,769 INFO L92 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 [2020-04-17 23:02:42,813 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:42,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:42,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:42,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:42,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:42,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:42,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813118165] [2020-04-17 23:02:42,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:42,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:42,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:42,854 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 23:02:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:43,243 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 23:02:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:43,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:43,244 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:43,244 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:43,245 INFO L678 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 [2020-04-17 23:02:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 23:02:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 23:02:43,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 23:02:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:43,248 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 23:02:43,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 23:02:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:43,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:43,248 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:43,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,449 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 23:02:43,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:43,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443586338] [2020-04-17 23:02:43,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:43,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443586338] [2020-04-17 23:02:43,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105629310] [2020-04-17 23:02:43,528 INFO L92 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 [2020-04-17 23:02:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:43,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:43,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:43,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:43,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:43,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75952196] [2020-04-17 23:02:43,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:43,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:43,590 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 23:02:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:43,939 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 23:02:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:43,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:43,941 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:02:43,941 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:02:43,942 INFO L678 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 [2020-04-17 23:02:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:02:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 23:02:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:02:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 23:02:43,944 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 23:02:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:43,945 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 23:02:43,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 23:02:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:43,945 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:43,945 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:44,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,148 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 23:02:44,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:44,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309702879] [2020-04-17 23:02:44,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309702879] [2020-04-17 23:02:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901508331] [2020-04-17 23:02:44,253 INFO L92 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 [2020-04-17 23:02:44,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:44,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:44,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:44,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:44,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:44,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:44,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:44,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900405198] [2020-04-17 23:02:44,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:44,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:44,377 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 23:02:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:44,810 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 23:02:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:44,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:44,811 INFO L225 Difference]: With dead ends: 85 [2020-04-17 23:02:44,811 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:44,812 INFO L678 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 [2020-04-17 23:02:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 23:02:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:02:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 23:02:44,814 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 23:02:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:44,814 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 23:02:44,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 23:02:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:44,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:44,815 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:45,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,019 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 23:02:45,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:45,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014931577] [2020-04-17 23:02:45,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014931577] [2020-04-17 23:02:45,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45164985] [2020-04-17 23:02:45,135 INFO L92 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 [2020-04-17 23:02:45,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:45,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:45,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:45,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:45,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:45,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808172559] [2020-04-17 23:02:45,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:45,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:45,192 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 23:02:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:45,455 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 23:02:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:45,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:45,457 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:02:45,457 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:02:45,457 INFO L678 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 [2020-04-17 23:02:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:02:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 23:02:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:45,461 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:45,461 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:45,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:45,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:45,462 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:45,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,667 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 23:02:45,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:45,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031397019] [2020-04-17 23:02:45,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031397019] [2020-04-17 23:02:45,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300173508] [2020-04-17 23:02:45,856 INFO L92 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 [2020-04-17 23:02:45,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:45,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:45,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:45,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:45,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:45,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:45,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287811956] [2020-04-17 23:02:45,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:45,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:45,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:45,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:45,938 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:46,266 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 23:02:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:46,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:46,268 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:02:46,268 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:02:46,268 INFO L678 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 [2020-04-17 23:02:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:02:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 23:02:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:46,271 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:46,272 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:46,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:46,272 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:46,273 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:46,273 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:46,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:46,476 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 23:02:46,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:46,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097096798] [2020-04-17 23:02:46,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:46,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097096798] [2020-04-17 23:02:46,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885757580] [2020-04-17 23:02:46,591 INFO L92 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 [2020-04-17 23:02:46,650 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:46,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:46,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:46,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:46,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:46,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:46,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267301197] [2020-04-17 23:02:46,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:46,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:46,670 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:46,914 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 23:02:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:46,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:46,915 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:02:46,915 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 23:02:46,916 INFO L678 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 [2020-04-17 23:02:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 23:02:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 23:02:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:46,919 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:46,919 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:46,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:46,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:46,920 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:47,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,123 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 23:02:47,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:47,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341371004] [2020-04-17 23:02:47,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341371004] [2020-04-17 23:02:47,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643800104] [2020-04-17 23:02:47,231 INFO L92 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 [2020-04-17 23:02:47,278 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:47,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:47,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:47,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:47,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:47,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:47,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902841420] [2020-04-17 23:02:47,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:47,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:47,308 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:47,653 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 23:02:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:47,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:47,654 INFO L225 Difference]: With dead ends: 87 [2020-04-17 23:02:47,655 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 23:02:47,655 INFO L678 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 [2020-04-17 23:02:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 23:02:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 23:02:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:47,658 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:47,658 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:47,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:47,659 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:47,659 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:47,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,862 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 23:02:47,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:47,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410134370] [2020-04-17 23:02:47,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410134370] [2020-04-17 23:02:47,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655321280] [2020-04-17 23:02:47,969 INFO L92 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 [2020-04-17 23:02:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:48,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:48,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:48,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:48,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:48,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848969855] [2020-04-17 23:02:48,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:48,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:48,028 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:48,316 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 23:02:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:48,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:48,318 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:48,318 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:48,318 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:02:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 23:02:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:48,321 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:48,321 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:48,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:48,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:48,322 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:48,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:48,523 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:48,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 23:02:48,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:48,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657005702] [2020-04-17 23:02:48,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:48,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657005702] [2020-04-17 23:02:48,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903259969] [2020-04-17 23:02:48,635 INFO L92 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 [2020-04-17 23:02:48,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:48,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:48,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:48,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:48,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:48,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:48,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:48,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120861518] [2020-04-17 23:02:48,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:48,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:48,703 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:49,094 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 23:02:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:49,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:49,096 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:49,096 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:49,097 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:02:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 23:02:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:49,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:49,100 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:49,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:49,100 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:49,100 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:49,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:49,303 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:49,303 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 23:02:49,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:49,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242919880] [2020-04-17 23:02:49,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:49,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242919880] [2020-04-17 23:02:49,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243685548] [2020-04-17 23:02:49,421 INFO L92 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 [2020-04-17 23:02:49,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:49,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:49,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:49,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:49,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:49,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:49,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751589536] [2020-04-17 23:02:49,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:49,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:49,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:49,494 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:49,821 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 23:02:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:49,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:49,823 INFO L225 Difference]: With dead ends: 80 [2020-04-17 23:02:49,823 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 23:02:49,823 INFO L678 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 [2020-04-17 23:02:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 23:02:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 23:02:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:49,826 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:49,827 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:49,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:49,827 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:49,827 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:50,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,030 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 23:02:50,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:50,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283097305] [2020-04-17 23:02:50,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:50,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283097305] [2020-04-17 23:02:50,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985925318] [2020-04-17 23:02:50,128 INFO L92 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 [2020-04-17 23:02:50,173 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:50,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:50,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:50,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:50,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:50,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:50,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451518917] [2020-04-17 23:02:50,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:50,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:50,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:50,198 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:50,678 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 23:02:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:50,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:50,679 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:50,680 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:50,680 INFO L678 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 [2020-04-17 23:02:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 23:02:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:50,683 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:50,683 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:50,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:50,683 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:50,684 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:50,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,884 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 23:02:50,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:50,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465534945] [2020-04-17 23:02:50,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:50,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465534945] [2020-04-17 23:02:50,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434948822] [2020-04-17 23:02:50,972 INFO L92 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 [2020-04-17 23:02:51,027 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:51,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:51,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:51,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:51,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:51,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:51,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447353310] [2020-04-17 23:02:51,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:51,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:51,047 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:51,424 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 23:02:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:51,425 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:51,426 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:02:51,426 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:02:51,426 INFO L678 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 [2020-04-17 23:02:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:02:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 23:02:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:02:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 23:02:51,429 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 23:02:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:51,429 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 23:02:51,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 23:02:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:51,430 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:51,430 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:51,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:51,631 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 23:02:51,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:51,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735938691] [2020-04-17 23:02:51,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:51,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735938691] [2020-04-17 23:02:51,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455273232] [2020-04-17 23:02:51,715 INFO L92 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 [2020-04-17 23:02:51,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:51,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:51,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:51,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:51,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:51,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:51,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:51,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361982131] [2020-04-17 23:02:51,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:51,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:51,792 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 23:02:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:52,272 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-04-17 23:02:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:02:52,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:52,273 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:52,273 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:52,274 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:02:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-04-17 23:02:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 23:02:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 23:02:52,276 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 23:02:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:52,276 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 23:02:52,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 23:02:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:52,277 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:52,277 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:52,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:52,481 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 23:02:52,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:52,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482796456] [2020-04-17 23:02:52,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:52,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482796456] [2020-04-17 23:02:52,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378199538] [2020-04-17 23:02:52,597 INFO L92 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 [2020-04-17 23:02:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:52,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:52,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:52,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:52,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:52,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:52,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514342315] [2020-04-17 23:02:52,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:52,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:52,676 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 23:02:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:53,134 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 23:02:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:53,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:53,136 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:53,136 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:02:53,136 INFO L678 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 [2020-04-17 23:02:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:02:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 23:02:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:02:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 23:02:53,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 23:02:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:53,139 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 23:02:53,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 23:02:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:53,140 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:53,140 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:53,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:53,342 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 23:02:53,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:53,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381157679] [2020-04-17 23:02:53,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:53,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381157679] [2020-04-17 23:02:53,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753238900] [2020-04-17 23:02:53,451 INFO L92 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 [2020-04-17 23:02:53,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:53,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:53,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:53,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:53,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:53,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:53,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:53,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645376734] [2020-04-17 23:02:53,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:53,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:53,524 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-04-17 23:02:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:54,014 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-04-17 23:02:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:54,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:54,015 INFO L225 Difference]: With dead ends: 72 [2020-04-17 23:02:54,015 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 23:02:54,016 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:02:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 23:02:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-04-17 23:02:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-04-17 23:02:54,018 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-04-17 23:02:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:54,018 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-04-17 23:02:54,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-04-17 23:02:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:54,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:54,019 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:54,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,220 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 23:02:54,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:54,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36331540] [2020-04-17 23:02:54,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:54,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36331540] [2020-04-17 23:02:54,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981142418] [2020-04-17 23:02:54,356 INFO L92 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 [2020-04-17 23:02:54,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:02:54,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:54,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:54,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:54,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:54,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:02:54,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453236841] [2020-04-17 23:02:54,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:54,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:54,435 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-04-17 23:02:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:54,649 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-04-17 23:02:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:54,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:02:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:54,650 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:54,650 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:54,651 INFO L678 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 [2020-04-17 23:02:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-04-17 23:02:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-04-17 23:02:54,653 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-04-17 23:02:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:54,653 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-04-17 23:02:54,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-04-17 23:02:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:54,654 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:54,654 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:54,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,857 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-04-17 23:02:54,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:54,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465334783] [2020-04-17 23:02:54,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:54,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465334783] [2020-04-17 23:02:54,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940625390] [2020-04-17 23:02:54,992 INFO L92 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 [2020-04-17 23:02:55,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:55,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:55,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:55,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:55,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:55,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:55,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:55,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582220156] [2020-04-17 23:02:55,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:55,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:55,057 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-04-17 23:02:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:55,314 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-04-17 23:02:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:55,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:55,315 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:02:55,315 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 23:02:55,316 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 23:02:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-04-17 23:02:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-04-17 23:02:55,318 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-04-17 23:02:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:55,318 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-04-17 23:02:55,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-04-17 23:02:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:55,319 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:55,319 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:55,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:55,522 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-04-17 23:02:55,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:55,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276687034] [2020-04-17 23:02:55,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:55,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276687034] [2020-04-17 23:02:55,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695854729] [2020-04-17 23:02:55,678 INFO L92 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 [2020-04-17 23:02:55,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:02:55,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:55,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:55,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:55,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:55,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:02:55,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474081376] [2020-04-17 23:02:55,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:55,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:55,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:55,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:55,733 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-04-17 23:02:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:56,030 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-04-17 23:02:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:56,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:02:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:56,032 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:02:56,032 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:02:56,032 INFO L678 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 [2020-04-17 23:02:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:02:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-04-17 23:02:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 23:02:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-04-17 23:02:56,035 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-04-17 23:02:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:56,035 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-04-17 23:02:56,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-04-17 23:02:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:56,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:56,036 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:56,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:56,237 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-04-17 23:02:56,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:56,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74940489] [2020-04-17 23:02:56,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:56,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74940489] [2020-04-17 23:02:56,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519818468] [2020-04-17 23:02:56,348 INFO L92 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 [2020-04-17 23:02:56,397 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:02:56,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:56,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:56,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:56,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:56,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:56,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:56,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328916835] [2020-04-17 23:02:56,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:56,427 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-04-17 23:02:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:56,746 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-04-17 23:02:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:56,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:56,747 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:02:56,747 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:02:56,748 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:02:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:02:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-04-17 23:02:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-04-17 23:02:56,750 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-04-17 23:02:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:56,750 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-04-17 23:02:56,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-04-17 23:02:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:56,751 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:56,751 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:56,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:56,952 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-04-17 23:02:56,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:56,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076340673] [2020-04-17 23:02:56,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:57,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076340673] [2020-04-17 23:02:57,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056431812] [2020-04-17 23:02:57,082 INFO L92 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 [2020-04-17 23:02:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:57,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:57,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:57,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:57,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:02:57,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183191624] [2020-04-17 23:02:57,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:57,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:57,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:57,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:57,144 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-04-17 23:02:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:57,462 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 23:02:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:57,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:02:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:57,463 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:02:57,464 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:02:57,464 INFO L678 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 [2020-04-17 23:02:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:02:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-04-17 23:02:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:02:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-04-17 23:02:57,467 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-04-17 23:02:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:57,467 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-04-17 23:02:57,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-04-17 23:02:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:57,467 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:57,467 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:57,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:57,668 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-04-17 23:02:57,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:57,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036354864] [2020-04-17 23:02:57,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:57,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036354864] [2020-04-17 23:02:57,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714247286] [2020-04-17 23:02:57,789 INFO L92 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 [2020-04-17 23:02:57,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:57,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:57,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:57,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:57,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:57,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:57,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:57,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123589393] [2020-04-17 23:02:57,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:57,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:57,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:57,862 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-04-17 23:02:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:58,247 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-04-17 23:02:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:58,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:58,249 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:02:58,249 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:02:58,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:02:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:02:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-04-17 23:02:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:02:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-04-17 23:02:58,252 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-04-17 23:02:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:58,252 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-04-17 23:02:58,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-04-17 23:02:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:58,253 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:58,253 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:58,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:58,456 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-04-17 23:02:58,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:58,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224060735] [2020-04-17 23:02:58,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:58,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224060735] [2020-04-17 23:02:58,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468895950] [2020-04-17 23:02:58,569 INFO L92 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 [2020-04-17 23:02:58,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:02:58,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:58,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:58,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:58,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:58,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:02:58,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464835561] [2020-04-17 23:02:58,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:58,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:58,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:58,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:58,628 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-04-17 23:02:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:58,984 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-04-17 23:02:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:58,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:02:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:58,986 INFO L225 Difference]: With dead ends: 97 [2020-04-17 23:02:58,986 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:02:58,986 INFO L678 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 [2020-04-17 23:02:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:02:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-04-17 23:02:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:58,989 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-04-17 23:02:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:58,989 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:58,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:58,989 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:58,990 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:59,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:59,190 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:59,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-04-17 23:02:59,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:59,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385635288] [2020-04-17 23:02:59,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:59,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385635288] [2020-04-17 23:02:59,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459892233] [2020-04-17 23:02:59,283 INFO L92 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 [2020-04-17 23:02:59,330 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:59,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:59,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:59,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:59,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:59,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:59,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:59,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039712051] [2020-04-17 23:02:59,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:59,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:59,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:59,354 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-04-17 23:03:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:00,067 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 23:03:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:00,067 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:00,068 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:03:00,069 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:03:00,069 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:03:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-04-17 23:03:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:03:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:03:00,073 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-04-17 23:03:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:00,073 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:03:00,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:03:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:00,074 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:00,074 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:00,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:00,279 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-04-17 23:03:00,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:00,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959669338] [2020-04-17 23:03:00,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:00,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959669338] [2020-04-17 23:03:00,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333913619] [2020-04-17 23:03:00,383 INFO L92 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 [2020-04-17 23:03:00,437 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:00,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:00,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:00,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:00,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:00,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:03:00,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617209775] [2020-04-17 23:03:00,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:03:00,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:03:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:03:00,474 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-04-17 23:03:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:00,875 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-04-17 23:03:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:00,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:03:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:00,876 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:03:00,876 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:03:00,877 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:03:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-04-17 23:03:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 23:03:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-04-17 23:03:00,879 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-04-17 23:03:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:00,879 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-04-17 23:03:00,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:03:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-04-17 