/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 13:05:27,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 13:05:27,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 13:05:27,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 13:05:27,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 13:05:27,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 13:05:27,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 13:05:27,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 13:05:27,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 13:05:27,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 13:05:27,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 13:05:27,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 13:05:27,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 13:05:27,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 13:05:27,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 13:05:27,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 13:05:27,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 13:05:27,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 13:05:27,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 13:05:27,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 13:05:27,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 13:05:27,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 13:05:28,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 13:05:28,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 13:05:28,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 13:05:28,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 13:05:28,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 13:05:28,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 13:05:28,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 13:05:28,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 13:05:28,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 13:05:28,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 13:05:28,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 13:05:28,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 13:05:28,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 13:05:28,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 13:05:28,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 13:05:28,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 13:05:28,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 13:05:28,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 13:05:28,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 13:05:28,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 13:05:28,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 13:05:28,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 13:05:28,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 13:05:28,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 13:05:28,098 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 13:05:28,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 13:05:28,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 13:05:28,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 13:05:28,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 13:05:28,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 13:05:28,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 13:05:28,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 13:05:28,100 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 13:05:28,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 13:05:28,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 13:05:28,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 13:05:28,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 13:05:28,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:05:28,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 13:05:28,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 13:05:28,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 13:05:28,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 13:05:28,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 13:05:28,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 13:05:28,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 13:05:28,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 13:05:28,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 13:05:28,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 13:05:28,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 13:05:28,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 13:05:28,495 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 13:05:28,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2020-12-23 13:05:28,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d143e8e1c/8b8aaf94ef71417f87abb2897f279965/FLAG3bb260f26 [2020-12-23 13:05:29,213 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 13:05:29,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2020-12-23 13:05:29,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d143e8e1c/8b8aaf94ef71417f87abb2897f279965/FLAG3bb260f26 [2020-12-23 13:05:29,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d143e8e1c/8b8aaf94ef71417f87abb2897f279965 [2020-12-23 13:05:29,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 13:05:29,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 13:05:29,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 13:05:29,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 13:05:29,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 13:05:29,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:05:29" (1/1) ... [2020-12-23 13:05:29,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a74788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:29, skipping insertion in model container [2020-12-23 13:05:29,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:05:29" (1/1) ... [2020-12-23 13:05:29,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 13:05:29,594 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2020-12-23 13:05:30,040 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2020-12-23 13:05:30,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:05:30,055 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2020-12-23 13:05:30,117 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2020-12-23 13:05:30,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:05:30,223 INFO L208 MainTranslator]: Completed translation [2020-12-23 13:05:30,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30 WrapperNode [2020-12-23 13:05:30,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 13:05:30,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 13:05:30,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 13:05:30,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 13:05:30,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 13:05:30,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 13:05:30,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 13:05:30,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 13:05:30,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 13:05:30,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 13:05:30,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 13:05:30,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 13:05:30,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:30,443 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-23 13:05:30,443 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-23 13:05:30,443 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-23 13:05:30,443 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-23 13:05:30,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 13:05:30,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-23 13:05:30,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 13:05:30,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 13:05:30,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 13:05:30,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-23 13:05:30,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 13:05:30,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 13:05:30,446 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-23 13:05:30,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 13:05:30,912 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 13:05:30,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:05:30 BoogieIcfgContainer [2020-12-23 13:05:30,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 13:05:30,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 13:05:30,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 13:05:30,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 13:05:30,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:05:29" (1/3) ... [2020-12-23 13:05:30,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df3b6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:05:30, skipping insertion in model container [2020-12-23 13:05:30,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (2/3) ... [2020-12-23 13:05:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df3b6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:05:30, skipping insertion in model container [2020-12-23 13:05:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:05:30" (3/3) ... [2020-12-23 13:05:30,924 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-12-23 13:05:30,931 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-23 13:05:30,931 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 13:05:30,937 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 13:05:30,938 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-23 13:05:30,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,985 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,985 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,992 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,992 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,992 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,993 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:30,996 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-23 13:05:31,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 13:05:31,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 13:05:31,041 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 13:05:31,041 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 13:05:31,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 13:05:31,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 13:05:31,042 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 13:05:31,042 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 13:05:31,042 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 13:05:31,056 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-23 13:05:31,059 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-23 13:05:31,063 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-23 13:05:31,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-23 13:05:31,106 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-23 13:05:31,107 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-23 13:05:31,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-23 13:05:31,114 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-23 13:05:33,539 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-23 13:05:34,265 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-23 13:05:34,428 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-23 13:05:34,740 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-23 13:05:34,888 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-23 13:05:34,911 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-23 13:05:34,912 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-23 13:05:34,918 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-23 13:05:34,929 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-23 13:05:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-23 13:05:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 13:05:34,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:34,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 13:05:34,940 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-23 13:05:34,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:34,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609620553] [2020-12-23 13:05:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609620553] [2020-12-23 13:05:35,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 13:05:35,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387055200] [2020-12-23 13:05:35,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 13:05:35,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 13:05:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 13:05:35,358 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-23 13:05:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:35,422 INFO L93 Difference]: Finished difference Result 59 states and 152 transitions. [2020-12-23 13:05:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 13:05:35,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 13:05:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:35,438 INFO L225 Difference]: With dead ends: 59 [2020-12-23 13:05:35,439 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 13:05:35,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 13:05:35,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 13:05:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 13:05:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-12-23 13:05:35,489 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2020-12-23 13:05:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:35,489 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-12-23 13:05:35,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 13:05:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-12-23 13:05:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:05:35,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 13:05:35,492 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-23 13:05:35,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002695123] [2020-12-23 13:05:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002695123] [2020-12-23 13:05:35,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:05:35,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518074632] [2020-12-23 13:05:35,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:05:35,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:05:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,593 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 5 states. [2020-12-23 13:05:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:35,640 INFO L93 Difference]: Finished difference Result 82 states and 192 transitions. [2020-12-23 13:05:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 13:05:35,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:05:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:35,642 INFO L225 Difference]: With dead ends: 82 [2020-12-23 13:05:35,642 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 13:05:35,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 13:05:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-12-23 13:05:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 13:05:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-12-23 13:05:35,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 8 [2020-12-23 13:05:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:35,657 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-12-23 13:05:35,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:05:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-12-23 13:05:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:05:35,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 13:05:35,659 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-23 13:05:35,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774877279] [2020-12-23 13:05:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774877279] [2020-12-23 13:05:35,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:05:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767488713] [2020-12-23 13:05:35,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:05:35,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:05:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,774 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 5 states. [2020-12-23 13:05:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:35,868 INFO L93 Difference]: Finished difference Result 70 states and 163 transitions. [2020-12-23 13:05:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:05:35,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:05:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:35,870 INFO L225 Difference]: With dead ends: 70 [2020-12-23 13:05:35,870 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 13:05:35,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 13:05:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-12-23 13:05:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 13:05:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2020-12-23 13:05:35,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 8 [2020-12-23 13:05:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:35,877 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2020-12-23 13:05:35,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:05:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2020-12-23 13:05:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:35,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 13:05:35,879 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,880 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-23 13:05:35,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370362393] [2020-12-23 13:05:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370362393] [2020-12-23 13:05:36,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818150061] [2020-12-23 13:05:36,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,017 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand 6 states. [2020-12-23 13:05:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,091 INFO L93 Difference]: Finished difference Result 58 states and 134 transitions. [2020-12-23 13:05:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:05:36,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,101 INFO L225 Difference]: With dead ends: 58 [2020-12-23 13:05:36,101 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 13:05:36,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 13:05:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-12-23 13:05:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 13:05:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-12-23 13:05:36,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 10 [2020-12-23 13:05:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,126 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-12-23 13:05:36,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-12-23 13:05:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:36,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 13:05:36,127 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-23 13:05:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469573413] [2020-12-23 13:05:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469573413] [2020-12-23 13:05:36,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069133638] [2020-12-23 13:05:36,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,232 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 6 states. [2020-12-23 13:05:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,316 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-12-23 13:05:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:05:36,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,318 INFO L225 Difference]: With dead ends: 78 [2020-12-23 13:05:36,318 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 13:05:36,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 13:05:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-23 13:05:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:05:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2020-12-23 13:05:36,327 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 10 [2020-12-23 13:05:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,328 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2020-12-23 13:05:36,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2020-12-23 13:05:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:36,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 13:05:36,331 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-23 13:05:36,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143782310] [2020-12-23 13:05:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143782310] [2020-12-23 13:05:36,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513902606] [2020-12-23 13:05:36,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,411 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand 6 states. [2020-12-23 13:05:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,503 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-12-23 13:05:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:05:36,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,506 INFO L225 Difference]: With dead ends: 56 [2020-12-23 13:05:36,506 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 13:05:36,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 13:05:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-12-23 13:05:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 13:05:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-23 13:05:36,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-23 13:05:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,527 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-23 13:05:36,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-23 13:05:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:05:36,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,530 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 13:05:36,530 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 4 times [2020-12-23 13:05:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586177621] [2020-12-23 13:05:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586177621] [2020-12-23 13:05:36,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520691358] [2020-12-23 13:05:36,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:36,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:36,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:36,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 13:05:36,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224992087] [2020-12-23 13:05:36,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:36,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:36,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:36,812 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-12-23 13:05:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,909 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2020-12-23 13:05:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:05:36,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 13:05:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,911 INFO L225 Difference]: With dead ends: 55 [2020-12-23 13:05:36,911 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 13:05:36,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 13:05:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-23 13:05:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 13:05:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-23 13:05:36,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2020-12-23 13:05:36,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,921 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-23 13:05:36,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-23 13:05:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:05:36,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,925 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:37,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 13:05:37,143 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:37,144 