23:03:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:00,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:00,880 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:01,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:01,081 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-04-17 23:03:01,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:01,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997516503] [2020-04-17 23:03:01,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:01,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997516503] [2020-04-17 23:03:01,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455030596] [2020-04-17 23:03:01,172 INFO L92 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 [2020-04-17 23:03:01,219 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:03:01,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:01,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:01,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:01,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:01,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:03:01,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363239675] [2020-04-17 23:03:01,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:01,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:01,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:01,245 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-04-17 23:03:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:01,772 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-04-17 23:03:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:01,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:01,774 INFO L225 Difference]: With dead ends: 92 [2020-04-17 23:03:01,774 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 23:03:01,774 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 23:03:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-04-17 23:03:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:03:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 23:03:01,776 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-04-17 23:03:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:01,777 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 23:03:01,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 23:03:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:01,777 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:01,777 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:01,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:01,978 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-04-17 23:03:01,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:01,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824907611] [2020-04-17 23:03:01,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:02,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824907611] [2020-04-17 23:03:02,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339071681] [2020-04-17 23:03:02,070 INFO L92 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 [2020-04-17 23:03:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:02,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:02,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:02,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:02,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:03:02,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366104481] [2020-04-17 23:03:02,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:03:02,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:03:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:03:02,125 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-04-17 23:03:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:02,555 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-04-17 23:03:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:02,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:03:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:02,557 INFO L225 Difference]: With dead ends: 112 [2020-04-17 23:03:02,557 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 23:03:02,558 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:03:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 23:03:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-04-17 23:03:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-04-17 23:03:02,561 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-04-17 23:03:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:02,561 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-04-17 23:03:02,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:03:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-04-17 23:03:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:02,562 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:02,562 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:02,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:02,765 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-04-17 23:03:02,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:02,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48983657] [2020-04-17 23:03:02,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:02,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48983657] [2020-04-17 23:03:02,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446137339] [2020-04-17 23:03:02,869 INFO L92 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 [2020-04-17 23:03:02,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:02,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:02,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:02,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:02,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:02,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:02,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:03:02,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879557061] [2020-04-17 23:03:02,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:02,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:02,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:02,941 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-04-17 23:03:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:03,496 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-04-17 23:03:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:03,497 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:03,498 INFO L225 Difference]: With dead ends: 93 [2020-04-17 23:03:03,498 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:03:03,498 INFO L678 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 [2020-04-17 23:03:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:03:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-04-17 23:03:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 23:03:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-04-17 23:03:03,501 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-04-17 23:03:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:03,501 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-04-17 23:03:03,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-04-17 23:03:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:03,502 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:03,502 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:03,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:03,702 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-04-17 23:03:03,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:03,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854730769] [2020-04-17 23:03:03,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:03,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854730769] [2020-04-17 23:03:03,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697334695] [2020-04-17 23:03:03,854 INFO L92 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 [2020-04-17 23:03:03,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:03,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:03,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:03,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:03,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:03,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:03,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813066107] [2020-04-17 23:03:03,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:03,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:03,914 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-04-17 23:03:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:04,174 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-04-17 23:03:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:03:04,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:04,175 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:03:04,176 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:03:04,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:03:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:03:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-04-17 23:03:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:04,179 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:04,179 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:04,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:04,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:04,180 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:04,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:04,383 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-04-17 23:03:04,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:04,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749621961] [2020-04-17 23:03:04,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:04,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749621961] [2020-04-17 23:03:04,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877883280] [2020-04-17 23:03:04,514 INFO L92 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 [2020-04-17 23:03:04,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:04,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:04,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:04,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:04,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:04,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:04,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:04,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608236949] [2020-04-17 23:03:04,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:04,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:04,586 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:04,921 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-04-17 23:03:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:03:04,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:04,923 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:03:04,923 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:03:04,923 INFO L678 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 [2020-04-17 23:03:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:03:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-04-17 23:03:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:04,925 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:04,926 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:04,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:04,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:04,926 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:05,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:05,127 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-04-17 23:03:05,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:05,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589079332] [2020-04-17 23:03:05,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:05,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589079332] [2020-04-17 23:03:05,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261402486] [2020-04-17 23:03:05,246 INFO L92 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 [2020-04-17 23:03:05,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:05,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:05,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:05,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:05,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:05,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:05,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572203827] [2020-04-17 23:03:05,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:05,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:05,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:05,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:05,307 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:05,596 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-04-17 23:03:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:05,597 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:05,598 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:03:05,598 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:03:05,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:03:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:03:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-04-17 23:03:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:05,601 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:05,601 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:05,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:05,602 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:05,602 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:05,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:05,805 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:05,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-04-17 23:03:05,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:05,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623202482] [2020-04-17 23:03:05,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:05,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623202482] [2020-04-17 23:03:05,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734870074] [2020-04-17 23:03:05,931 INFO L92 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 [2020-04-17 23:03:05,984 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:03:05,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:05,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:05,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:06,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:06,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:06,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:06,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116956705] [2020-04-17 23:03:06,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:06,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:06,012 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:06,399 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-04-17 23:03:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:06,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:06,400 INFO L225 Difference]: With dead ends: 97 [2020-04-17 23:03:06,400 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:03:06,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 23:03:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:03:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-04-17 23:03:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:06,403 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:06,404 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:06,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:06,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:06,404 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:06,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:06,608 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-04-17 23:03:06,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:06,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313272397] [2020-04-17 23:03:06,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:06,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313272397] [2020-04-17 23:03:06,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573804649] [2020-04-17 23:03:06,724 INFO L92 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 [2020-04-17 23:03:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:06,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:06,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:06,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:06,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:06,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468557673] [2020-04-17 23:03:06,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:06,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:06,778 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:07,110 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-04-17 23:03:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:07,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:07,111 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:03:07,112 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:03:07,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:03:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:03:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-04-17 23:03:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:07,114 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:07,114 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:07,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:07,115 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:07,115 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:07,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:07,316 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-04-17 23:03:07,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:07,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544805584] [2020-04-17 23:03:07,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:07,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544805584] [2020-04-17 23:03:07,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328687248] [2020-04-17 23:03:07,463 INFO L92 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 [2020-04-17 23:03:07,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:07,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:07,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:07,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:07,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:07,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:07,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:07,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157299240] [2020-04-17 23:03:07,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:07,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:07,554 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:08,011 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-04-17 23:03:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:08,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:08,013 INFO L225 Difference]: With dead ends: 93 [2020-04-17 23:03:08,013 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 23:03:08,013 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 23:03:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-04-17 23:03:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:08,015 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:08,015 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:08,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:08,016 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:08,016 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:08,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:08,217 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-04-17 23:03:08,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:08,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718283568] [2020-04-17 23:03:08,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:08,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718283568] [2020-04-17 23:03:08,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606520258] [2020-04-17 23:03:08,322 INFO L92 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 [2020-04-17 23:03:08,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:08,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:08,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:03:08,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:08,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:08,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:08,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195980787] [2020-04-17 23:03:08,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:08,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:08,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:08,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:08,386 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:08,777 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-04-17 23:03:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:08,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:08,779 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:03:08,779 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 23:03:08,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 23:03:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-04-17 23:03:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:08,782 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:08,782 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:08,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:08,783 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:08,783 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:08,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:08,986 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:08,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-04-17 23:03:08,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:08,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853859984] [2020-04-17 23:03:08,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:09,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853859984] [2020-04-17 23:03:09,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947857930] [2020-04-17 23:03:09,093 INFO L92 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 [2020-04-17 23:03:09,139 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:09,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:09,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:09,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:09,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:09,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:09,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:09,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571544690] [2020-04-17 23:03:09,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:09,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:09,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:09,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:09,163 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:09,679 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 23:03:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:09,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:09,680 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:03:09,680 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:03:09,681 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:03:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:03:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-04-17 23:03:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:09,683 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:09,683 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:09,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:09,684 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:09,684 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:09,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:09,884 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-04-17 23:03:09,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:09,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128015521] [2020-04-17 23:03:09,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:09,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128015521] [2020-04-17 23:03:09,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316423946] [2020-04-17 23:03:09,991 INFO L92 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 [2020-04-17 23:03:10,039 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:10,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:10,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:10,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:10,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:10,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:10,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169674339] [2020-04-17 23:03:10,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:10,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:10,077 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:10,499 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-04-17 23:03:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:10,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:10,501 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:03:10,501 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 23:03:10,502 INFO L678 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 [2020-04-17 23:03:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 23:03:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-04-17 23:03:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:10,505 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:10,505 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:10,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:10,506 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:10,506 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:10,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:10,709 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-04-17 23:03:10,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:10,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343642936] [2020-04-17 23:03:10,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:10,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343642936] [2020-04-17 23:03:10,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833706246] [2020-04-17 23:03:10,806 INFO L92 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 [2020-04-17 23:03:10,854 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:03:10,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:10,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:10,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:10,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:10,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:10,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:10,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040878677] [2020-04-17 23:03:10,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:10,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:10,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:10,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:10,888 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:11,469 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-04-17 23:03:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:11,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:11,471 INFO L225 Difference]: With dead ends: 85 [2020-04-17 23:03:11,471 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:03:11,471 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:03:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-04-17 23:03:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:11,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:11,474 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:11,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:11,475 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:11,475 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:11,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:11,678 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-04-17 23:03:11,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:11,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678340664] [2020-04-17 23:03:11,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:11,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678340664] [2020-04-17 23:03:11,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473420210] [2020-04-17 23:03:11,768 INFO L92 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 [2020-04-17 23:03:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:11,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:11,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:11,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:11,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:11,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018506271] [2020-04-17 23:03:11,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:11,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:11,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:11,826 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:12,272 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 23:03:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:12,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:12,274 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:03:12,274 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:03:12,275 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:03:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:03:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-04-17 23:03:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:03:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-04-17 23:03:12,277 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-04-17 23:03:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:12,278 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-04-17 23:03:12,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-04-17 23:03:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:12,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:12,278 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:12,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:12,482 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-04-17 23:03:12,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:12,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37302723] [2020-04-17 23:03:12,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:12,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37302723] [2020-04-17 23:03:12,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823268671] [2020-04-17 23:03:12,590 INFO L92 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 [2020-04-17 23:03:12,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:12,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:12,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:12,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:12,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:12,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:12,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137955223] [2020-04-17 23:03:12,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:12,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:12,671 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-04-17 23:03:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:13,227 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-04-17 23:03:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:13,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:13,229 INFO L225 Difference]: With dead ends: 80 [2020-04-17 23:03:13,229 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:03:13,229 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:03:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-04-17 23:03:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 23:03:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-04-17 23:03:13,232 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-04-17 23:03:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:13,232 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-04-17 23:03:13,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-04-17 23:03:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:13,233 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:13,233 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:13,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:13,436 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:13,436 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-04-17 23:03:13,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:13,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279258706] [2020-04-17 23:03:13,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279258706] [2020-04-17 23:03:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145851182] [2020-04-17 23:03:13,527 INFO L92 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 [2020-04-17 23:03:13,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:13,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:13,574 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:13,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:13,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:13,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:13,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:13,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996492956] [2020-04-17 23:03:13,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:13,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:13,601 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-04-17 23:03:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:14,156 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 23:03:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:14,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:14,157 INFO L225 Difference]: With dead ends: 92 [2020-04-17 23:03:14,158 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 23:03:14,158 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 23:03:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 23:03:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-04-17 23:03:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 23:03:14,161 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-04-17 23:03:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:14,161 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 23:03:14,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 23:03:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:14,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:14,162 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:14,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:14,363 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-04-17 23:03:14,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:14,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853277173] [2020-04-17 23:03:14,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:14,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853277173] [2020-04-17 23:03:14,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85630130] [2020-04-17 23:03:14,480 INFO L92 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 [2020-04-17 23:03:14,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:14,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:14,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:14,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:14,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:14,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:14,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:14,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344823367] [2020-04-17 23:03:14,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:14,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:14,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:14,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:14,555 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-04-17 23:03:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:15,156 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-04-17 23:03:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:15,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:15,157 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:03:15,158 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:03:15,158 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:03:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:03:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-04-17 23:03:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:03:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-04-17 23:03:15,160 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-04-17 23:03:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:15,160 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-04-17 23:03:15,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-04-17 23:03:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:15,161 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:15,161 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:15,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:15,362 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-04-17 23:03:15,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:15,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289503319] [2020-04-17 23:03:15,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:15,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289503319] [2020-04-17 23:03:15,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485707057] [2020-04-17 23:03:15,515 INFO L92 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 [2020-04-17 23:03:15,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:15,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:15,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:15,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:15,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:15,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:15,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124969290] [2020-04-17 23:03:15,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:15,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:15,572 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-04-17 23:03:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:15,835 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 23:03:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:03:15,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:15,836 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:03:15,836 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:03:15,837 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:03:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:03:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-04-17 23:03:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:03:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-04-17 23:03:15,839 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-04-17 23:03:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:15,839 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-04-17 23:03:15,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-04-17 23:03:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:15,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:15,840 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:16,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:16,041 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:16,042 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-04-17 23:03:16,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:16,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407532057] [2020-04-17 23:03:16,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:16,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407532057] [2020-04-17 23:03:16,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033312805] [2020-04-17 23:03:16,189 INFO L92 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 [2020-04-17 23:03:16,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:16,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:16,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:16,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:16,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:16,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:16,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:16,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735604828] [2020-04-17 23:03:16,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:16,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:16,263 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-04-17 23:03:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:16,580 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-04-17 23:03:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:03:16,581 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:16,582 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:03:16,582 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:03:16,582 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:03:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:03:16,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-04-17 23:03:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:03:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-04-17 23:03:16,584 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-04-17 23:03:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:16,584 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-04-17 23:03:16,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-04-17 23:03:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:16,585 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:16,585 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:16,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:16,788 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-04-17 23:03:16,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:16,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554931133] [2020-04-17 23:03:16,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:16,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554931133] [2020-04-17 23:03:16,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945346001] [2020-04-17 23:03:16,928 INFO L92 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 [2020-04-17 23:03:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:16,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:16,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:16,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:16,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:16,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591065312] [2020-04-17 23:03:16,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:16,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:16,985 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-04-17 23:03:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:17,339 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 23:03:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:17,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:17,340 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:03:17,340 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:17,340 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:03:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-04-17 23:03:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:03:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-04-17 23:03:17,343 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-04-17 23:03:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:17,343 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-04-17 23:03:17,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-04-17 23:03:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:17,344 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:17,344 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:17,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:17,544 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-04-17 23:03:17,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:17,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107477662] [2020-04-17 23:03:17,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:17,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107477662] [2020-04-17 23:03:17,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685999957] [2020-04-17 23:03:17,694 INFO L92 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 [2020-04-17 23:03:17,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:17,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:17,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:17,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:17,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:17,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:17,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:17,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982461289] [2020-04-17 23:03:17,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:17,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:17,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:17,774 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-04-17 23:03:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:18,164 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-04-17 23:03:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:18,165 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:18,166 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:03:18,166 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:03:18,166 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:03:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-04-17 23:03:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:03:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-04-17 23:03:18,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-04-17 23:03:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:18,169 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-04-17 23:03:18,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-04-17 23:03:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:18,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:18,170 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:18,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:18,373 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:18,374 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-04-17 23:03:18,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:18,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215977206] [2020-04-17 23:03:18,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:18,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215977206] [2020-04-17 23:03:18,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198057957] [2020-04-17 23:03:18,502 INFO L92 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 [2020-04-17 23:03:18,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:18,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:18,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:18,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:18,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:18,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:18,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531509316] [2020-04-17 23:03:18,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:18,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:18,564 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-04-17 23:03:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:18,903 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-04-17 23:03:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:18,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:18,905 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:03:18,905 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:03:18,906 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:03:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-04-17 23:03:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 23:03:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-04-17 23:03:18,909 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-04-17 23:03:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:18,909 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-04-17 23:03:18,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-04-17 23:03:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:18,909 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:18,910 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:19,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:19,113 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-04-17 23:03:19,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:19,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258821255] [2020-04-17 23:03:19,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:19,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258821255] [2020-04-17 23:03:19,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363325185] [2020-04-17 23:03:19,254 INFO L92 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 [2020-04-17 23:03:19,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:19,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:19,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:19,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:19,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:19,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:19,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:19,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900092929] [2020-04-17 23:03:19,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:19,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:19,326 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-04-17 23:03:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:19,751 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-04-17 23:03:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:19,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:19,753 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:03:19,753 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 23:03:19,754 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 23:03:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 23:03:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:03:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-04-17 23:03:19,756 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-04-17 23:03:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:19,757 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-04-17 23:03:19,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-04-17 23:03:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:19,757 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:19,757 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:19,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:19,961 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-04-17 23:03:19,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:19,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787748593] [2020-04-17 23:03:19,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:20,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787748593] [2020-04-17 23:03:20,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225118650] [2020-04-17 23:03:20,083 INFO L92 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 [2020-04-17 23:03:20,130 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:20,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:20,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:20,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:20,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:20,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:20,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134188474] [2020-04-17 23:03:20,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:20,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:20,143 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-04-17 23:03:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:20,538 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-04-17 23:03:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:20,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:20,540 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:20,540 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:20,540 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:03:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 23:03:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 23:03:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-04-17 23:03:20,543 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-04-17 23:03:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:20,543 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-04-17 23:03:20,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-04-17 23:03:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:20,544 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:20,544 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:20,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:20,747 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:20,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-04-17 23:03:20,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:20,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165358075] [2020-04-17 23:03:20,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:20,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165358075] [2020-04-17 23:03:20,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092157741] [2020-04-17 23:03:20,875 INFO L92 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 [2020-04-17 23:03:20,926 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:20,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:20,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:20,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:20,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:20,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:20,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:20,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058055566] [2020-04-17 23:03:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:20,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:20,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:20,951 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-04-17 23:03:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:21,447 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-04-17 23:03:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:21,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:21,448 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:03:21,449 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:03:21,449 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:03:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:03:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-04-17 23:03:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:03:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-04-17 23:03:21,452 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-04-17 23:03:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:21,452 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-04-17 23:03:21,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-04-17 23:03:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:21,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:21,453 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:21,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:21,656 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-04-17 23:03:21,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:21,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872697723] [2020-04-17 23:03:21,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:21,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872697723] [2020-04-17 23:03:21,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338454331] [2020-04-17 23:03:21,836 INFO L92 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 [2020-04-17 23:03:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:21,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:21,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:21,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:21,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:21,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668684779] [2020-04-17 23:03:21,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:21,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:21,933 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-04-17 23:03:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:22,377 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-04-17 23:03:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:22,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:22,379 INFO L225 Difference]: With dead ends: 105 [2020-04-17 23:03:22,379 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 23:03:22,379 INFO L678 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 [2020-04-17 23:03:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 23:03:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-04-17 23:03:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:22,386 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-04-17 23:03:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:22,387 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:22,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:22,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:22,387 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:22,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:22,588 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-04-17 23:03:22,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:22,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820435711] [2020-04-17 23:03:22,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:22,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820435711] [2020-04-17 23:03:22,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353332998] [2020-04-17 23:03:22,709 INFO L92 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 [2020-04-17 23:03:22,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:22,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:22,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:22,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:22,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:22,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:22,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:22,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583118420] [2020-04-17 23:03:22,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:22,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:22,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:22,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:22,779 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-04-17 23:03:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:23,341 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-04-17 23:03:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:23,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:23,342 INFO L225 Difference]: With dead ends: 102 [2020-04-17 23:03:23,342 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 23:03:23,343 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:03:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 23:03:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-04-17 23:03:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:23,345 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-04-17 23:03:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:23,345 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:23,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:23,345 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:23,346 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:23,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:23,549 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-04-17 23:03:23,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369720790] [2020-04-17 23:03:23,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:23,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369720790] [2020-04-17 23:03:23,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048813950] [2020-04-17 23:03:23,658 INFO L92 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 [2020-04-17 23:03:23,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:23,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:23,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:03:23,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:23,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:23,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:23,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682072011] [2020-04-17 23:03:23,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:23,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:23,739 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-04-17 23:03:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:24,187 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-04-17 23:03:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:03:24,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:24,189 INFO L225 Difference]: With dead ends: 103 [2020-04-17 23:03:24,189 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 23:03:24,189 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 23:03:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 23:03:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-04-17 23:03:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 23:03:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-04-17 23:03:24,192 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-04-17 23:03:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:24,192 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-04-17 23:03:24,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-04-17 23:03:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:24,193 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:24,193 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:24,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:24,396 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-04-17 23:03:24,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:24,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562381488] [2020-04-17 23:03:24,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:24,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562381488] [2020-04-17 23:03:24,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033714996] [2020-04-17 23:03:24,538 INFO L92 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 [2020-04-17 23:03:24,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:24,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:24,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:24,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:24,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:24,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:24,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:24,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185156347] [2020-04-17 23:03:24,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:24,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:24,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:24,687 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-04-17 23:03:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:25,564 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-04-17 23:03:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:03:25,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:25,565 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:03:25,565 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 23:03:25,566 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:03:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 23:03:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-04-17 23:03:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 23:03:25,569 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-04-17 23:03:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:25,569 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 23:03:25,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 23:03:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:25,570 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:25,571 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:25,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:25,771 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-04-17 23:03:25,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:25,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154668364] [2020-04-17 23:03:25,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:25,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154668364] [2020-04-17 23:03:25,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239174392] [2020-04-17 23:03:25,938 INFO L92 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 [2020-04-17 23:03:25,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:25,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:25,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:25,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:26,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:26,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:26,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119546191] [2020-04-17 23:03:26,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:26,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:26,008 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-04-17 23:03:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:26,509 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 23:03:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:26,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:26,510 INFO L225 Difference]: With dead ends: 120 [2020-04-17 23:03:26,510 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 23:03:26,511 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:03:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 23:03:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-04-17 23:03:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:03:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-04-17 23:03:26,513 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-04-17 23:03:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:26,513 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-04-17 23:03:26,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-04-17 23:03:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:26,514 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:26,514 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:26,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:26,715 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-04-17 23:03:26,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:26,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494590165] [2020-04-17 23:03:26,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:26,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494590165] [2020-04-17 23:03:26,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835415123] [2020-04-17 23:03:26,824 INFO L92 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 [2020-04-17 23:03:26,871 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:26,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:26,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:26,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:26,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:26,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:26,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685513683] [2020-04-17 23:03:26,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:26,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:26,924 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-04-17 23:03:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:27,554 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-04-17 23:03:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:27,554 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:27,555 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:03:27,555 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:27,555 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:03:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-04-17 23:03:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 23:03:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-04-17 23:03:27,558 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-04-17 23:03:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:27,559 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-04-17 23:03:27,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-04-17 23:03:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:27,559 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:27,559 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:27,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:27,762 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-04-17 23:03:27,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:27,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757017928] [2020-04-17 23:03:27,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:27,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757017928] [2020-04-17 23:03:27,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773214430] [2020-04-17 23:03:27,914 INFO L92 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 [2020-04-17 23:03:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:27,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:27,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:27,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:27,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:27,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034479476] [2020-04-17 23:03:27,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:27,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:27,972 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-04-17 23:03:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:28,271 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-04-17 23:03:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:28,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:28,272 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:03:28,272 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:03:28,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:03:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:03:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-04-17 23:03:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:28,275 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:28,275 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:28,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:28,275 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:28,276 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:28,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:28,478 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-04-17 23:03:28,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:28,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540584910] [2020-04-17 23:03:28,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:28,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540584910] [2020-04-17 23:03:28,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572230794] [2020-04-17 23:03:28,643 INFO L92 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 [2020-04-17 23:03:28,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:28,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:28,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:28,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:28,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:28,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:28,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:28,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768984392] [2020-04-17 23:03:28,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:28,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:28,711 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:29,099 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-04-17 23:03:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:29,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:29,100 INFO L225 Difference]: With dead ends: 111 [2020-04-17 23:03:29,100 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 23:03:29,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 23:03:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-04-17 23:03:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:29,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:29,103 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:29,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:29,104 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:29,104 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:29,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:29,304 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-04-17 23:03:29,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:29,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244232162] [2020-04-17 23:03:29,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:29,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244232162] [2020-04-17 23:03:29,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817941410] [2020-04-17 23:03:29,487 INFO L92 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 [2020-04-17 23:03:29,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:29,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:29,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:29,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:29,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:29,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:29,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018295235] [2020-04-17 23:03:29,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:29,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:29,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:29,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:29,596 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:30,127 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 23:03:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:30,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:30,129 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:03:30,129 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 23:03:30,129 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 23:03:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-04-17 23:03:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:30,132 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:30,133 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:30,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:30,134 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:30,134 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:30,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:30,335 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-04-17 23:03:30,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:30,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499484914] [2020-04-17 23:03:30,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:30,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499484914] [2020-04-17 23:03:30,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50622052] [2020-04-17 23:03:30,603 INFO L92 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 [2020-04-17 23:03:30,684 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:30,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:30,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:30,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:30,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:30,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:30,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:30,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964973748] [2020-04-17 23:03:30,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:30,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:30,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:30,733 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:31,278 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-04-17 23:03:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:31,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:31,279 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:31,280 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:31,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:03:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-04-17 23:03:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:31,282 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:31,282 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:31,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:31,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:31,283 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:31,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:31,486 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-04-17 23:03:31,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:31,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895847782] [2020-04-17 23:03:31,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:31,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895847782] [2020-04-17 23:03:31,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46843455] [2020-04-17 23:03:31,628 INFO L92 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 [2020-04-17 23:03:31,676 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:31,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:31,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:31,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:31,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:31,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:31,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717268705] [2020-04-17 23:03:31,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:31,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:31,687 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:32,091 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 23:03:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:32,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:32,093 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:03:32,093 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:03:32,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:03:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-04-17 23:03:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:32,096 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:32,096 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:32,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:32,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:32,097 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:32,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:32,300 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:32,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:32,301 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-04-17 23:03:32,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:32,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903386900] [2020-04-17 23:03:32,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:32,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903386900] [2020-04-17 23:03:32,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387869560] [2020-04-17 23:03:32,442 INFO L92 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 [2020-04-17 23:03:32,492 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:32,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:32,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:32,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:32,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:32,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:32,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:32,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903557115] [2020-04-17 23:03:32,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:32,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:32,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:32,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:32,519 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:33,050 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-04-17 23:03:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:33,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:33,051 INFO L225 Difference]: With dead ends: 103 [2020-04-17 23:03:33,051 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 23:03:33,052 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 23:03:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-04-17 23:03:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:33,054 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:33,055 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:33,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:33,055 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:33,055 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:33,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:33,259 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:33,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-04-17 23:03:33,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:33,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730521168] [2020-04-17 23:03:33,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:33,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730521168] [2020-04-17 23:03:33,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873052553] [2020-04-17 23:03:33,394 INFO L92 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 [2020-04-17 23:03:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:33,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:33,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:33,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:33,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:33,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766740733] [2020-04-17 23:03:33,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:33,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:33,453 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:33,886 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-04-17 23:03:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:33,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:33,888 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:03:33,888 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 23:03:33,888 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:03:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 23:03:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-04-17 23:03:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:33,891 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:33,892 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:33,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:33,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:33,892 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:34,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:34,095 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:34,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-04-17 23:03:34,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:34,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075239614] [2020-04-17 23:03:34,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:34,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075239614] [2020-04-17 23:03:34,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174126491] [2020-04-17 23:03:34,287 INFO L92 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 [2020-04-17 23:03:34,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:34,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:34,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:34,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:34,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:34,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:34,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:34,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170362608] [2020-04-17 23:03:34,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:34,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:34,430 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:35,003 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 23:03:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:35,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:35,005 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:03:35,005 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:35,005 INFO L678 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 [2020-04-17 23:03:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-04-17 23:03:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:35,007 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:35,008 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:35,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:35,008 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:35,008 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:35,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:35,209 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-04-17 23:03:35,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:35,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864370361] [2020-04-17 23:03:35,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:35,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864370361] [2020-04-17 23:03:35,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931889733] [2020-04-17 23:03:35,340 INFO L92 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 [2020-04-17 23:03:35,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:35,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:35,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:35,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:35,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:35,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:35,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319360189] [2020-04-17 23:03:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:35,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:35,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:35,406 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:35,891 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-04-17 23:03:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:35,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:35,893 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:03:35,893 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:03:35,893 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:03:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:03:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-04-17 23:03:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:35,896 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:35,896 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:35,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:35,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:35,897 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:36,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:36,100 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-04-17 23:03:36,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:36,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332607713] [2020-04-17 23:03:36,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:36,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332607713] [2020-04-17 23:03:36,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124699429] [2020-04-17 23:03:36,246 INFO L92 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 [2020-04-17 23:03:36,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:36,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:36,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:36,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:36,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:36,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:36,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:36,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456957499] [2020-04-17 23:03:36,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:36,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:36,338 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:36,986 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 23:03:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:03:36,987 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:36,987 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:03:36,987 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:03:36,988 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:03:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:03:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-04-17 23:03:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:36,990 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:36,990 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:36,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:36,991 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:36,991 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:37,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:37,192 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-04-17 23:03:37,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:37,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182647405] [2020-04-17 23:03:37,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182647405] [2020-04-17 23:03:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440244853] [2020-04-17 23:03:37,382 INFO L92 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 [2020-04-17 23:03:37,455 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:37,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:37,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:37,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:37,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:37,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:37,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504641705] [2020-04-17 23:03:37,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:37,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:37,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:37,480 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:38,013 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 23:03:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:03:38,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:38,014 INFO L225 Difference]: With dead ends: 92 [2020-04-17 23:03:38,014 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 23:03:38,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:03:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 23:03:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-04-17 23:03:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:38,017 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:38,017 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:38,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:38,018 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:38,018 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:38,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:38,221 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-04-17 23:03:38,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:38,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139739265] [2020-04-17 23:03:38,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:38,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139739265] [2020-04-17 23:03:38,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867657209] [2020-04-17 23:03:38,354 INFO L92 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 [2020-04-17 23:03:38,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:38,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:38,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:38,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:38,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:38,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:38,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:38,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032211329] [2020-04-17 23:03:38,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:38,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:38,471 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:39,175 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-04-17 23:03:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:39,175 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:39,176 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:03:39,176 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:03:39,177 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:03:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:03:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-04-17 23:03:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:39,179 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:39,179 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:39,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:39,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:39,180 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:39,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:39,383 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-04-17 23:03:39,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:39,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659659263] [2020-04-17 23:03:39,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:39,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659659263] [2020-04-17 23:03:39,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481470856] [2020-04-17 23:03:39,562 INFO L92 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 [2020-04-17 23:03:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:39,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:39,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:39,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:39,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:39,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178847905] [2020-04-17 23:03:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:39,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:39,668 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:40,310 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 23:03:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:40,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:40,311 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:40,311 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:40,311 INFO L678 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 [2020-04-17 23:03:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-04-17 23:03:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 23:03:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-04-17 23:03:40,315 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-04-17 23:03:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:40,321 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-04-17 23:03:40,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-04-17 23:03:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:40,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:40,322 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:40,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:40,523 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-04-17 23:03:40,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:40,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555360954] [2020-04-17 23:03:40,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:40,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555360954] [2020-04-17 23:03:40,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032942704] [2020-04-17 23:03:40,684 INFO L92 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 [2020-04-17 23:03:40,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:40,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:40,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:40,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:40,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:40,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:40,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959331500] [2020-04-17 23:03:40,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:40,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:40,808 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-04-17 23:03:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:41,579 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-04-17 23:03:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:41,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:41,580 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:03:41,581 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:03:41,581 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:03:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:03:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 23:03:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:03:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-04-17 23:03:41,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-04-17 23:03:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:41,583 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-04-17 23:03:41,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-04-17 23:03:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:41,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:41,586 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:41,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:41,789 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:41,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:41,790 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-04-17 23:03:41,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:41,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434950466] [2020-04-17 23:03:41,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:41,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434950466] [2020-04-17 23:03:41,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540524181] [2020-04-17 23:03:41,903 INFO L92 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 [2020-04-17 23:03:41,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:41,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:41,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:41,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:41,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:41,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:41,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:41,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619370845] [2020-04-17 23:03:41,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:41,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:41,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:41,980 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-04-17 23:03:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:42,667 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-04-17 23:03:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:42,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:42,668 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:03:42,668 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:03:42,669 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:03:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:03:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-04-17 23:03:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:03:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 23:03:42,671 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-04-17 23:03:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:42,671 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 23:03:42,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 23:03:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:42,672 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:42,672 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:42,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:42,873 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:42,873 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-04-17 23:03:42,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:42,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111270731] [2020-04-17 23:03:42,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:43,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111270731] [2020-04-17 23:03:43,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952973338] [2020-04-17 23:03:43,009 INFO L92 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 [2020-04-17 23:03:43,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:43,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:43,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:43,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:43,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:43,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:43,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:43,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716253875] [2020-04-17 23:03:43,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:43,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:43,087 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-04-17 23:03:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:43,809 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-04-17 23:03:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:43,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:43,810 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:03:43,811 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:03:43,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:03:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:03:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-04-17 23:03:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:03:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-04-17 23:03:43,814 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-04-17 23:03:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:43,814 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-04-17 23:03:43,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-04-17 23:03:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:43,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:43,815 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:44,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:44,015 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-04-17 23:03:44,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:44,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976567417] [2020-04-17 23:03:44,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:44,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976567417] [2020-04-17 23:03:44,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800841661] [2020-04-17 23:03:44,192 INFO L92 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 [2020-04-17 23:03:44,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:03:44,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:44,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:44,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:44,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:44,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:44,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481763697] [2020-04-17 