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 5 times [2020-12-23 13:05:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:37,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367328468] [2020-12-23 13:05:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367328468] [2020-12-23 13:05:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168303956] [2020-12-23 13:05:37,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:37,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:37,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:37,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:05:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:37,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 13:05:37,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136801260] [2020-12-23 13:05:37,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:37,390 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 8 states. [2020-12-23 13:05:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:37,507 INFO L93 Difference]: Finished difference Result 57 states and 135 transitions. [2020-12-23 13:05:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:05:37,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 13:05:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:37,509 INFO L225 Difference]: With dead ends: 57 [2020-12-23 13:05:37,509 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 13:05:37,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 13:05:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-12-23 13:05:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 13:05:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-12-23 13:05:37,523 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-12-23 13:05:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:37,523 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-12-23 13:05:37,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-12-23 13:05:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:05:37,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:37,528 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:37,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:37,742 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash -319965345, now seen corresponding path program 6 times [2020-12-23 13:05:37,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:37,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538497525] [2020-12-23 13:05:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538497525] [2020-12-23 13:05:37,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26294096] [2020-12-23 13:05:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:37,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:05:37,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:37,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 13:05:37,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855180833] [2020-12-23 13:05:37,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:37,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:37,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:37,986 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-12-23 13:05:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:38,117 INFO L93 Difference]: Finished difference Result 80 states and 187 transitions. [2020-12-23 13:05:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:38,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 13:05:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:38,119 INFO L225 Difference]: With dead ends: 80 [2020-12-23 13:05:38,119 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 13:05:38,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 13:05:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 46. [2020-12-23 13:05:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:05:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-12-23 13:05:38,124 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-12-23 13:05:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:38,124 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-12-23 13:05:38,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-12-23 13:05:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:05:38,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:38,125 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:38,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:38,340 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash -319943025, now seen corresponding path program 7 times [2020-12-23 13:05:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:38,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638097532] [2020-12-23 13:05:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638097532] [2020-12-23 13:05:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89760274] [2020-12-23 13:05:38,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:38,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:38,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:38,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 13:05:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8896308] [2020-12-23 13:05:38,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:38,534 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-12-23 13:05:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:38,735 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-12-23 13:05:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:38,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 13:05:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:38,736 INFO L225 Difference]: With dead ends: 64 [2020-12-23 13:05:38,737 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 13:05:38,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:05:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 13:05:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2020-12-23 13:05:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 13:05:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-12-23 13:05:38,740 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-12-23 13:05:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:38,741 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-12-23 13:05:38,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-12-23 13:05:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:05:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:38,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:38,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:38,958 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1426667684, now seen corresponding path program 8 times [2020-12-23 13:05:38,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:38,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762750648] [2020-12-23 13:05:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:39,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762750648] [2020-12-23 13:05:39,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871973790] [2020-12-23 13:05:39,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:39,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:39,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:05:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:39,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:39,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 13:05:39,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109347260] [2020-12-23 13:05:39,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:39,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:39,189 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-12-23 13:05:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:39,360 INFO L93 Difference]: Finished difference Result 51 states and 117 transitions. [2020-12-23 13:05:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:05:39,361 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-23 13:05:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:39,362 INFO L225 Difference]: With dead ends: 51 [2020-12-23 13:05:39,362 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 13:05:39,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 13:05:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-23 13:05:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 13:05:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-12-23 13:05:39,366 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-12-23 13:05:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:39,367 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-12-23 13:05:39,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-12-23 13:05:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:05:39,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:39,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:39,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 13:05:39,583 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:39,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1239613902, now seen corresponding path program 9 times [2020-12-23 13:05:39,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:39,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487686049] [2020-12-23 13:05:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487686049] [2020-12-23 13:05:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416632821] [2020-12-23 13:05:39,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:39,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:05:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:05:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:39,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:39,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-23 13:05:39,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243440038] [2020-12-23 13:05:39,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:39,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:39,764 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 8 states. [2020-12-23 13:05:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:39,850 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-12-23 13:05:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:05:39,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 13:05:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:39,852 INFO L225 Difference]: With dead ends: 72 [2020-12-23 13:05:39,852 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 13:05:39,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 13:05:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-12-23 13:05:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:05:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-12-23 13:05:39,856 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-12-23 13:05:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:39,857 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-12-23 13:05:39,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-12-23 13:05:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:05:39,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:39,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:40,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:40,072 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1217357142, now seen corresponding path program 10 times [2020-12-23 13:05:40,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:40,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044638460] [2020-12-23 13:05:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:40,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044638460] [2020-12-23 13:05:40,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707476744] [2020-12-23 13:05:40,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:40,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:40,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:05:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:40,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:40,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-23 13:05:40,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202725455] [2020-12-23 13:05:40,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:40,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:40,213 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-12-23 13:05:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:40,329 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-12-23 13:05:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:40,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 13:05:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:40,330 INFO L225 Difference]: With dead ends: 87 [2020-12-23 13:05:40,330 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 13:05:40,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 13:05:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2020-12-23 13:05:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 13:05:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2020-12-23 13:05:40,335 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 12 [2020-12-23 13:05:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:40,335 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2020-12-23 13:05:40,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2020-12-23 13:05:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:05:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:40,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:40,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:40,551 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1217334822, now seen corresponding path program 11 times [2020-12-23 13:05:40,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:40,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682476603] [2020-12-23 13:05:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:40,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682476603] [2020-12-23 13:05:40,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732713915] [2020-12-23 13:05:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:40,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:05:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:40,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:40,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 13:05:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945687524] [2020-12-23 13:05:40,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:40,701 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand 9 states. [2020-12-23 13:05:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:40,942 INFO L93 Difference]: Finished difference Result 71 states and 169 transitions. [2020-12-23 13:05:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:40,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-23 13:05:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:40,944 INFO L225 Difference]: With dead ends: 71 [2020-12-23 13:05:40,944 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 13:05:40,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:05:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 13:05:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-12-23 13:05:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:05:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-12-23 13:05:40,949 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 12 [2020-12-23 13:05:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:40,949 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-12-23 13:05:40,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-12-23 13:05:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:40,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:40,950 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:41,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 13:05:41,164 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:41,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1750964035, now seen corresponding path program 12 times [2020-12-23 13:05:41,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:41,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602147068] [2020-12-23 13:05:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:41,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602147068] [2020-12-23 13:05:41,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336162595] [2020-12-23 13:05:41,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:41,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:05:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:05:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:41,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:41,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 13:05:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555739777] [2020-12-23 13:05:41,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:05:41,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:05:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:41,391 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-12-23 13:05:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:41,552 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-12-23 13:05:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:41,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 13:05:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:41,554 INFO L225 Difference]: With dead ends: 67 [2020-12-23 13:05:41,554 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 13:05:41,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:05:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 13:05:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-12-23 13:05:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 13:05:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-12-23 13:05:41,558 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-12-23 13:05:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:41,558 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-12-23 13:05:41,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:05:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-12-23 13:05:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:41,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:41,559 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:41,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 13:05:41,773 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1773220795, now seen corresponding path program 13 times [2020-12-23 13:05:41,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:41,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139499831] [2020-12-23 13:05:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:41,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139499831] [2020-12-23 13:05:41,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694602109] [2020-12-23 13:05:41,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:05:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:41,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 13:05:41,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964196358] [2020-12-23 13:05:41,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:05:41,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:05:41,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:41,929 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-12-23 13:05:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:42,121 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-12-23 13:05:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:42,121 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 13:05:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:42,122 INFO L225 Difference]: With dead ends: 89 [2020-12-23 13:05:42,122 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 13:05:42,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:05:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 13:05:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 52. [2020-12-23 13:05:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 13:05:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-12-23 13:05:42,127 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-12-23 13:05:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:42,128 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-12-23 13:05:42,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:05:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-12-23 13:05:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:42,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:42,129 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:42,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 13:05:42,343 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1773243115, now seen corresponding path program 14 times [2020-12-23 13:05:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:42,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128935105] [2020-12-23 13:05:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128935105] [2020-12-23 13:05:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578660075] [2020-12-23 13:05:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:42,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:42,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:42,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:42,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:42,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 13:05:42,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666740705] [2020-12-23 13:05:42,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:42,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:42,566 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 11 states. [2020-12-23 13:05:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:42,858 INFO L93 Difference]: Finished difference Result 84 states and 198 transitions. [2020-12-23 13:05:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:42,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 13:05:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:42,859 INFO L225 Difference]: With dead ends: 84 [2020-12-23 13:05:42,859 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 13:05:42,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:05:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 13:05:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-12-23 13:05:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 13:05:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 127 transitions. [2020-12-23 13:05:42,863 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 127 transitions. Word has length 13 [2020-12-23 13:05:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:42,864 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 127 transitions. [2020-12-23 13:05:42,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 127 transitions. [2020-12-23 13:05:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:42,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:42,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:43,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 13:05:43,076 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 933092168, now seen corresponding path program 15 times [2020-12-23 13:05:43,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:43,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917932890] [2020-12-23 13:05:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:43,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917932890] [2020-12-23 13:05:43,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136196600] [2020-12-23 13:05:43,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:43,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:05:43,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:43,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:43,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:43,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 13:05:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904158009] [2020-12-23 13:05:43,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:43,301 INFO L87 Difference]: Start difference. First operand 51 states and 127 transitions. Second operand 11 states. [2020-12-23 13:05:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:43,473 INFO L93 