23:03:44,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:44,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:44,265 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-04-17 23:03:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:44,533 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-04-17 23:03:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:44,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:44,534 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:03:44,534 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 23:03:44,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 23:03:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 23:03:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-04-17 23:03:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:03:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-04-17 23:03:44,537 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-04-17 23:03:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:44,537 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-04-17 23:03:44,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-04-17 23:03:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:44,538 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:44,538 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:44,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:44,742 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-04-17 23:03:44,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:44,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649529404] [2020-04-17 23:03:44,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:44,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649529404] [2020-04-17 23:03:44,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368284642] [2020-04-17 23:03:44,925 INFO L92 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 [2020-04-17 23:03:44,979 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:03:44,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:44,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:44,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:45,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:45,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:45,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:45,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035040509] [2020-04-17 23:03:45,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:45,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:45,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:45,010 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-04-17 23:03:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:45,368 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-04-17 23:03:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:45,369 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:45,369 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:03:45,370 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 23:03:45,370 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 23:03:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 23:03:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:03:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-04-17 23:03:45,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-04-17 23:03:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:45,373 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-04-17 23:03:45,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-04-17 23:03:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:45,373 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:45,373 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:45,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:45,577 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-04-17 23:03:45,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:45,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603602300] [2020-04-17 23:03:45,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:45,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603602300] [2020-04-17 23:03:45,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172653386] [2020-04-17 23:03:45,751 INFO L92 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 [2020-04-17 23:03:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:45,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:45,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:45,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:45,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:45,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414895967] [2020-04-17 23:03:45,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:45,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:45,809 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-04-17 23:03:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:46,199 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-04-17 23:03:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:46,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:46,200 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:46,200 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:46,201 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 23:03:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 23:03:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-04-17 23:03:46,204 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-04-17 23:03:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:46,204 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-04-17 23:03:46,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-04-17 23:03:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:46,204 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:46,205 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:46,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:46,408 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-04-17 23:03:46,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:46,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701374705] [2020-04-17 23:03:46,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:46,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701374705] [2020-04-17 23:03:46,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929682676] [2020-04-17 23:03:46,577 INFO L92 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 [2020-04-17 23:03:46,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:46,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:46,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:46,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:46,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:46,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:46,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:46,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95731801] [2020-04-17 23:03:46,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:46,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:46,655 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-04-17 23:03:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:47,105 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-04-17 23:03:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:47,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:47,106 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:03:47,106 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:03:47,107 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:03:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:03:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-04-17 23:03:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:03:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-04-17 23:03:47,109 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-04-17 23:03:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:47,109 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-04-17 23:03:47,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-04-17 23:03:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:47,110 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:47,110 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:47,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:47,311 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-04-17 23:03:47,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:47,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152743576] [2020-04-17 23:03:47,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:47,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152743576] [2020-04-17 23:03:47,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248728407] [2020-04-17 23:03:47,474 INFO L92 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 [2020-04-17 23:03:47,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:03:47,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:47,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:47,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:47,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:47,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:47,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386402009] [2020-04-17 23:03:47,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:47,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:47,534 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-04-17 23:03:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:47,969 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-04-17 23:03:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:47,969 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:47,970 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:03:47,970 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:03:47,971 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:03:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-04-17 23:03:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-04-17 23:03:47,973 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-04-17 23:03:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:47,974 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-04-17 23:03:47,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-04-17 23:03:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:47,975 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:47,975 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:48,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:48,178 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-04-17 23:03:48,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:48,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532491668] [2020-04-17 23:03:48,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:48,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532491668] [2020-04-17 23:03:48,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594102266] [2020-04-17 23:03:48,343 INFO L92 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 [2020-04-17 23:03:48,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:48,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:48,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:48,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:48,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:48,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:48,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:48,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096185746] [2020-04-17 23:03:48,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:48,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:48,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:48,417 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-04-17 23:03:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:48,931 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-04-17 23:03:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:48,931 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:48,932 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:03:48,932 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 23:03:48,933 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:03:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 23:03:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-04-17 23:03:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-04-17 23:03:48,935 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-04-17 23:03:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:48,935 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-04-17 23:03:48,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-04-17 23:03:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:48,935 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:48,936 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:49,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:49,136 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-04-17 23:03:49,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:49,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135801468] [2020-04-17 23:03:49,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:49,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135801468] [2020-04-17 23:03:49,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950047303] [2020-04-17 23:03:49,287 INFO L92 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 [2020-04-17 23:03:49,336 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:03:49,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:49,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:49,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:49,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:49,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:49,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115393638] [2020-04-17 23:03:49,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:49,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:49,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:49,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:49,358 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-04-17 23:03:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:49,893 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-04-17 23:03:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:49,893 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:49,893 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:03:49,894 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:03:49,894 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 23:03:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:03:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-04-17 23:03:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 23:03:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-04-17 23:03:49,896 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-04-17 23:03:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:49,896 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-04-17 23:03:49,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-04-17 23:03:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:49,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:49,897 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:50,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:50,104 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-04-17 23:03:50,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:50,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666934872] [2020-04-17 23:03:50,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:50,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666934872] [2020-04-17 23:03:50,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949001044] [2020-04-17 23:03:50,372 INFO L92 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 [2020-04-17 23:03:50,457 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:03:50,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:50,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:50,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:50,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:50,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:50,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:50,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581705638] [2020-04-17 23:03:50,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:50,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:50,509 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-04-17 23:03:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:51,119 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-04-17 23:03:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:51,119 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:51,120 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:03:51,120 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:03:51,121 INFO L678 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 [2020-04-17 23:03:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:03:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-04-17 23:03:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-04-17 23:03:51,123 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-04-17 23:03:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:51,123 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-04-17 23:03:51,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-04-17 23:03:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:51,124 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:51,124 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:51,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:51,326 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-04-17 23:03:51,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:51,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120677410] [2020-04-17 23:03:51,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:51,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120677410] [2020-04-17 23:03:51,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500662910] [2020-04-17 23:03:51,479 INFO L92 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 [2020-04-17 23:03:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:51,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:51,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:51,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:51,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:51,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491858402] [2020-04-17 23:03:51,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:51,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:51,564 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-04-17 23:03:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:52,076 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-04-17 23:03:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:03:52,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:52,077 INFO L225 Difference]: With dead ends: 115 [2020-04-17 23:03:52,077 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:03:52,078 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:03:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:03:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-04-17 23:03:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 23:03:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-04-17 23:03:52,081 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-04-17 23:03:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:52,081 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-04-17 23:03:52,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-04-17 23:03:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:52,082 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:52,082 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:52,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:52,285 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-04-17 23:03:52,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:52,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567264764] [2020-04-17 23:03:52,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:52,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567264764] [2020-04-17 23:03:52,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306208116] [2020-04-17 23:03:52,437 INFO L92 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 [2020-04-17 23:03:52,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:52,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:52,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:52,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:52,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:52,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:52,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:52,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609717498] [2020-04-17 23:03:52,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:52,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:52,511 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-04-17 23:03:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:53,143 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-04-17 23:03:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:03:53,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:53,144 INFO L225 Difference]: With dead ends: 112 [2020-04-17 23:03:53,144 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 23:03:53,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:03:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 23:03:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-04-17 23:03:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:03:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-04-17 23:03:53,147 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-04-17 23:03:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:53,147 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-04-17 23:03:53,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-04-17 23:03:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:53,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:53,148 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:53,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:53,351 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-04-17 23:03:53,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:53,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078214704] [2020-04-17 23:03:53,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:53,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078214704] [2020-04-17 23:03:53,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970643561] [2020-04-17 23:03:53,483 INFO L92 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 [2020-04-17 23:03:53,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:03:53,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:53,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:53,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:53,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:53,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:53,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86972137] [2020-04-17 23:03:53,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:53,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:53,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:53,551 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-04-17 23:03:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:54,076 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-04-17 23:03:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:54,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:54,077 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:03:54,077 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:03:54,078 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:03:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:03:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-04-17 23:03:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:54,080 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-04-17 23:03:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:54,080 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:54,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:54,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:54,081 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:54,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:54,282 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-04-17 23:03:54,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:54,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789254496] [2020-04-17 23:03:54,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:54,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789254496] [2020-04-17 23:03:54,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290377736] [2020-04-17 23:03:54,420 INFO L92 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 [2020-04-17 23:03:54,468 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:54,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:54,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:54,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:54,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:54,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:54,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:54,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725678297] [2020-04-17 23:03:54,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:54,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:54,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:54,504 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-04-17 23:03:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:55,170 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-04-17 23:03:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:55,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:55,171 INFO L225 Difference]: With dead ends: 110 [2020-04-17 23:03:55,171 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 23:03:55,172 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:03:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 23:03:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-04-17 23:03:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:55,174 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-04-17 23:03:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:55,174 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:55,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:55,175 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:55,175 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:55,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:55,376 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-04-17 23:03:55,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:55,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505935478] [2020-04-17 23:03:55,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:55,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505935478] [2020-04-17 23:03:55,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018078646] [2020-04-17 23:03:55,512 INFO L92 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 [2020-04-17 23:03:55,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:03:55,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:55,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:55,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:55,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:55,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:55,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94896939] [2020-04-17 23:03:55,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:55,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:55,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:55,597 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-04-17 23:03:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:56,409 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-04-17 23:03:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:03:56,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:56,410 INFO L225 Difference]: With dead ends: 111 [2020-04-17 23:03:56,410 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 23:03:56,411 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:03:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 23:03:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-04-17 23:03:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 23:03:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-04-17 23:03:56,414 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-04-17 23:03:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:56,414 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-04-17 23:03:56,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-04-17 23:03:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:56,415 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:56,415 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:56,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:56,620 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-04-17 23:03:56,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:56,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671384869] [2020-04-17 23:03:56,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:56,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671384869] [2020-04-17 23:03:56,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284181203] [2020-04-17 23:03:56,862 INFO L92 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 [2020-04-17 23:03:56,920 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:03:56,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:56,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:03:56,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:56,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:56,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:56,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671977081] [2020-04-17 23:03:56,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:56,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:56,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:56,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:56,956 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-04-17 23:03:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:57,682 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-04-17 23:03:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:03:57,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:57,684 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:03:57,684 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 23:03:57,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=1706, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:03:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 23:03:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-04-17 23:03:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:03:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 23:03:57,686 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-04-17 23:03:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:57,687 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 23:03:57,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 23:03:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:57,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:57,687 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:57,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:57,888 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-04-17 23:03:57,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:57,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039729779] [2020-04-17 23:03:57,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:58,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039729779] [2020-04-17 23:03:58,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434943203] [2020-04-17 23:03:58,045 INFO L92 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 [2020-04-17 23:03:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:58,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:58,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:58,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:58,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:58,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902580042] [2020-04-17 23:03:58,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:58,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:58,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:58,116 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-04-17 23:03:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:58,712 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-04-17 23:03:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:03:58,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:58,713 INFO L225 Difference]: With dead ends: 128 [2020-04-17 23:03:58,713 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 23:03:58,714 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:03:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 23:03:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-04-17 23:03:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:03:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-04-17 23:03:58,716 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-04-17 23:03:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:58,717 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-04-17 23:03:58,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-04-17 23:03:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:58,717 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:58,717 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:58,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:58,918 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-04-17 23:03:58,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:58,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473286238] [2020-04-17 23:03:58,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:59,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473286238] [2020-04-17 23:03:59,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923654430] [2020-04-17 23:03:59,041 INFO L92 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 [2020-04-17 23:03:59,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:59,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:59,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:59,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:59,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:59,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:59,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:59,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177306244] [2020-04-17 23:03:59,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:59,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:59,129 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-04-17 23:03:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:59,890 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-04-17 23:03:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:03:59,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:59,891 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:03:59,891 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:59,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:03:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-04-17 23:03:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 23:03:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-04-17 23:03:59,893 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-04-17 23:03:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:59,894 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-04-17 23:03:59,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-04-17 23:03:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:03:59,894 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:59,894 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:00,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:00,095 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-04-17 23:04:00,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:00,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282805594] [2020-04-17 23:04:00,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:00,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282805594] [2020-04-17 23:04:00,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745670385] [2020-04-17 23:04:00,288 INFO L92 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 [2020-04-17 23:04:00,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:04:00,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:00,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:00,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:00,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:00,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:00,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236168056] [2020-04-17 23:04:00,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:00,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:00,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:00,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:00,356 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-04-17 23:04:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:00,718 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-04-17 23:04:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:04:00,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:00,719 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:04:00,719 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:04:00,719 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:04:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:04:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-04-17 23:04:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:00,722 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:00,722 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:00,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:00,722 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:00,723 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:00,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:00,923 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-04-17 23:04:00,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:00,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855883128] [2020-04-17 23:04:00,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:01,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855883128] [2020-04-17 23:04:01,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289536631] [2020-04-17 23:04:01,139 INFO L92 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 [2020-04-17 23:04:01,189 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:01,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:01,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:01,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:01,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:01,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:01,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:01,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900872946] [2020-04-17 23:04:01,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:01,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:01,222 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:01,636 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 23:04:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:04:01,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:01,637 INFO L225 Difference]: With dead ends: 121 [2020-04-17 23:04:01,638 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 23:04:01,638 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:04:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 23:04:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-04-17 23:04:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:01,640 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:01,641 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:01,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:01,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:01,641 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:01,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:01,842 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-04-17 23:04:01,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:01,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607260842] [2020-04-17 23:04:01,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:02,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607260842] [2020-04-17 23:04:02,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268740807] [2020-04-17 23:04:02,024 INFO L92 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 [2020-04-17 23:04:02,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:02,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:02,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:02,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:02,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:02,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:02,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650134693] [2020-04-17 23:04:02,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:02,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:02,088 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:02,477 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 23:04:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:04:02,478 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:02,479 INFO L225 Difference]: With dead ends: 118 [2020-04-17 23:04:02,479 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 23:04:02,479 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:04:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 23:04:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-04-17 23:04:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:02,481 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:02,482 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:02,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:02,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:02,482 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:02,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:02,683 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-04-17 23:04:02,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:02,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910438968] [2020-04-17 23:04:02,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:02,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910438968] [2020-04-17 23:04:02,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653826799] [2020-04-17 23:04:02,874 INFO L92 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 [2020-04-17 23:04:02,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:02,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:02,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:02,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:02,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:02,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:02,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:02,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656779869] [2020-04-17 23:04:02,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:02,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:02,956 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:03,464 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-04-17 23:04:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:03,465 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:03,465 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:04:03,465 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:04:03,466 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 23:04:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:04:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-04-17 23:04:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:03,469 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:03,469 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:03,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:03,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:03,469 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:03,469 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:03,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:03,670 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-04-17 23:04:03,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:03,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183424718] [2020-04-17 23:04:03,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:03,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183424718] [2020-04-17 23:04:03,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892423217] [2020-04-17 23:04:03,845 INFO L92 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 [2020-04-17 23:04:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:03,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:03,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:03,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:03,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:03,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776191001] [2020-04-17 23:04:03,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:03,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:03,906 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:04,360 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-04-17 23:04:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:04,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:04,361 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:04:04,361 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:04:04,362 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:04:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:04:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-04-17 23:04:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:04,364 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:04,364 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:04,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:04,365 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:04,365 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:04,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:04,568 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-04-17 23:04:04,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:04,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544899057] [2020-04-17 23:04:04,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:04,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544899057] [2020-04-17 23:04:04,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242378846] [2020-04-17 23:04:04,736 INFO L92 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 [2020-04-17 23:04:04,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:04,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:04,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:04,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:04,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:04,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:04,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:04,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505984969] [2020-04-17 23:04:04,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:04,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:04,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:04,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:04,811 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:05,399 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-04-17 23:04:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:04:05,400 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:05,400 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:04:05,401 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:04:05,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:04:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:04:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-04-17 23:04:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:05,403 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:05,404 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:05,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:05,405 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:05,405 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:05,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:05,609 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-04-17 23:04:05,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:05,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825495168] [2020-04-17 23:04:05,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:05,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825495168] [2020-04-17 23:04:05,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844506189] [2020-04-17 23:04:05,778 INFO L92 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 [2020-04-17 23:04:05,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:04:05,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:05,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:05,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:05,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:05,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:05,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130426877] [2020-04-17 23:04:05,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:05,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:05,845 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:06,345 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-04-17 23:04:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:04:06,346 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:06,346 INFO L225 Difference]: With dead ends: 110 [2020-04-17 23:04:06,346 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 23:04:06,347 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:04:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 23:04:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-04-17 23:04:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:06,350 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:06,351 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:06,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:06,351 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:06,351 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:06,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:06,555 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-04-17 23:04:06,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:06,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819679982] [2020-04-17 23:04:06,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819679982] [2020-04-17 23:04:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436965957] [2020-04-17 23:04:06,712 INFO L92 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 [2020-04-17 23:04:06,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:06,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:06,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:06,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:06,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:06,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:06,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:06,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394171233] [2020-04-17 23:04:06,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:06,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:06,802 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:07,445 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-04-17 23:04:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:07,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:07,446 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:04:07,446 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:04:07,446 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:04:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:04:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-04-17 23:04:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:07,449 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:07,449 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:07,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:07,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:07,450 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:07,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:07,651 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-04-17 23:04:07,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:07,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981507912] [2020-04-17 23:04:07,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:07,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981507912] [2020-04-17 23:04:07,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137799402] [2020-04-17 23:04:07,811 INFO L92 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 [2020-04-17 23:04:07,864 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:07,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:07,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:07,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:07,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:07,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:07,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056506740] [2020-04-17 23:04:07,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:07,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:07,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:07,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:07,876 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:08,416 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-04-17 23:04:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:08,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:08,417 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:04:08,417 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 23:04:08,418 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:04:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 23:04:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-04-17 23:04:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:08,420 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:08,420 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:08,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:08,421 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:08,421 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:08,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:08,622 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-04-17 23:04:08,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:08,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498637250] [2020-04-17 23:04:08,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:08,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498637250] [2020-04-17 23:04:08,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328676094] [2020-04-17 23:04:08,786 INFO L92 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 [2020-04-17 23:04:08,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:08,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:08,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:08,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:08,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:08,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:08,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:08,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599895406] [2020-04-17 23:04:08,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:08,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:08,865 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:09,588 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-04-17 23:04:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:09,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:09,589 INFO L225 Difference]: With dead ends: 105 [2020-04-17 23:04:09,589 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 23:04:09,589 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:04:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 23:04:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-04-17 23:04:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:09,592 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:09,592 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:09,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:09,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:09,592 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:09,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:09,793 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-04-17 23:04:09,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:09,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523403283] [2020-04-17 23:04:09,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:09,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523403283] [2020-04-17 23:04:09,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811708820] [2020-04-17 23:04:09,941 INFO L92 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 [2020-04-17 23:04:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:09,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:09,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:10,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:10,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:10,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746546094] [2020-04-17 23:04:10,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:10,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:10,001 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:10,586 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-04-17 23:04:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:04:10,587 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:10,587 INFO L225 Difference]: With dead ends: 102 [2020-04-17 23:04:10,587 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 23:04:10,588 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:04:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 23:04:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-04-17 23:04:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:10,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:10,590 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:10,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:10,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:10,591 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:10,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:10,792 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:10,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:10,792 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-04-17 23:04:10,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:10,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498109592] [2020-04-17 23:04:10,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:10,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498109592] [2020-04-17 23:04:10,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953032188] [2020-04-17 23:04:10,937 INFO L92 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 [2020-04-17 23:04:10,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:10,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:10,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:10,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:11,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:11,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:11,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:11,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233819130] [2020-04-17 23:04:11,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:11,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:11,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:11,014 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:11,812 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 23:04:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:11,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:11,814 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:04:11,814 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:04:11,814 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:04:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:04:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-04-17 23:04:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:11,816 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:11,817 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:11,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:11,817 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:11,817 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:12,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:12,019 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-04-17 23:04:12,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:12,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78278907] [2020-04-17 23:04:12,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:12,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78278907] [2020-04-17 23:04:12,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368926862] [2020-04-17 23:04:12,177 INFO L92 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 [2020-04-17 23:04:12,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:04:12,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:12,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:12,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:12,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:12,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:12,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017634577] [2020-04-17 23:04:12,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:12,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:12,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:12,264 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:12,889 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-04-17 23:04:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:04:12,890 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:12,890 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:04:12,890 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:04:12,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:04:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:04:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-04-17 23:04:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:12,893 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:12,893 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:12,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:12,894 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:12,894 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:13,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:13,095 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-04-17 23:04:13,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:13,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825897188] [2020-04-17 23:04:13,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:13,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825897188] [2020-04-17 23:04:13,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135930104] [2020-04-17 23:04:13,240 INFO L92 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 [2020-04-17 23:04:13,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:13,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:13,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:13,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:13,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:13,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:13,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:13,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855998092] [2020-04-17 23:04:13,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:13,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:13,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:13,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:13,353 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:14,212 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-04-17 23:04:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:14,213 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:14,213 INFO L225 Difference]: With dead ends: 97 [2020-04-17 23:04:14,213 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:04:14,214 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 23:04:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:04:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-04-17 23:04:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:14,216 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:14,216 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:14,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:14,217 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:14,217 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:14,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:14,418 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-04-17 23:04:14,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:14,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440554807] [2020-04-17 23:04:14,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:14,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440554807] [2020-04-17 23:04:14,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043881642] [2020-04-17 23:04:14,554 INFO L92 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 [2020-04-17 23:04:14,611 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:14,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:14,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:14,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:14,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:14,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:14,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531234357] [2020-04-17 23:04:14,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:14,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:14,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:14,636 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:15,272 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 23:04:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:15,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:15,273 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:04:15,274 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:04:15,274 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:04:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:04:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-04-17 23:04:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 23:04:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-04-17 23:04:15,276 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-04-17 23:04:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:15,276 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-04-17 23:04:15,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-04-17 23:04:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:15,277 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:15,277 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:15,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:15,478 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:15,478 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-04-17 23:04:15,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:15,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932768106] [2020-04-17 23:04:15,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:15,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932768106] [2020-04-17 23:04:15,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305236819] [2020-04-17 23:04:15,623 INFO L92 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 [2020-04-17 23:04:15,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:15,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:15,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:15,682 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:15,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:15,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:15,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:15,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777380260] [2020-04-17 23:04:15,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:15,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:15,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:15,710 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-04-17 23:04:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:16,596 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-04-17 23:04:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:04:16,597 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:16,597 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:04:16,597 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 23:04:16,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:04:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 23:04:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-04-17 23:04:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:04:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-04-17 23:04:16,600 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-04-17 23:04:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:16,600 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-04-17 23:04:16,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-04-17 23:04:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:16,601 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:16,601 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:16,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:16,802 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-04-17 23:04:16,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:16,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881598672] [2020-04-17 23:04:16,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:16,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881598672] [2020-04-17 23:04:16,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944069829] [2020-04-17 23:04:16,941 INFO L92 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 [2020-04-17 23:04:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:16,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:16,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:17,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:17,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:17,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:17,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330579283] [2020-04-17 23:04:17,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:17,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:17,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:17,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:17,019 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-04-17 23:04:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:17,835 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 23:04:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:17,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:17,836 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:04:17,836 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:04:17,836 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:04:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:04:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-04-17 23:04:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:04:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 23:04:17,839 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-04-17 23:04:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:17,839 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 23:04:17,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 23:04:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:17,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:17,840 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:18,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:18,043 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-04-17 23:04:18,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:18,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444285847] [2020-04-17 23:04:18,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:18,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444285847] [2020-04-17 23:04:18,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092016178] [2020-04-17 23:04:18,191 INFO L92 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 [2020-04-17 23:04:18,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:18,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:18,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:18,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:18,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:18,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:18,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:18,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365053205] [2020-04-17 23:04:18,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:18,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:18,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:18,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:18,273 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-04-17 23:04:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:19,145 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-04-17 23:04:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:19,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:19,146 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:04:19,146 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:04:19,147 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:04:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:04:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 23:04:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:04:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-04-17 23:04:19,149 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-04-17 23:04:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:19,149 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-04-17 23:04:19,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-04-17 23:04:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:19,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:19,150 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:19,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:19,351 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-04-17 23:04:19,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:19,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841981972] [2020-04-17 23:04:19,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:19,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841981972] [2020-04-17 23:04:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977721375] [2020-04-17 23:04:19,548 INFO L92 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 [2020-04-17 23:04:19,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:19,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:19,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:19,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:19,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:19,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:19,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38737660] [2020-04-17 23:04:19,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:19,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:19,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:19,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:19,613 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-04-17 23:04:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:19,954 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-04-17 23:04:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:04:19,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:19,956 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:04:19,956 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:04:19,956 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:04:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:04:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-04-17 23:04:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:04:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-04-17 23:04:19,958 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-04-17 23:04:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:19,959 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-04-17 23:04:19,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-04-17 23:04:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:19,960 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:19,960 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:20,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:20,163 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-04-17 23:04:20,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:20,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777121966] [2020-04-17 23:04:20,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:20,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777121966] [2020-04-17 23:04:20,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014455333] [2020-04-17 23:04:20,366 INFO L92 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 [2020-04-17 23:04:20,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:20,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:20,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:20,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:20,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:20,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:20,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:20,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785591076] [2020-04-17 23:04:20,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:20,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:20,438 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-04-17 23:04:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:20,858 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-04-17 23:04:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:04:20,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:20,860 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:04:20,860 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:04:20,860 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:04:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:04:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-04-17 23:04:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:04:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-04-17 23:04:20,862 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-04-17 23:04:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:20,863 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-04-17 23:04:20,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-04-17 23:04:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:20,863 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:20,863 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:21,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:21,064 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-04-17 23:04:21,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:21,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473554810] [2020-04-17 23:04:21,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:21,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473554810] [2020-04-17 23:04:21,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297820481] [2020-04-17 23:04:21,267 INFO L92 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 [2020-04-17 23:04:21,321 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:21,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:21,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:21,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:21,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:21,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:21,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992133781] [2020-04-17 23:04:21,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:21,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:21,333 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-04-17 23:04:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:21,781 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-04-17 23:04:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:21,781 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:21,782 INFO L225 Difference]: With dead ends: 115 [2020-04-17 23:04:21,782 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:04:21,782 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:04:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:04:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-04-17 23:04:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 23:04:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-04-17 23:04:21,784 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-04-17 23:04:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:21,785 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-04-17 23:04:21,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-04-17 23:04:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:21,786 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:21,786 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:21,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:21,987 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-04-17 23:04:21,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:21,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976802564] [2020-04-17 23:04:21,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:22,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976802564] [2020-04-17 23:04:22,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941573313] [2020-04-17 23:04:22,186 INFO L92 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 [2020-04-17 23:04:22,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:22,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:22,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:22,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:22,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:22,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:22,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:22,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010453397] [2020-04-17 23:04:22,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:22,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:22,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:22,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:22,268 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-04-17 23:04:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:22,776 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-04-17 23:04:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:22,776 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:22,777 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:04:22,777 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:04:22,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:04:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:04:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-04-17 23:04:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:04:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-04-17 23:04:22,780 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-04-17 23:04:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:22,781 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-04-17 23:04:22,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-04-17 23:04:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:22,781 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:22,781 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:22,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:22,985 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-04-17 23:04:22,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:22,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637963424] [2020-04-17 23:04:22,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:23,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637963424] [2020-04-17 23:04:23,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789023846] [2020-04-17 23:04:23,180 INFO L92 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 [2020-04-17 23:04:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:23,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:23,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:23,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:23,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:23,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736741714] [2020-04-17 23:04:23,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:23,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:23,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:23,242 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-04-17 23:04:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:23,738 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-04-17 23:04:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:04:23,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:23,739 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:04:23,739 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:04:23,740 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:04:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:04:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-04-17 23:04:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 23:04:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-04-17 23:04:23,742 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-04-17 23:04:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:23,742 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-04-17 23:04:23,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-04-17 23:04:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:23,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:23,742 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:23,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:23,943 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-04-17 23:04:23,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:23,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299354856] [2020-04-17 23:04:23,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:24,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299354856] [2020-04-17 23:04:24,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476767312] [2020-04-17 23:04:24,133 INFO L92 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 [2020-04-17 23:04:24,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:24,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:24,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:24,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:24,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:24,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:24,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:24,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11533638] [2020-04-17 23:04:24,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:24,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:24,212 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-04-17 23:04:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:24,776 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-04-17 23:04:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:04:24,777 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:24,777 INFO L225 Difference]: With dead ends: 126 [2020-04-17 23:04:24,777 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 23:04:24,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:04:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 23:04:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-04-17 23:04:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:04:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-04-17 23:04:24,780 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-04-17 23:04:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:24,781 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-04-17 23:04:24,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-04-17 23:04:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:24,781 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:24,781 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:24,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:24,984 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-04-17 23:04:24,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:24,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871333734] [2020-04-17 23:04:24,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:25,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871333734] [2020-04-17 23:04:25,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074310430] [2020-04-17 23:04:25,163 INFO L92 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 [2020-04-17 23:04:25,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:25,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:25,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:25,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:25,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:25,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:25,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657794185] [2020-04-17 23:04:25,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:25,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:25,236 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-04-17 23:04:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:25,754 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-04-17 23:04:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:25,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:25,755 INFO L225 Difference]: With dead ends: 127 [2020-04-17 23:04:25,756 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 23:04:25,756 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:04:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 23:04:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-04-17 23:04:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:04:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-04-17 23:04:25,758 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-04-17 23:04:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:25,759 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-04-17 23:04:25,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-04-17 23:04:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:25,759 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:25,759 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:25,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:25,960 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-04-17 23:04:25,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:25,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441607229] [2020-04-17 23:04:25,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:26,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441607229] [2020-04-17 23:04:26,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742701327] [2020-04-17 23:04:26,145 INFO L92 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 [2020-04-17 23:04:26,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:26,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:26,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:26,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:26,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:26,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:26,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:26,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658517172] [2020-04-17 23:04:26,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:26,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:26,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:26,219 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-04-17 23:04:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:26,845 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-04-17 23:04:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:26,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:26,846 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:04:26,846 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:04:26,847 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:04:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:04:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-04-17 23:04:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:04:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-04-17 23:04:26,849 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-04-17 23:04:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:26,849 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-04-17 23:04:26,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-04-17 23:04:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:26,850 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:26,850 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:27,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:27,051 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-04-17 23:04:27,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:27,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653340376] [2020-04-17 23:04:27,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:27,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653340376] [2020-04-17 23:04:27,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768562032] [2020-04-17 23:04:27,218 INFO L92 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 [2020-04-17 23:04:27,278 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:27,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:27,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:27,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:27,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:27,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:27,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332124928] [2020-04-17 23:04:27,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:27,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:27,330 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-04-17 23:04:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:27,887 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-04-17 23:04:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:04:27,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:27,889 INFO L225 Difference]: With dead ends: 125 [2020-04-17 23:04:27,889 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 23:04:27,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:04:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 23:04:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-04-17 23:04:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 23:04:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-04-17 23:04:27,892 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-04-17 23:04:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:27,892 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-04-17 23:04:27,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-04-17 23:04:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:27,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:27,893 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:28,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:28,093 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-04-17 23:04:28,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:28,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42933613] [2020-04-17 23:04:28,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:28,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42933613] [2020-04-17 23:04:28,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500308002] [2020-04-17 23:04:28,289 INFO L92 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 [2020-04-17 23:04:28,351 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:28,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:28,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:28,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:28,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:28,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:28,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:28,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119600821] [2020-04-17 23:04:28,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:28,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:28,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:28,378 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-04-17 23:04:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:29,082 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-04-17 23:04:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:29,083 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:29,083 INFO L225 Difference]: With dead ends: 122 [2020-04-17 23:04:29,083 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 23:04:29,084 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:04:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 23:04:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-04-17 23:04:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:04:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-04-17 23:04:29,086 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-04-17 23:04:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:29,086 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-04-17 23:04:29,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-04-17 23:04:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:29,087 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:29,087 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:29,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:29,288 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-04-17 23:04:29,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:29,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306758531] [2020-04-17 23:04:29,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:29,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306758531] [2020-04-17 23:04:29,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273669668] [2020-04-17 23:04:29,448 INFO L92 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 [2020-04-17 23:04:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:29,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:29,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:29,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:29,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:29,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132266670] [2020-04-17 23:04:29,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:29,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:29,510 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-04-17 23:04:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:30,130 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 23:04:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:04:30,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:30,132 INFO L225 Difference]: With dead ends: 123 [2020-04-17 23:04:30,132 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:04:30,132 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:04:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:04:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-04-17 23:04:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 23:04:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-04-17 23:04:30,135 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-04-17 23:04:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:30,135 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-04-17 23:04:30,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-04-17 23:04:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:30,136 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:30,136 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:30,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:30,337 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-04-17 23:04:30,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:30,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512374722] [2020-04-17 23:04:30,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:30,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512374722] [2020-04-17 23:04:30,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644897411] [2020-04-17 23:04:30,508 INFO L92 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 [2020-04-17 23:04:30,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:30,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:30,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:30,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:30,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:30,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:30,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:30,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551235173] [2020-04-17 23:04:30,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:30,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:30,587 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-04-17 23:04:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:31,354 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-04-17 23:04:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:31,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:31,355 INFO L225 Difference]: With dead ends: 120 [2020-04-17 23:04:31,355 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 23:04:31,356 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:04:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 23:04:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-04-17 23:04:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 23:04:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-04-17 23:04:31,358 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-04-17 23:04:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:31,358 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-04-17 23:04:31,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-04-17 23:04:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:31,358 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:31,359 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:31,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:31,559 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:31,560 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-04-17 23:04:31,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:31,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660073283] [2020-04-17 23:04:31,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:31,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660073283] [2020-04-17 23:04:31,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638925025] [2020-04-17 23:04:31,721 INFO L92 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 [2020-04-17 23:04:31,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:31,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:31,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:31,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:31,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:31,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:31,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601000315] [2020-04-17 23:04:31,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:31,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:31,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:31,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:31,792 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-04-17 23:04:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:32,444 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 