Difference]: Finished difference Result 66 states and 157 transitions. [2020-12-23 13:05:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:05:43,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-23 13:05:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:43,474 INFO L225 Difference]: With dead ends: 66 [2020-12-23 13:05:43,474 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 13:05:43,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:05:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 13:05:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-23 13:05:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:05:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-23 13:05:43,478 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2020-12-23 13:05:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:43,478 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-23 13:05:43,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-23 13:05:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:43,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:43,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:43,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 13:05:43,694 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1563003562, now seen corresponding path program 16 times [2020-12-23 13:05:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:43,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413384454] [2020-12-23 13:05:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:43,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413384454] [2020-12-23 13:05:43,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127615310] [2020-12-23 13:05:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:43,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:43,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:43,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:43,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:43,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:43,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-23 13:05:43,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972477039] [2020-12-23 13:05:43,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:05:43,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:43,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:05:43,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:43,929 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2020-12-23 13:05:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:44,063 INFO L93 Difference]: Finished difference Result 87 states and 199 transitions. [2020-12-23 13:05:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:44,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-23 13:05:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:44,064 INFO L225 Difference]: With dead ends: 87 [2020-12-23 13:05:44,064 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 13:05:44,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:05:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 13:05:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2020-12-23 13:05:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:05:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-23 13:05:44,067 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2020-12-23 13:05:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:44,068 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-23 13:05:44,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:05:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-23 13:05:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:44,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:44,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:44,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:44,282 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:44,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1649093682, now seen corresponding path program 17 times [2020-12-23 13:05:44,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:44,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614737279] [2020-12-23 13:05:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:44,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614737279] [2020-12-23 13:05:44,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060712162] [2020-12-23 13:05:44,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:44,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:05:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:44,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:44,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-23 13:05:44,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439365045] [2020-12-23 13:05:44,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:05:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:05:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:44,463 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2020-12-23 13:05:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:44,611 INFO L93 Difference]: Finished difference Result 80 states and 185 transitions. [2020-12-23 13:05:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:44,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-23 13:05:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:44,612 INFO L225 Difference]: With dead ends: 80 [2020-12-23 13:05:44,612 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 13:05:44,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:05:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 13:05:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-12-23 13:05:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:05:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-23 13:05:44,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2020-12-23 13:05:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:44,616 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-23 13:05:44,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:05:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-23 13:05:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:44,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:44,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:44,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:44,831 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:44,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1626836922, now seen corresponding path program 18 times [2020-12-23 13:05:44,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:44,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841618360] [2020-12-23 13:05:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841618360] [2020-12-23 13:05:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938087989] [2020-12-23 13:05:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:44,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:05:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:45,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:45,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-23 13:05:45,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881656888] [2020-12-23 13:05:45,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:05:45,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:05:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:45,009 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2020-12-23 13:05:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:45,208 INFO L93 Difference]: Finished difference Result 97 states and 227 transitions. [2020-12-23 13:05:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:45,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-23 13:05:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:45,210 INFO L225 Difference]: With dead ends: 97 [2020-12-23 13:05:45,210 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 13:05:45,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:05:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 13:05:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2020-12-23 13:05:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 13:05:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 149 transitions. [2020-12-23 13:05:45,214 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 149 transitions. Word has length 14 [2020-12-23 13:05:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:45,214 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 149 transitions. [2020-12-23 13:05:45,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:05:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 149 transitions. [2020-12-23 13:05:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:45,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:45,215 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:45,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 13:05:45,431 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1626814602, now seen corresponding path program 19 times [2020-12-23 13:05:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:45,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313730609] [2020-12-23 13:05:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:45,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313730609] [2020-12-23 13:05:45,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601365965] [2020-12-23 13:05:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:45,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:45,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:45,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 13:05:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091323379] [2020-12-23 13:05:45,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:45,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:45,645 INFO L87 Difference]: Start difference. First operand 59 states and 149 transitions. Second operand 12 states. [2020-12-23 13:05:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:45,981 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-23 13:05:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:45,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 13:05:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:45,983 INFO L225 Difference]: With dead ends: 93 [2020-12-23 13:05:45,983 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 13:05:45,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:05:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 13:05:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-12-23 13:05:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 13:05:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2020-12-23 13:05:45,987 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 14 [2020-12-23 13:05:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:45,987 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2020-12-23 13:05:45,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2020-12-23 13:05:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:45,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:45,988 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:46,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:46,202 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash -950727129, now seen corresponding path program 20 times [2020-12-23 13:05:46,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:46,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771441834] [2020-12-23 13:05:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:46,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771441834] [2020-12-23 13:05:46,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596482709] [2020-12-23 13:05:46,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:46,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:46,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:46,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:46,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-23 13:05:46,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171108772] [2020-12-23 13:05:46,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:46,380 