23:04:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:32,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:32,445 INFO L225 Difference]: With dead ends: 121 [2020-04-17 23:04:32,445 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 23:04:32,446 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 23:04:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 23:04:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-04-17 23:04:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:32,448 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-04-17 23:04:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:32,448 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:32,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:32,448 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:32,448 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:32,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:32,649 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-04-17 23:04:32,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:32,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849382949] [2020-04-17 23:04:32,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:32,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849382949] [2020-04-17 23:04:32,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900545709] [2020-04-17 23:04:32,805 INFO L92 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 [2020-04-17 23:04:32,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:32,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:32,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:32,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:32,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:32,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:32,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:32,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449167847] [2020-04-17 23:04:32,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:32,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:32,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:32,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:32,895 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-04-17 23:04:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:33,712 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 23:04:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:33,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:33,713 INFO L225 Difference]: With dead ends: 118 [2020-04-17 23:04:33,713 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 23:04:33,714 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 23:04:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 23:04:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-04-17 23:04:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:33,716 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-04-17 23:04:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:33,716 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:33,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:33,717 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:33,717 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:33,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:33,918 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-04-17 23:04:33,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:33,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123868314] [2020-04-17 23:04:33,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:34,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123868314] [2020-04-17 23:04:34,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314088358] [2020-04-17 23:04:34,084 INFO L92 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 [2020-04-17 23:04:34,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:34,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:34,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:34,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:34,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:34,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:34,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204669947] [2020-04-17 23:04:34,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:34,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:34,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:34,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:34,156 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-04-17 23:04:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:34,862 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-04-17 23:04:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:04:34,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:34,863 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:04:34,863 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:04:34,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:04:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:04:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-04-17 23:04:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 23:04:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-04-17 23:04:34,867 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-04-17 23:04:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:34,867 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-04-17 23:04:34,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-04-17 23:04:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:34,868 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:34,868 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:35,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:35,069 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-04-17 23:04:35,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:35,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221953404] [2020-04-17 23:04:35,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:35,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221953404] [2020-04-17 23:04:35,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023015806] [2020-04-17 23:04:35,236 INFO L92 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 [2020-04-17 23:04:35,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:35,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:35,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:04:35,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:35,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:35,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:35,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659584734] [2020-04-17 23:04:35,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:35,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:35,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:35,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:35,324 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-04-17 23:04:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:36,209 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-04-17 23:04:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:04:36,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:36,210 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:04:36,210 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 23:04:36,211 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=812, Invalid=2158, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:04:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 23:04:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-04-17 23:04:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:04:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 23:04:36,213 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-04-17 23:04:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:36,213 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 23:04:36,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 23:04:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:36,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:36,214 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:36,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:36,415 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-04-17 23:04:36,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:36,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970962088] [2020-04-17 23:04:36,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:36,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970962088] [2020-04-17 23:04:36,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81097079] [2020-04-17 23:04:36,565 INFO L92 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 [2020-04-17 23:04:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:36,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:36,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:36,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:36,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:36,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404861081] [2020-04-17 23:04:36,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:36,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:36,628 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-04-17 23:04:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:37,360 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-04-17 23:04:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:04:37,360 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:37,361 INFO L225 Difference]: With dead ends: 136 [2020-04-17 23:04:37,361 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 23:04:37,362 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 23:04:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 23:04:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-04-17 23:04:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 23:04:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-04-17 23:04:37,364 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-04-17 23:04:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:37,364 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-04-17 23:04:37,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-04-17 23:04:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:37,365 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:37,365 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:37,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:37,568 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-04-17 23:04:37,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:37,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134860845] [2020-04-17 23:04:37,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134860845] [2020-04-17 23:04:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973857666] [2020-04-17 23:04:37,726 INFO L92 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 [2020-04-17 23:04:37,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:37,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:37,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:37,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:37,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:37,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:37,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839503029] [2020-04-17 23:04:37,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:37,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:37,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:37,810 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-04-17 23:04:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:38,710 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-04-17 23:04:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:04:38,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:38,711 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:04:38,711 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:04:38,711 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:04:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:04:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-04-17 23:04:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 23:04:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-04-17 23:04:38,714 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-04-17 23:04:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:38,714 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-04-17 23:04:38,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-04-17 23:04:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:38,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:38,714 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:38,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:38,915 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:38,916 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-04-17 23:04:38,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:38,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863964693] [2020-04-17 23:04:38,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:39,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863964693] [2020-04-17 23:04:39,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307538435] [2020-04-17 23:04:39,134 INFO L92 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 [2020-04-17 23:04:39,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:39,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:39,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:39,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:39,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:39,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:39,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111046603] [2020-04-17 23:04:39,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:39,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:39,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:39,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:39,196 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-04-17 23:04:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:39,611 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-04-17 23:04:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:04:39,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:39,612 INFO L225 Difference]: With dead ends: 134 [2020-04-17 23:04:39,612 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 23:04:39,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:04:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 23:04:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-04-17 23:04:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:39,615 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:39,615 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:39,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:39,623 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:39,623 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:39,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:39,824 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-04-17 23:04:39,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:39,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160500055] [2020-04-17 23:04:39,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:40,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160500055] [2020-04-17 23:04:40,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022139655] [2020-04-17 23:04:40,054 INFO L92 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 [2020-04-17 23:04:40,107 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:40,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:40,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:40,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:40,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:40,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:40,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:40,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590039884] [2020-04-17 23:04:40,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:40,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:40,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:40,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:40,134 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:40,620 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-04-17 23:04:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:40,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:40,621 INFO L225 Difference]: With dead ends: 131 [2020-04-17 23:04:40,621 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 23:04:40,622 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:04:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 23:04:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-04-17 23:04:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:40,624 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:40,624 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:40,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:40,625 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:40,625 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:40,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:40,827 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-04-17 23:04:40,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:40,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104656126] [2020-04-17 23:04:40,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:41,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104656126] [2020-04-17 23:04:41,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852652846] [2020-04-17 23:04:41,060 INFO L92 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 [2020-04-17 23:04:41,113 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:41,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:41,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:41,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:41,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:41,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:41,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471429221] [2020-04-17 23:04:41,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:41,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:41,138 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:41,549 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-04-17 23:04:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:41,550 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:41,550 INFO L225 Difference]: With dead ends: 128 [2020-04-17 23:04:41,550 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 23:04:41,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:04:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 23:04:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-04-17 23:04:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:41,553 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:41,554 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:41,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:41,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:41,554 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:41,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:41,755 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-04-17 23:04:41,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:41,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924277631] [2020-04-17 23:04:41,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:41,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924277631] [2020-04-17 23:04:41,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647455173] [2020-04-17 23:04:41,977 INFO L92 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 [2020-04-17 23:04:42,033 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:42,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:42,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:42,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:42,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:42,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:42,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:42,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441201268] [2020-04-17 23:04:42,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:42,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:42,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:42,065 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:42,641 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-04-17 23:04:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:04:42,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:42,642 INFO L225 Difference]: With dead ends: 127 [2020-04-17 23:04:42,643 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 23:04:42,643 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:04:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 23:04:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-04-17 23:04:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:42,645 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:42,646 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:42,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:42,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:42,646 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:42,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:42,847 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-04-17 23:04:42,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:42,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017343108] [2020-04-17 23:04:42,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:43,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017343108] [2020-04-17 23:04:43,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123521538] [2020-04-17 23:04:43,045 INFO L92 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 [2020-04-17 23:04:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:43,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:43,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:43,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:43,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:43,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298440705] [2020-04-17 23:04:43,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:43,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:43,110 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:43,637 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-04-17 23:04:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:04:43,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:43,643 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:04:43,643 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:04:43,643 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:04:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:04:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-04-17 23:04:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:43,644 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:43,645 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:43,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:43,645 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:43,645 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:43,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:43,846 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-04-17 23:04:43,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:43,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668626971] [2020-04-17 23:04:43,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:44,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668626971] [2020-04-17 23:04:44,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798443082] [2020-04-17 23:04:44,059 INFO L92 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 [2020-04-17 23:04:44,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:44,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:44,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:44,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:44,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:44,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:44,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:44,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810955517] [2020-04-17 23:04:44,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:44,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:44,139 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:44,797 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-04-17 23:04:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:44,798 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:44,798 INFO L225 Difference]: With dead ends: 123 [2020-04-17 23:04:44,799 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:04:44,799 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:04:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:04:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-04-17 23:04:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:44,802 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:44,802 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:44,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:44,802 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:44,802 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:45,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:45,003 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-04-17 23:04:45,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:45,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260411277] [2020-04-17 23:04:45,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:45,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260411277] [2020-04-17 23:04:45,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142790259] [2020-04-17 23:04:45,219 INFO L92 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 [2020-04-17 23:04:45,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:45,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:45,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:45,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:45,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:45,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:45,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326078854] [2020-04-17 23:04:45,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:45,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:45,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:45,288 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:45,843 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 23:04:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:45,843 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:45,844 INFO L225 Difference]: With dead ends: 120 [2020-04-17 23:04:45,844 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 23:04:45,844 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:04:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 23:04:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-04-17 23:04:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:45,847 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:45,847 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:45,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:45,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:45,848 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:46,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:46,048 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-04-17 23:04:46,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:46,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345952108] [2020-04-17 23:04:46,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:46,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345952108] [2020-04-17 23:04:46,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452777996] [2020-04-17 23:04:46,241 INFO L92 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 [2020-04-17 23:04:46,292 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:46,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:46,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:46,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:46,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:46,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:46,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:46,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866895985] [2020-04-17 23:04:46,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:46,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:46,324 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:47,052 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-04-17 23:04:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:47,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:47,054 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:04:47,054 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:04:47,054 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:04:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:04:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-04-17 23:04:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:47,058 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:47,059 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:47,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:47,059 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:47,059 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:47,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:47,263 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-04-17 23:04:47,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:47,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287320129] [2020-04-17 23:04:47,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:47,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287320129] [2020-04-17 23:04:47,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610183091] [2020-04-17 23:04:47,448 INFO L92 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 [2020-04-17 23:04:47,504 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:47,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:47,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:47,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:47,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:47,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:47,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769964204] [2020-04-17 23:04:47,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:47,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:47,516 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:48,124 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-04-17 23:04:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:04:48,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:48,125 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:04:48,126 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 23:04:48,126 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:04:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 23:04:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-04-17 23:04:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:48,128 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:48,128 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:48,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:48,129 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:48,129 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:48,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:48,330 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-04-17 23:04:48,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:48,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091599624] [2020-04-17 23:04:48,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:48,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091599624] [2020-04-17 23:04:48,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003036032] [2020-04-17 23:04:48,519 INFO L92 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 [2020-04-17 23:04:48,575 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:48,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:48,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:48,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:48,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:48,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:48,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:48,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466481686] [2020-04-17 23:04:48,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:48,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:48,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:48,603 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:49,386 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-04-17 23:04:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:49,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:49,387 INFO L225 Difference]: With dead ends: 115 [2020-04-17 23:04:49,387 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:04:49,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 23:04:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:04:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-04-17 23:04:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:49,392 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:49,393 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:49,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:49,393 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:49,393 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:49,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:49,597 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-04-17 23:04:49,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:49,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074579934] [2020-04-17 23:04:49,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:49,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074579934] [2020-04-17 23:04:49,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792656820] [2020-04-17 23:04:49,781 INFO L92 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 [2020-04-17 23:04:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:49,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:49,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:49,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:49,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:49,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737523405] [2020-04-17 23:04:49,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:49,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:49,842 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:50,492 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-04-17 23:04:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:04:50,493 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:50,494 INFO L225 Difference]: With dead ends: 112 [2020-04-17 23:04:50,494 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 23:04:50,494 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:04:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 23:04:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-04-17 23:04:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:50,497 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:50,497 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:50,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:50,497 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:50,498 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:50,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:50,698 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-04-17 23:04:50,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:50,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689834192] [2020-04-17 23:04:50,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:50,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689834192] [2020-04-17 23:04:50,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114693322] [2020-04-17 23:04:50,877 INFO L92 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 [2020-04-17 23:04:50,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:50,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:50,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:50,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:50,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:50,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:50,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:50,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204255565] [2020-04-17 23:04:50,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:50,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:50,960 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:51,823 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-04-17 23:04:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:51,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:51,824 INFO L225 Difference]: With dead ends: 111 [2020-04-17 23:04:51,824 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 23:04:51,824 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:04:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 23:04:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-04-17 23:04:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:51,826 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:51,826 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:51,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:51,827 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:51,827 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:52,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:52,028 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-04-17 23:04:52,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:52,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523171138] [2020-04-17 23:04:52,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:52,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523171138] [2020-04-17 23:04:52,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686955020] [2020-04-17 23:04:52,199 INFO L92 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 [2020-04-17 23:04:52,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:52,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:52,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:52,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:52,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:52,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:52,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933703532] [2020-04-17 23:04:52,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:52,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:52,278 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:52,982 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 23:04:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:52,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:52,983 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:04:52,983 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 23:04:52,983 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 23:04:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 23:04:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-04-17 23:04:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:52,986 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:52,986 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:52,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:52,986 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:52,986 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:53,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:53,190 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:53,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:53,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-04-17 23:04:53,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:53,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263583673] [2020-04-17 23:04:53,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:53,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263583673] [2020-04-17 23:04:53,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011380478] [2020-04-17 23:04:53,363 INFO L92 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 [2020-04-17 23:04:53,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:53,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:53,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:53,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:53,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:53,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:53,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:53,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296608468] [2020-04-17 23:04:53,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:53,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:53,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:53,452 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:54,383 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 23:04:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:04:54,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:54,384 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:04:54,384 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:04:54,385 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 23:04:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:04:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-04-17 23:04:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:54,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:54,387 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:54,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:54,388 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:54,388 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:54,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:54,591 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:54,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-04-17 23:04:54,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:54,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119690818] [2020-04-17 23:04:54,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:54,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119690818] [2020-04-17 23:04:54,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805935663] [2020-04-17 23:04:54,761 INFO L92 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 [2020-04-17 23:04:54,814 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:54,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:54,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:54,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:54,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:54,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:54,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509892353] [2020-04-17 23:04:54,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:54,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:54,829 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:55,566 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-04-17 23:04:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:04:55,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:55,567 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:04:55,567 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:04:55,568 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:04:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:04:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-04-17 23:04:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:55,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:55,571 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:55,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:55,571 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:55,571 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:55,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:55,772 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-04-17 23:04:55,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:55,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120028094] [2020-04-17 23:04:55,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:55,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120028094] [2020-04-17 23:04:55,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045476230] [2020-04-17 23:04:55,939 INFO L92 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 [2020-04-17 23:04:56,002 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:56,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:56,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:56,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:56,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:56,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:56,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:56,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554893475] [2020-04-17 23:04:56,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:56,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:56,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:56,037 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:57,048 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-04-17 23:04:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:04:57,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:57,049 INFO L225 Difference]: With dead ends: 103 [2020-04-17 23:04:57,049 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 23:04:57,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 23:04:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 23:04:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-04-17 23:04:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:57,052 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:57,052 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:57,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:57,053 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:57,053 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:57,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:57,254 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-04-17 23:04:57,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:57,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870876259] [2020-04-17 23:04:57,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:57,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870876259] [2020-04-17 23:04:57,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80553964] [2020-04-17 23:04:57,427 INFO L92 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 [2020-04-17 23:04:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:57,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:57,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:57,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:57,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:57,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581518963] [2020-04-17 23:04:57,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:57,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:57,502 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:58,288 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-04-17 23:04:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:04:58,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:58,289 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:04:58,289 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:04:58,290 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:04:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:04:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-04-17 23:04:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 23:04:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-04-17 23:04:58,292 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-04-17 23:04:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:58,292 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-04-17 23:04:58,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-04-17 23:04:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:58,293 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:58,293 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:58,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:58,494 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-04-17 23:04:58,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:58,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561064207] [2020-04-17 23:04:58,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:58,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561064207] [2020-04-17 23:04:58,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956265425] [2020-04-17 23:04:58,664 INFO L92 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 [2020-04-17 23:04:58,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:58,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:58,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:58,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:58,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:58,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:58,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584345192] [2020-04-17 23:04:58,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:58,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:58,754 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-04-17 23:04:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:59,775 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-04-17 23:04:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 23:04:59,775 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:59,776 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:04:59,776 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:04:59,776 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 23:04:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:04:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-04-17 23:04:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 23:04:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-04-17 23:04:59,778 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-04-17 23:04:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:59,778 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-04-17 23:04:59,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-04-17 23:04:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:59,779 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:59,779 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:59,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:59,982 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:59,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-04-17 23:04:59,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:59,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944665692] [2020-04-17 23:04:59,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:00,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944665692] [2020-04-17 23:05:00,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715170838] [2020-04-17 23:05:00,150 INFO L92 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 [2020-04-17 23:05:00,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:05:00,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:00,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:05:00,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:00,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:00,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:00,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:05:00,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174441514] [2020-04-17 23:05:00,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:00,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:00,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:00,245 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-04-17 23:05:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:01,201 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-04-17 23:05:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:01,201 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:05:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:01,202 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:05:01,202 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:05:01,202 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 23:05:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:05:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-04-17 23:05:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 23:05:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 23:05:01,204 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-04-17 23:05:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:01,205 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 23:05:01,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 23:05:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:01,205 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:01,205 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:01,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:01,406 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-04-17 23:05:01,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:01,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732534549] [2020-04-17 23:05:01,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:01,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732534549] [2020-04-17 23:05:01,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542532227] [2020-04-17 23:05:01,581 INFO L92 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 [2020-04-17 23:05:01,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:01,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:01,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:01,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:01,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:01,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:01,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:01,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288467799] [2020-04-17 23:05:01,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:01,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:01,666 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-04-17 23:05:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:02,681 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-04-17 23:05:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:02,682 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:02,682 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:05:02,682 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:05:02,683 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 23:05:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:05:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-04-17 23:05:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:05:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-04-17 23:05:02,685 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-04-17 23:05:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:02,685 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-04-17 23:05:02,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-04-17 23:05:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:02,686 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:02,686 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:02,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:02,887 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-04-17 23:05:02,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:02,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442223942] [2020-04-17 23:05:02,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:03,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442223942] [2020-04-17 23:05:03,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242301487] [2020-04-17 23:05:03,127 INFO L92 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 [2020-04-17 23:05:03,184 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:03,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:03,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:03,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:03,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:03,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:03,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266446756] [2020-04-17 23:05:03,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:03,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:03,194 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-04-17 23:05:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:03,649 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-04-17 23:05:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:05:03,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:03,650 INFO L225 Difference]: With dead ends: 102 [2020-04-17 23:05:03,650 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 23:05:03,650 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 23:05:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 23:05:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-04-17 23:05:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:05:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-04-17 23:05:03,652 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-04-17 23:05:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:03,653 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-04-17 23:05:03,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-04-17 23:05:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:03,653 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:03,653 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:03,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:03,854 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-04-17 23:05:03,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:03,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667486594] [2020-04-17 23:05:03,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:04,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667486594] [2020-04-17 23:05:04,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450713271] [2020-04-17 23:05:04,115 INFO L92 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 [2020-04-17 23:05:04,173 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:04,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:04,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:04,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:04,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:04,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:04,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:04,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27432625] [2020-04-17 23:05:04,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:04,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:04,198 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-04-17 23:05:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:04,678 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-04-17 23:05:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:05:04,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:04,679 INFO L225 Difference]: With dead ends: 122 [2020-04-17 23:05:04,679 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 23:05:04,680 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:05:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 23:05:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-04-17 23:05:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:05:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-04-17 23:05:04,682 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-04-17 23:05:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:04,682 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-04-17 23:05:04,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-04-17 23:05:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:04,683 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:04,683 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:04,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:04,884 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-04-17 23:05:04,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:04,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469426796] [2020-04-17 23:05:04,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:05,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469426796] [2020-04-17 23:05:05,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283334774] [2020-04-17 23:05:05,132 INFO L92 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 [2020-04-17 23:05:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:05,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:05,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:05,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:05,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:05,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148705009] [2020-04-17 23:05:05,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:05,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:05,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:05,194 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-04-17 23:05:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:05,719 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-04-17 23:05:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:05:05,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:05,720 INFO L225 Difference]: With dead ends: 123 [2020-04-17 23:05:05,721 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:05:05,721 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:05:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:05:05,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-04-17 23:05:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:05:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-04-17 23:05:05,724 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-04-17 23:05:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:05,724 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-04-17 23:05:05,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-04-17 23:05:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:05,725 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:05,725 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:05,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:05,928 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-04-17 23:05:05,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:05,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239907939] [2020-04-17 23:05:05,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:06,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239907939] [2020-04-17 23:05:06,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994051606] [2020-04-17 23:05:06,167 INFO L92 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 [2020-04-17 23:05:06,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:06,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:06,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:06,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:06,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:06,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:06,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:06,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196194500] [2020-04-17 23:05:06,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:06,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:06,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:06,247 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-04-17 23:05:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:06,809 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-04-17 23:05:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:05:06,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:06,810 INFO L225 Difference]: With dead ends: 139 [2020-04-17 23:05:06,810 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 23:05:06,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:05:06,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 23:05:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-04-17 23:05:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:05:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-04-17 23:05:06,814 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-04-17 23:05:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:06,814 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-04-17 23:05:06,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-04-17 23:05:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:06,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:06,815 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:07,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:07,018 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-04-17 23:05:07,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:07,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663456160] [2020-04-17 23:05:07,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:07,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663456160] [2020-04-17 23:05:07,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220334818] [2020-04-17 23:05:07,250 INFO L92 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 [2020-04-17 23:05:07,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:07,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:07,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:07,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:07,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:07,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:07,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028313642] [2020-04-17 23:05:07,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:07,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:07,324 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-04-17 23:05:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:07,876 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-04-17 23:05:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:05:07,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:07,877 INFO L225 Difference]: With dead ends: 139 [2020-04-17 23:05:07,877 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 23:05:07,877 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:05:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 23:05:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-04-17 23:05:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 23:05:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-04-17 23:05:07,880 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-04-17 23:05:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:07,880 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-04-17 23:05:07,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-04-17 23:05:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:07,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:07,881 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:08,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:08,081 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:08,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-04-17 23:05:08,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:08,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163940234] [2020-04-17 23:05:08,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:08,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163940234] [2020-04-17 23:05:08,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116815140] [2020-04-17 23:05:08,326 INFO L92 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 [2020-04-17 23:05:08,377 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:08,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:08,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:08,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:08,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:08,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:08,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:08,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280019475] [2020-04-17 23:05:08,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:08,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:08,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:08,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:08,403 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-04-17 23:05:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:09,010 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-04-17 23:05:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:05:09,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:09,011 INFO L225 Difference]: With dead ends: 136 [2020-04-17 23:05:09,011 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 23:05:09,011 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:05:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 23:05:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-04-17 23:05:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:05:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-04-17 23:05:09,014 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-04-17 23:05:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:09,014 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-04-17 23:05:09,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-04-17 23:05:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:09,014 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:09,014 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:09,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:09,215 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-04-17 23:05:09,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:09,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940929559] [2020-04-17 23:05:09,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:09,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940929559] [2020-04-17 23:05:09,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835221700] [2020-04-17 23:05:09,437 INFO L92 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 [2020-04-17 23:05:09,496 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:09,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:09,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:09,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:09,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:09,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:09,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473294321] [2020-04-17 23:05:09,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:09,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:09,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:09,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:09,508 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-04-17 23:05:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:10,125 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-04-17 23:05:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:05:10,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:10,126 INFO L225 Difference]: With dead ends: 137 [2020-04-17 23:05:10,126 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 23:05:10,126 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:05:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 23:05:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-04-17 23:05:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 23:05:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-04-17 23:05:10,129 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-04-17 23:05:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:10,129 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-04-17 23:05:10,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-04-17 23:05:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:10,129 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:10,130 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:10,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:10,330 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-04-17 23:05:10,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:10,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073819848] [2020-04-17 23:05:10,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:10,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073819848] [2020-04-17 23:05:10,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071591429] [2020-04-17 23:05:10,564 INFO L92 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 [2020-04-17 23:05:10,645 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:10,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:10,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:10,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:10,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:10,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:10,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:10,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604136178] [2020-04-17 23:05:10,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:10,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:10,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:10,696 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-04-17 23:05:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:11,405 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-04-17 23:05:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:05:11,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:11,406 INFO L225 Difference]: With dead ends: 134 [2020-04-17 23:05:11,407 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 23:05:11,407 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:05:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 23:05:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-04-17 23:05:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 23:05:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-04-17 23:05:11,410 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-04-17 23:05:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:11,410 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-04-17 23:05:11,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-04-17 23:05:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:11,411 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:11,411 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:11,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:11,612 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-04-17 23:05:11,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:11,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820118000] [2020-04-17 23:05:11,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:11,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820118000] [2020-04-17 23:05:11,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572923831] [2020-04-17 23:05:11,835 INFO L92 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 [2020-04-17 23:05:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:11,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:11,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:11,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:11,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:11,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382865182] [2020-04-17 23:05:11,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:11,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:11,901 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-04-17 23:05:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:12,553 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-04-17 23:05:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:05:12,553 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:12,554 INFO L225 Difference]: With dead ends: 135 [2020-04-17 23:05:12,554 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 23:05:12,554 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 23:05:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 23:05:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-04-17 23:05:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:05:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-04-17 23:05:12,557 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-04-17 23:05:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:12,557 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-04-17 23:05:12,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-04-17 23:05:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:12,557 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:12,557 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:12,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:12,758 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-04-17 23:05:12,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:12,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614929730] [2020-04-17 23:05:12,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:12,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614929730] [2020-04-17 23:05:12,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886672756] [2020-04-17 23:05:12,961 INFO L92 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 [2020-04-17 23:05:13,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:13,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:13,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:13,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:13,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:13,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:13,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:13,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031899756] [2020-04-17 23:05:13,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:13,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:13,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:13,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:13,041 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-04-17 23:05:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:13,810 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-04-17 23:05:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:05:13,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:13,811 INFO L225 Difference]: With dead ends: 132 [2020-04-17 23:05:13,811 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 23:05:13,812 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 23:05:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 23:05:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-04-17 23:05:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:05:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-04-17 23:05:13,814 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-04-17 23:05:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:13,814 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-04-17 23:05:13,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-04-17 23:05:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:13,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:13,815 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:14,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:14,016 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-04-17 23:05:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:14,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971569427] [2020-04-17 23:05:14,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:14,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971569427] [2020-04-17 23:05:14,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056473609] [2020-04-17 23:05:14,218 INFO L92 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 [2020-04-17 23:05:14,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:14,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:14,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:14,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:14,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:14,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:14,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398685771] [2020-04-17 23:05:14,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:14,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:14,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:14,291 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-04-17 23:05:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:14,976 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-04-17 23:05:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:05:14,976 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:14,977 INFO L225 Difference]: With dead ends: 133 [2020-04-17 23:05:14,977 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 23:05:14,977 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:05:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 23:05:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-04-17 23:05:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 23:05:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-04-17 23:05:14,980 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-04-17 23:05:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:14,980 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-04-17 23:05:14,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-04-17 23:05:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:14,980 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:14,980 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:15,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:15,181 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-04-17 23:05:15,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:15,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184311103] [2020-04-17 23:05:15,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:15,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184311103] [2020-04-17 23:05:15,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689068447] [2020-04-17 23:05:15,384 INFO L92 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 [2020-04-17 23:05:15,437 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:15,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:15,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:15,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:15,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:15,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:15,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:15,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949747279] [2020-04-17 23:05:15,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:15,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:15,467 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-04-17 23:05:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:16,306 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-04-17 23:05:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:05:16,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:16,307 INFO L225 Difference]: With dead ends: 130 [2020-04-17 23:05:16,307 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 23:05:16,308 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:05:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 23:05:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-04-17 23:05:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:05:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-04-17 23:05:16,310 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-04-17 23:05:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:16,310 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-04-17 23:05:16,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-04-17 23:05:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:16,311 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:16,311 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:16,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:16,512 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-04-17 23:05:16,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:16,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576089326] [2020-04-17 23:05:16,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:16,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576089326] [2020-04-17 23:05:16,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500555970] [2020-04-17 23:05:16,709 INFO L92 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 [2020-04-17 23:05:16,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:16,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:16,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:16,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:16,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:16,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:16,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502099248] [2020-04-17 23:05:16,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:16,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:16,778 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-04-17 23:05:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:17,505 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-04-17 23:05:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:05:17,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:17,507 INFO L225 Difference]: With dead ends: 131 [2020-04-17 23:05:17,507 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 23:05:17,507 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 23:05:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 23:05:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-04-17 23:05:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 23:05:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-04-17 23:05:17,510 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-04-17 23:05:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:17,511 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-04-17 23:05:17,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-04-17 23:05:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:17,511 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:17,511 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:17,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:17,715 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-04-17 23:05:17,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:17,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408028083] [2020-04-17 23:05:17,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:17,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408028083] [2020-04-17 23:05:17,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179163724] [2020-04-17 23:05:17,913 INFO L92 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 [2020-04-17 23:05:17,971 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:17,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:17,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:17,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:17,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:17,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:17,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:17,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930811652] [2020-04-17 23:05:17,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:17,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:17,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:18,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:18,000 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-04-17 23:05:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:18,899 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-04-17 23:05:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:05:18,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:18,900 INFO L225 Difference]: With dead ends: 128 [2020-04-17 23:05:18,900 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 23:05:18,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:05:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 23:05:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-04-17 23:05:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 23:05:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-04-17 23:05:18,903 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-04-17 23:05:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:18,903 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-04-17 23:05:18,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-04-17 23:05:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:18,903 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:18,904 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:19,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:19,104 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-04-17 23:05:19,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:19,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604390404] [2020-04-17 23:05:19,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:19,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604390404] [2020-04-17 23:05:19,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281523803] [2020-04-17 23:05:19,286 INFO L92 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 [2020-04-17 23:05:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:19,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:19,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:19,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:19,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:19,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741117102] [2020-04-17 23:05:19,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:19,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:19,357 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-04-17 23:05:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:20,123 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-04-17 23:05:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:20,123 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:20,124 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:05:20,124 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:05:20,124 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 23:05:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:05:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-04-17 23:05:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:05:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:05:20,126 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-04-17 23:05:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:20,127 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:05:20,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:05:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:20,127 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:20,127 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:20,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:20,328 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:20,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-04-17 23:05:20,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:20,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9012137] [2020-04-17 23:05:20,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:20,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9012137] [2020-04-17 23:05:20,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230749904] [2020-04-17 23:05:20,510 INFO L92 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 [2020-04-17 23:05:20,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:20,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:20,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:20,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:20,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:20,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:20,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:20,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282766667] [2020-04-17 23:05:20,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:20,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:20,596 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-04-17 23:05:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:21,557 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-04-17 23:05:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:05:21,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:21,564 INFO L225 Difference]: With dead ends: 126 [2020-04-17 23:05:21,564 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 23:05:21,564 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 23:05:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 23:05:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-04-17 23:05:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:05:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:05:21,565 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-04-17 23:05:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:21,566 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:05:21,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:05:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:21,566 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:21,566 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:21,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:21,767 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-04-17 23:05:21,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:21,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350064343] [2020-04-17 23:05:21,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:21,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350064343] [2020-04-17 23:05:21,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586228617] [2020-04-17 23:05:21,947 INFO L92 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 [2020-04-17 23:05:22,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:22,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:22,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:22,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:22,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:22,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:22,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660095815] [2020-04-17 23:05:22,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:22,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:22,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:22,019 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-04-17 23:05:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:22,844 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-04-17 23:05:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 23:05:22,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:22,845 INFO L225 Difference]: With dead ends: 127 [2020-04-17 23:05:22,845 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 23:05:22,846 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 23:05:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 23:05:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-04-17 23:05:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 23:05:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-04-17 23:05:22,848 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-04-17 23:05:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:22,848 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-04-17 23:05:22,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-04-17 23:05:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:22,849 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:22,849 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:23,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:23,050 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:23,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-04-17 23:05:23,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:23,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336299487] [2020-04-17 23:05:23,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:23,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336299487] [2020-04-17 23:05:23,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160844721] [2020-04-17 23:05:23,228 INFO L92 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 [2020-04-17 23:05:23,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:23,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:23,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:23,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:23,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:23,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:23,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:23,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340844361] [2020-04-17 23:05:23,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:23,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:23,316 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-04-17 23:05:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:24,354 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-04-17 23:05:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 23:05:24,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:24,355 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:05:24,355 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:05:24,355 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 23:05:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:05:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-04-17 23:05:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 23:05:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 23:05:24,358 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-04-17 23:05:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:24,358 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 23:05:24,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 23:05:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:24,358 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:24,358 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:24,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:24,559 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-04-17 23:05:24,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:24,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402287706] [2020-04-17 23:05:24,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:24,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402287706] [2020-04-17 23:05:24,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031995677] [2020-04-17 23:05:24,735 INFO L92 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 [2020-04-17 23:05:24,792 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:24,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:24,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:24,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:24,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:24,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:24,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694359132] [2020-04-17 23:05:24,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:24,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:24,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:24,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:24,809 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-04-17 23:05:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:25,652 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-04-17 23:05:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 23:05:25,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:25,654 INFO L225 Difference]: With dead ends: 144 [2020-04-17 23:05:25,654 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 23:05:25,654 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 23:05:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 23:05:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-04-17 23:05:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 23:05:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-04-17 23:05:25,656 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-04-17 23:05:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:25,656 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-04-17 23:05:25,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-04-17 23:05:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:25,657 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:25,657 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:25,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:25,858 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-04-17 23:05:25,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:25,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862418680] [2020-04-17 23:05:25,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:26,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862418680] [2020-04-17 23:05:26,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122695296] [2020-04-17 23:05:26,045 INFO L92 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 [2020-04-17 23:05:26,101 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:26,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:26,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:26,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:26,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:26,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:26,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:26,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417157674] [2020-04-17 23:05:26,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:26,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:26,134 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-04-17 23:05:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:27,207 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-04-17 23:05:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 23:05:27,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:27,208 INFO L225 Difference]: With dead ends: 125 [2020-04-17 23:05:27,208 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:05:27,209 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 23:05:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:05:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-04-17 23:05:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 23:05:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-04-17 23:05:27,211 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-04-17 23:05:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:27,211 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-04-17 23:05:27,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-04-17 23:05:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:27,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:27,212 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:27,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:27,413 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-04-17 23:05:27,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:27,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707404469] [2020-04-17 23:05:27,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:27,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707404469] [2020-04-17 23:05:27,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524878946] [2020-04-17 23:05:27,690 INFO L92 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 [2020-04-17 23:05:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:27,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:27,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:27,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:27,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:27,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864312586] [2020-04-17 23:05:27,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:27,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:27,751 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-04-17 23:05:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:28,236 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-04-17 23:05:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:05:28,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:28,237 INFO L225 Difference]: With dead ends: 144 [2020-04-17 23:05:28,237 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 23:05:28,238 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:05:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 