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand 11 states. [2020-12-23 13:05:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:46,579 INFO L93 Difference]: Finished difference Result 77 states and 177 transitions. [2020-12-23 13:05:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:46,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 13:05:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:46,584 INFO L225 Difference]: With dead ends: 77 [2020-12-23 13:05:46,584 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 13:05:46,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:05:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 13:05:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-12-23 13:05:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 13:05:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-12-23 13:05:46,588 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 15 [2020-12-23 13:05:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:46,588 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-12-23 13:05:46,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-12-23 13:05:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:46,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:46,589 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:46,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 13:05:46,801 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:46,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1036817249, now seen corresponding path program 21 times [2020-12-23 13:05:46,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:46,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194853743] [2020-12-23 13:05:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:46,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194853743] [2020-12-23 13:05:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136651769] [2020-12-23 13:05:46,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:46,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:05:46,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:46,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:46,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:46,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-23 13:05:46,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040121347] [2020-12-23 13:05:47,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:47,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:47,001 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 11 states. [2020-12-23 13:05:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:47,226 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-23 13:05:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:47,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 13:05:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:47,228 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:05:47,228 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 13:05:47,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:05:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 13:05:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-23 13:05:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:05:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-23 13:05:47,233 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 15 [2020-12-23 13:05:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:47,233 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-23 13:05:47,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-23 13:05:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:47,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:47,234 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:47,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 13:05:47,446 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1014534325, now seen corresponding path program 22 times [2020-12-23 13:05:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:47,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672277477] [2020-12-23 13:05:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:47,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672277477] [2020-12-23 13:05:47,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694254677] [2020-12-23 13:05:47,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:47,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:47,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:47,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:47,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:05:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:47,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:47,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 13:05:47,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241387022] [2020-12-23 13:05:47,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:47,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:47,636 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 12 states. [2020-12-23 13:05:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:47,926 INFO L93 Difference]: Finished difference Result 94 states and 224 transitions. [2020-12-23 13:05:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:05:47,927 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-23 13:05:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:47,928 INFO L225 Difference]: With dead ends: 94 [2020-12-23 13:05:47,928 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 13:05:47,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:05:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 13:05:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2020-12-23 13:05:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 13:05:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-12-23 13:05:47,932 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 15 [2020-12-23 13:05:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:47,932 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-12-23 13:05:47,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-12-23 13:05:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:47,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:47,933 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:48,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 13:05:48,147 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:48,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash -946576148, now seen corresponding path program 23 times [2020-12-23 13:05:48,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:48,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103906013] [2020-12-23 13:05:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:48,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103906013] [2020-12-23 13:05:48,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847746563] [2020-12-23 13:05:48,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:48,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:05:48,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:48,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:48,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:48,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199905751] [2020-12-23 13:05:48,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:48,446 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 13 states. [2020-12-23 13:05:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:48,661 INFO L93 Difference]: Finished difference Result 76 states and 179 transitions. [2020-12-23 13:05:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:05:48,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-23 13:05:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:48,663 INFO L225 Difference]: With dead ends: 76 [2020-12-23 13:05:48,663 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 13:05:48,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:05:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 13:05:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-23 13:05:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-23 13:05:48,667 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-23 13:05:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:48,667 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-23 13:05:48,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-23 13:05:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:48,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:48,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:48,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 13:05:48,883 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:48,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1192145786, now seen corresponding path program 24 times [2020-12-23 13:05:48,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:48,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172926519] [2020-12-23 13:05:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172926519] [2020-12-23 13:05:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92041488] [2020-12-23 13:05:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:49,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:05:49,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:49,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:49,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-23 13:05:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803740153] [2020-12-23 13:05:49,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:49,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:49,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:49,133 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-23 13:05:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:49,307 INFO L93 Difference]: Finished difference Result 101 states and 229 transitions. [2020-12-23 13:05:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:49,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:49,309 INFO L225 Difference]: With dead ends: 101 [2020-12-23 13:05:49,309 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 13:05:49,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:05:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 13:05:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2020-12-23 13:05:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-23 13:05:49,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-23 13:05:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:49,314 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-23 13:05:49,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-23 13:05:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:49,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:49,315 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:49,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 13:05:49,529 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:49,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:49,530 INFO L82 PathProgramCache]: Analyzing trace with hash 63919090, now seen corresponding path program 25 times [2020-12-23 13:05:49,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:49,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800525151] [2020-12-23 13:05:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:49,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800525151] [2020-12-23 13:05:49,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623087170] [2020-12-23 13:05:49,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:49,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:49,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-23 13:05:49,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260807522] [2020-12-23 13:05:49,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:49,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:49,718 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-23 13:05:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:49,910 INFO L93 Difference]: Finished difference Result 94 states and 215 transitions. [2020-12-23 13:05:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:49,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:49,912 INFO L225 Difference]: With dead ends: 94 [2020-12-23 13:05:49,912 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 13:05:49,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:05:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 13:05:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-12-23 13:05:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-23 13:05:49,916 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-23 13:05:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:49,916 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-23 13:05:49,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-23 13:05:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:49,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:49,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:50,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:50,129 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash -22171030, now seen corresponding path program 26 times [2020-12-23 13:05:50,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:50,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296489014] [2020-12-23 13:05:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:50,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296489014] [2020-12-23 13:05:50,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960118262] [2020-12-23 13:05:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:50,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:50,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:50,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:50,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:50,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-23 13:05:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108029739] [2020-12-23 13:05:50,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:50,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:50,321 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-23 13:05:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:50,553 INFO L93 Difference]: Finished difference Result 88 states and 203 transitions. [2020-12-23 13:05:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:50,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:50,555 INFO L225 Difference]: With dead ends: 88 [2020-12-23 13:05:50,555 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 13:05:50,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:05:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 13:05:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-12-23 13:05:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-23 13:05:50,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-23 13:05:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:50,559 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-23 13:05:50,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-23 13:05:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:50,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:50,560 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:50,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 13:05:50,774 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash 111894, now seen corresponding path program 27 times [2020-12-23 13:05:50,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:50,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878370309] [2020-12-23 13:05:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:50,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878370309] [2020-12-23 13:05:50,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796962999] [2020-12-23 13:05:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:50,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:05:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:05:50,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:50,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:50,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 13:05:50,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602637896] [2020-12-23 13:05:50,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:50,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:50,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:50,954 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-23 13:05:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:51,282 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-12-23 13:05:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:51,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:51,284 INFO L225 Difference]: With dead ends: 85 [2020-12-23 13:05:51,284 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 13:05:51,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:05:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 13:05:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-12-23 13:05:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-12-23 13:05:51,290 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 16 [2020-12-23 13:05:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:51,290 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-12-23 13:05:51,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-12-23 13:05:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:51,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:51,291 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:51,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:51,503 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 85730, now seen corresponding path program 28 times [2020-12-23 13:05:51,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:51,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487124830] [2020-12-23 13:05:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:51,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487124830] [2020-12-23 13:05:51,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741328676] [2020-12-23 13:05:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:51,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:51,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-23 13:05:51,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627182350] [2020-12-23 13:05:51,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:51,675 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 12 states. [2020-12-23 13:05:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:51,985 INFO L93 Difference]: Finished difference Result 110 states and 257 transitions. [2020-12-23 13:05:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:51,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:51,987 INFO L225 Difference]: With dead ends: 110 [2020-12-23 13:05:51,987 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 13:05:51,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:05:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 13:05:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2020-12-23 13:05:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-12-23 13:05:51,994 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 16 [2020-12-23 13:05:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:51,994 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-12-23 13:05:51,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-12-23 13:05:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:51,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:51,996 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:52,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 13:05:52,210 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash 108050, now seen corresponding path program 29 times [2020-12-23 13:05:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:52,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381755881] [2020-12-23 13:05:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381755881] [2020-12-23 13:05:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554617660] [2020-12-23 13:05:52,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:52,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:05:52,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:52,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:52,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:52,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:52,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428919954] [2020-12-23 13:05:52,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:52,367 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 13 states. [2020-12-23 13:05:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:52,794 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2020-12-23 13:05:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:05:52,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-23 13:05:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:52,796 INFO L225 Difference]: With dead ends: 88 [2020-12-23 13:05:52,796 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 13:05:52,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:05:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 13:05:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-12-23 13:05:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 13:05:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-12-23 13:05:52,800 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 16 [2020-12-23 13:05:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:52,800 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-12-23 13:05:52,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-12-23 13:05:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:52,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:52,801 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:53,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:53,015 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 30 times [2020-12-23 13:05:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:53,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387718166] [2020-12-23 13:05:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:53,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387718166] [2020-12-23 13:05:53,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158363437] [2020-12-23 13:05:53,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:53,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 13:05:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:53,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:53,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-23 13:05:53,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306406330] [2020-12-23 13:05:53,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:53,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:53,215 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 13 states. [2020-12-23 13:05:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:53,467 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-23 13:05:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:53,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:53,469 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:05:53,469 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 13:05:53,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:05:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 13:05:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-23 13:05:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:05:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-23 13:05:53,473 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-12-23 13:05:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:53,473 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-23 13:05:53,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-23 13:05:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:53,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:53,474 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:53,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 13:05:53,675 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 31 times [2020-12-23 