23:05:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-04-17 23:05:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:28,240 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:28,240 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:28,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:28,241 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:28,241 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:28,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:28,442 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-04-17 23:05:28,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:28,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239459136] [2020-04-17 23:05:28,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:28,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239459136] [2020-04-17 23:05:28,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455318099] [2020-04-17 23:05:28,705 INFO L92 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 [2020-04-17 23:05:28,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:28,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:28,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:28,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:28,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:28,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:28,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:28,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783210503] [2020-04-17 23:05:28,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:28,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:28,788 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:29,365 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-04-17 23:05:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:05:29,365 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:29,366 INFO L225 Difference]: With dead ends: 141 [2020-04-17 23:05:29,366 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 23:05:29,366 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:05:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 23:05:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-04-17 23:05:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:29,369 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:29,369 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:29,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:29,370 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:29,370 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:29,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:29,573 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:29,574 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-04-17 23:05:29,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:29,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520927883] [2020-04-17 23:05:29,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:29,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520927883] [2020-04-17 23:05:29,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989452823] [2020-04-17 23:05:29,831 INFO L92 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 [2020-04-17 23:05:29,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:29,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:29,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:29,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:29,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:29,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:29,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002341787] [2020-04-17 23:05:29,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:29,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:29,897 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:30,433 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-04-17 23:05:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:05:30,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:30,434 INFO L225 Difference]: With dead ends: 138 [2020-04-17 23:05:30,434 INFO L226 Difference]: Without dead ends: 132 [2020-04-17 23:05:30,434 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:05:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-04-17 23:05:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-04-17 23:05:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:30,437 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:30,437 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:30,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:30,437 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:30,438 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:30,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:30,638 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-04-17 23:05:30,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:30,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253903013] [2020-04-17 23:05:30,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:30,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253903013] [2020-04-17 23:05:30,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547449896] [2020-04-17 23:05:30,885 INFO L92 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 [2020-04-17 23:05:30,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:30,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:30,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:30,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:30,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:30,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:30,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:30,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122647659] [2020-04-17 23:05:30,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:30,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:30,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:30,971 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:31,626 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-04-17 23:05:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:05:31,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:31,627 INFO L225 Difference]: With dead ends: 137 [2020-04-17 23:05:31,628 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 23:05:31,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:05:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 23:05:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-04-17 23:05:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:31,630 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:31,631 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:31,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:31,631 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:31,631 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:31,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:31,832 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-04-17 23:05:31,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:31,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790151510] [2020-04-17 23:05:31,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:32,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790151510] [2020-04-17 23:05:32,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808312732] [2020-04-17 23:05:32,062 INFO L92 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 [2020-04-17 23:05:32,114 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:32,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:32,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:32,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:32,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:32,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:32,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728366796] [2020-04-17 23:05:32,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:32,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:32,126 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:32,705 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-04-17 23:05:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:05:32,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:32,706 INFO L225 Difference]: With dead ends: 134 [2020-04-17 23:05:32,706 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 23:05:32,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:05:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 23:05:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-04-17 23:05:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:32,709 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:32,710 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:32,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:32,711 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:32,711 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:32,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:32,915 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-04-17 23:05:32,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:32,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579395021] [2020-04-17 23:05:32,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:33,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579395021] [2020-04-17 23:05:33,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484935077] [2020-04-17 23:05:33,151 INFO L92 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 [2020-04-17 23:05:33,209 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:33,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:33,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:33,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:33,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:33,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:33,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:33,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840584367] [2020-04-17 23:05:33,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:33,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:33,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:33,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:33,247 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:33,925 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-04-17 23:05:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:05:33,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:33,926 INFO L225 Difference]: With dead ends: 133 [2020-04-17 23:05:33,926 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 23:05:33,927 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 23:05:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 23:05:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-04-17 23:05:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:33,929 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:33,930 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:33,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:33,930 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:33,930 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:34,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:34,131 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-04-17 23:05:34,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:34,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426793755] [2020-04-17 23:05:34,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:34,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426793755] [2020-04-17 23:05:34,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805194568] [2020-04-17 23:05:34,349 INFO L92 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 [2020-04-17 23:05:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:34,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:34,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:34,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:34,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:34,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806624469] [2020-04-17 23:05:34,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:34,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:34,417 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:35,027 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-04-17 23:05:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:05:35,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:35,028 INFO L225 Difference]: With dead ends: 130 [2020-04-17 23:05:35,028 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 23:05:35,029 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:05:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 23:05:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-04-17 23:05:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:35,031 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:35,031 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:35,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:35,032 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:35,032 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:35,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:35,233 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:35,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-04-17 23:05:35,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:35,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678333775] [2020-04-17 23:05:35,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:35,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678333775] [2020-04-17 23:05:35,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584867815] [2020-04-17 23:05:35,490 INFO L92 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 [2020-04-17 23:05:35,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:35,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:35,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:35,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:35,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:35,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:35,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:35,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014316099] [2020-04-17 23:05:35,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:35,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:35,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:35,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:35,568 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:36,351 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-04-17 23:05:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:05:36,351 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:36,352 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:05:36,352 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:05:36,352 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:05:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:05:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-04-17 23:05:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:36,355 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:36,355 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:36,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:36,356 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:36,356 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:36,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:36,558 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-04-17 23:05:36,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:36,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434783856] [2020-04-17 23:05:36,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:36,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434783856] [2020-04-17 23:05:36,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828737289] [2020-04-17 23:05:36,775 INFO L92 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 [2020-04-17 23:05:36,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:36,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:36,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:36,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:36,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:36,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:36,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384114195] [2020-04-17 23:05:36,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:36,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:36,848 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:37,541 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-04-17 23:05:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:05:37,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:37,542 INFO L225 Difference]: With dead ends: 126 [2020-04-17 23:05:37,542 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 23:05:37,543 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 23:05:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 23:05:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-04-17 23:05:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:37,545 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:37,546 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:37,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:37,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:37,546 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:37,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:37,747 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-04-17 23:05:37,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:37,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609549746] [2020-04-17 23:05:37,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:37,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609549746] [2020-04-17 23:05:37,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826350942] [2020-04-17 23:05:37,969 INFO L92 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 [2020-04-17 23:05:38,021 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:38,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:38,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:38,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:38,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:38,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:38,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:38,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716565492] [2020-04-17 23:05:38,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:38,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:38,055 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:38,918 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-04-17 23:05:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:05:38,919 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:38,919 INFO L225 Difference]: With dead ends: 125 [2020-04-17 23:05:38,919 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 23:05:38,920 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 23:05:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 23:05:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-04-17 23:05:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:38,922 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:38,923 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:38,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:38,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:38,923 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:39,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:39,127 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:39,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-04-17 23:05:39,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:39,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078285281] [2020-04-17 23:05:39,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:39,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078285281] [2020-04-17 23:05:39,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160656987] [2020-04-17 23:05:39,343 INFO L92 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 [2020-04-17 23:05:39,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:39,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:39,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:39,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:39,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:39,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:39,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459257702] [2020-04-17 23:05:39,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:39,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:39,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:39,415 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:40,142 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-04-17 23:05:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:05:40,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:40,143 INFO L225 Difference]: With dead ends: 122 [2020-04-17 23:05:40,143 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 23:05:40,144 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:05:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 23:05:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-04-17 23:05:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:40,147 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:40,147 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:40,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:40,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:40,148 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:40,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:40,351 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:40,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:40,352 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-04-17 23:05:40,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:40,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874885981] [2020-04-17 23:05:40,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:40,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874885981] [2020-04-17 23:05:40,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850273471] [2020-04-17 23:05:40,555 INFO L92 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 [2020-04-17 23:05:40,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:40,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:40,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:40,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:40,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:40,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:40,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:40,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510528796] [2020-04-17 23:05:40,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:40,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:40,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:40,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:40,651 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:41,591 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-04-17 23:05:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:05:41,591 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:41,592 INFO L225 Difference]: With dead ends: 121 [2020-04-17 23:05:41,592 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 23:05:41,592 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 23:05:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 23:05:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-04-17 23:05:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:41,595 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:41,595 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:41,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:41,596 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:41,596 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:41,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:41,800 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-04-17 23:05:41,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:41,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247629623] [2020-04-17 23:05:41,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:41,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247629623] [2020-04-17 23:05:41,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103941477] [2020-04-17 23:05:41,995 INFO L92 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 [2020-04-17 23:05:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:42,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:42,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:42,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:42,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:42,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057381768] [2020-04-17 23:05:42,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:42,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:42,082 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:42,854 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-04-17 23:05:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:05:42,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:42,855 INFO L225 Difference]: With dead ends: 118 [2020-04-17 23:05:42,856 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 23:05:42,856 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:05:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 23:05:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-04-17 23:05:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:42,858 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:42,859 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:42,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:42,859 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:42,860 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:43,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:43,060 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:43,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-04-17 23:05:43,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:43,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517286868] [2020-04-17 23:05:43,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:43,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517286868] [2020-04-17 23:05:43,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760960959] [2020-04-17 23:05:43,291 INFO L92 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 [2020-04-17 23:05:43,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:43,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:43,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:43,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:43,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:43,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:43,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:43,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531216352] [2020-04-17 23:05:43,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:43,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:43,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:43,373 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:44,374 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-04-17 23:05:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:05:44,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:44,375 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:05:44,375 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:05:44,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 23:05:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:05:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-04-17 23:05:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:44,378 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:44,378 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:44,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:44,378 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:44,378 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:44,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:44,579 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-04-17 23:05:44,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:44,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830976409] [2020-04-17 23:05:44,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:44,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830976409] [2020-04-17 23:05:44,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223243756] [2020-04-17 23:05:44,779 INFO L92 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 [2020-04-17 23:05:44,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:44,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:44,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-17 23:05:44,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:44,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:44,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:44,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225903459] [2020-04-17 23:05:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:44,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:44,856 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:45,677 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-04-17 23:05:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:45,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:45,678 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:05:45,678 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:05:45,678 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 23:05:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:05:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-04-17 23:05:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:45,681 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:45,681 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:45,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:45,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:45,681 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:45,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:45,882 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-04-17 23:05:45,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:45,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742483022] [2020-04-17 23:05:45,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:46,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742483022] [2020-04-17 23:05:46,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345633682] [2020-04-17 23:05:46,073 INFO L92 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 [2020-04-17 23:05:46,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:46,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:46,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:46,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:46,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:46,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:46,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:46,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414614665] [2020-04-17 23:05:46,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:46,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:46,161 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:47,238 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 23:05:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 23:05:47,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:47,239 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:05:47,239 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:05:47,240 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 23:05:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:05:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-04-17 23:05:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:47,242 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:47,243 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:47,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:47,243 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:47,243 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:47,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:47,444 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-04-17 23:05:47,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:47,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307792595] [2020-04-17 23:05:47,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:47,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307792595] [2020-04-17 23:05:47,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91135874] [2020-04-17 23:05:47,638 INFO L92 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 [2020-04-17 23:05:47,696 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:47,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:47,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:47,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:47,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:47,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:47,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651671424] [2020-04-17 23:05:47,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:47,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:47,720 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:48,589 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-04-17 23:05:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 23:05:48,590 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:48,590 INFO L225 Difference]: With dead ends: 110 [2020-04-17 23:05:48,591 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 23:05:48,591 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 23:05:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 23:05:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-04-17 23:05:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 23:05:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 23:05:48,593 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 23:05:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:48,593 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 23:05:48,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 23:05:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:48,593 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:48,594 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:48,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:48,794 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-04-17 23:05:48,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:48,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174798464] [2020-04-17 23:05:48,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:48,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174798464] [2020-04-17 23:05:48,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952861322] [2020-04-17 23:05:48,978 INFO L92 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 [2020-04-17 23:05:49,035 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:49,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:49,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:49,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:49,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:49,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:49,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:49,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852431459] [2020-04-17 23:05:49,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:49,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:49,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:49,073 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 23:05:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:50,238 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-04-17 23:05:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 23:05:50,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:50,239 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:05:50,240 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:05:50,240 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 23:05:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:05:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-04-17 23:05:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 23:05:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 23:05:50,242 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 23:05:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:50,243 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 23:05:50,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 23:05:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:50,243 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:50,243 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:50,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:50,444 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-04-17 23:05:50,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:50,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245602271] [2020-04-17 23:05:50,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:50,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245602271] [2020-04-17 23:05:50,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656601835] [2020-04-17 23:05:50,638 INFO L92 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 [2020-04-17 23:05:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:50,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:50,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:50,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:50,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 23:05:50,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197344878] [2020-04-17 23:05:50,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:50,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:50,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:50,709 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 23:05:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:51,641 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-04-17 23:05:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 23:05:51,641 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 23:05:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:51,642 INFO L225 Difference]: With dead ends: 125 [2020-04-17 23:05:51,642 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 23:05:51,642 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 23:05:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 23:05:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-04-17 23:05:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 23:05:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-04-17 23:05:51,645 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-04-17 23:05:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:51,645 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-04-17 23:05:51,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-04-17 23:05:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:51,645 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:51,645 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:51,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:51,846 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-04-17 23:05:51,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:51,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153748818] [2020-04-17 23:05:51,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:52,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153748818] [2020-04-17 23:05:52,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019471504] [2020-04-17 23:05:52,041 INFO L92 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 [2020-04-17 23:05:52,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:52,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:52,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:52,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:52,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:52,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:52,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:52,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60951641] [2020-04-17 23:05:52,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:52,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:52,128 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-04-17 23:05:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:53,324 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-04-17 23:05:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-17 23:05:53,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:53,325 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:05:53,326 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:05:53,326 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 23:05:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:05:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-04-17 23:05:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:05:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-04-17 23:05:53,328 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-04-17 23:05:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:53,329 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-04-17 23:05:53,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-04-17 23:05:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:53,329 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:53,329 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:53,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:53,530 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-04-17 23:05:53,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:53,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544954441] [2020-04-17 23:05:53,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:53,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544954441] [2020-04-17 23:05:53,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408352993] [2020-04-17 23:05:53,742 INFO L92 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 [2020-04-17 23:05:53,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:53,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:53,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 23:05:53,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:53,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:53,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:53,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 23:05:53,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027230779] [2020-04-17 23:05:53,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:05:53,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:05:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:05:53,833 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-04-17 23:05:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:54,917 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-04-17 23:05:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 23:05:54,917 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 23:05:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:54,918 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:05:54,918 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 23:05:54,918 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 23:05:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 23:05:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-04-17 23:05:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 23:05:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-04-17 23:05:54,920 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-04-17 23:05:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:54,921 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-04-17 23:05:54,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:05:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-04-17 23:05:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 23:05:54,921 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:54,921 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:55,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:55,122 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-04-17 23:05:55,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:55,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914172910] [2020-04-17 23:05:55,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:55,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914172910] [2020-04-17 23:05:55,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451217337] [2020-04-17 23:05:55,244 INFO L92 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 [2020-04-17 23:05:55,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:55,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:55,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:05:55,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:55,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:05:55,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-04-17 23:05:55,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776542046] [2020-04-17 23:05:55,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:05:55,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:05:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:05:55,312 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-04-17 23:05:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:55,337 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-04-17 23:05:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:05:55,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-04-17 23:05:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:55,338 INFO L225 Difference]: With dead ends: 421 [2020-04-17 23:05:55,339 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 23:05:55,339 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:05:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 23:05:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-04-17 23:05:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:05:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-04-17 23:05:55,340 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-04-17 23:05:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:55,341 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-04-17 23:05:55,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:05:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-04-17 23:05:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 23:05:55,341 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:55,341 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:55,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:55,542 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-04-17 23:05:55,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:55,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143692570] [2020-04-17 23:05:55,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:55,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143692570] [2020-04-17 23:05:55,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793740615] [2020-04-17 23:05:55,893 INFO L92 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 [2020-04-17 23:05:55,953 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 23:05:55,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:55,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:05:55,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:05:56,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:05:56,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [24] total 37 [2020-04-17 23:05:56,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278692495] [2020-04-17 23:05:56,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:05:56,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:05:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:05:56,149 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-04-17 23:05:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:56,190 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-04-17 23:05:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:05:56,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-04-17 23:05:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:56,191 INFO L225 Difference]: With dead ends: 256 [2020-04-17 23:05:56,191 INFO L226 Difference]: Without dead ends: 0 [2020-04-17 23:05:56,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:05:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-17 23:05:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-17 23:05:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-17 23:05:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-17 23:05:56,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-04-17 23:05:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:56,192 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-17 23:05:56,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:05:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-17 23:05:56,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-17 23:05:56,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:56,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:05:56 BasicIcfg [2020-04-17 23:05:56,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:05:56,399 INFO L168 Benchmark]: Toolchain (without parser) took 228159.50 ms. Allocated memory was 136.8 MB in the beginning and 235.9 MB in the end (delta: 99.1 MB). Free memory was 99.9 MB in the beginning and 167.7 MB in the end (delta: -67.8 MB). Peak memory consumption was 31.3 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,400 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.89 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 98.0 MB in the beginning and 158.2 MB in the end (delta: -60.2 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.65 ms. Allocated memory is still 201.3 MB. Free memory was 158.2 MB in the beginning and 156.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,401 INFO L168 Benchmark]: Boogie Preprocessor took 27.57 ms. Allocated memory is still 201.3 MB. Free memory was 156.8 MB in the beginning and 154.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,401 INFO L168 Benchmark]: RCFGBuilder took 430.50 ms. Allocated memory is still 201.3 MB. Free memory was 154.7 MB in the beginning and 134.7 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,402 INFO L168 Benchmark]: TraceAbstraction took 226891.88 ms. Allocated memory was 201.3 MB in the beginning and 235.9 MB in the end (delta: 34.6 MB). Free memory was 134.0 MB in the beginning and 167.7 MB in the end (delta: -33.7 MB). Peak memory consumption was 874.3 kB. Max. memory is 7.1 GB. [2020-04-17 23:05:56,405 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 734.89 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 98.0 MB in the beginning and 158.2 MB in the end (delta: -60.2 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 54.65 ms. Allocated memory is still 201.3 MB. Free memory was 158.2 MB in the beginning and 156.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.57 ms. Allocated memory is still 201.3 MB. Free memory was 156.8 MB in the beginning and 154.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.50 ms. Allocated memory is still 201.3 MB. Free memory was 154.7 MB in the beginning and 134.7 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226891.88 ms. Allocated memory was 201.3 MB in the beginning and 235.9 MB in the end (delta: 34.6 MB). Free memory was 134.0 MB in the beginning and 167.7 MB in the end (delta: -33.7 MB). Peak memory consumption was 874.3 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 226.7s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 121.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3909 SDtfs, 13860 SDslu, 25494 SDs, 0 SdLazy, 27652 SolverSat, 16141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13655 GetRequests, 4495 SyntacticMatches, 234 SemanticMatches, 8926 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91332 ImplicationChecksByTransitivity, 120.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 241 MinimizatonAttempts, 6066 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 39.6s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 958311 SizeOfPredicates, 3173 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4163 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 290/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...