13:05:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:53,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377673160] [2020-12-23 13:05:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:53,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377673160] [2020-12-23 13:05:53,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951594252] [2020-12-23 13:05:53,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:53,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:53,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:53,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-23 13:05:53,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128532257] [2020-12-23 13:05:53,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:53,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:53,874 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 13 states. [2020-12-23 13:05:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:54,171 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2020-12-23 13:05:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:54,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:54,172 INFO L225 Difference]: With dead ends: 90 [2020-12-23 13:05:54,172 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 13:05:54,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:05:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 13:05:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-23 13:05:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 13:05:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-12-23 13:05:54,182 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-12-23 13:05:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:54,182 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-12-23 13:05:54,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-12-23 13:05:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:54,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:54,182 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:54,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:54,389 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 32 times [2020-12-23 13:05:54,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:54,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592338272] [2020-12-23 13:05:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:54,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592338272] [2020-12-23 13:05:54,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596232460] [2020-12-23 13:05:54,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:54,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:54,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:54,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-23 13:05:54,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13379249] [2020-12-23 13:05:54,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:54,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:54,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:54,577 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-12-23 13:05:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:54,884 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-12-23 13:05:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:05:54,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:54,886 INFO L225 Difference]: With dead ends: 88 [2020-12-23 13:05:54,886 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 13:05:54,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:05:54,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 13:05:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-12-23 13:05:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 13:05:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-12-23 13:05:54,890 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-12-23 13:05:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:54,890 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-12-23 13:05:54,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-12-23 13:05:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:54,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:54,891 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:55,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 13:05:55,106 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 33 times [2020-12-23 13:05:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:55,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387196931] [2020-12-23 13:05:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:55,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387196931] [2020-12-23 13:05:55,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146132146] [2020-12-23 13:05:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:55,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 13:05:55,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:55,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:55,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-23 13:05:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551498545] [2020-12-23 13:05:55,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:55,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:55,307 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 13 states. [2020-12-23 13:05:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:55,653 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-12-23 13:05:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:05:55,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:55,655 INFO L225 Difference]: With dead ends: 105 [2020-12-23 13:05:55,655 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 13:05:55,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:05:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 13:05:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2020-12-23 13:05:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:05:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-12-23 13:05:55,659 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-12-23 13:05:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:55,659 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-12-23 13:05:55,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-12-23 13:05:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:55,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:55,660 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:55,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:55,874 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:55,874 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 34 times [2020-12-23 13:05:55,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:55,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343655847] [2020-12-23 13:05:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:55,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343655847] [2020-12-23 13:05:55,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991271217] [2020-12-23 13:05:55,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:56,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:56,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:56,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:05:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060836563] [2020-12-23 13:05:56,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:56,053 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-12-23 13:05:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:56,503 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-12-23 13:05:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:05:56,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:56,504 INFO L225 Difference]: With dead ends: 88 [2020-12-23 13:05:56,504 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 13:05:56,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:05:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 13:05:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-12-23 13:05:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 13:05:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-12-23 13:05:56,509 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-12-23 13:05:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:56,510 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-12-23 13:05:56,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-12-23 13:05:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:05:56,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:56,510 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:56,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 13:05:56,725 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 35 times [2020-12-23 13:05:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:56,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105683421] [2020-12-23 13:05:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:56,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105683421] [2020-12-23 13:05:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609406554] [2020-12-23 13:05:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:56,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 13:05:56,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:05:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:56,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:56,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 13:05:56,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073585247] [2020-12-23 13:05:56,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:05:56,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:05:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:05:56,989 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 16 states. [2020-12-23 13:05:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:57,228 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-12-23 13:05:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:05:57,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 13:05:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:57,229 INFO L225 Difference]: With dead ends: 69 [2020-12-23 13:05:57,230 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 13:05:57,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:05:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 13:05:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-23 13:05:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 13:05:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-12-23 13:05:57,238 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-12-23 13:05:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:57,238 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-12-23 13:05:57,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:05:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-12-23 13:05:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:05:57,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:57,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:57,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 13:05:57,452 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1104152418, now seen corresponding path program 36 times [2020-12-23 13:05:57,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:57,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177151669] [2020-12-23 13:05:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177151669] [2020-12-23 13:05:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040551880] [2020-12-23 13:05:57,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:57,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 13:05:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:05:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:57,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:57,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 13:05:57,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706757198] [2020-12-23 13:05:57,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:05:57,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:05:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:57,685 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-12-23 13:05:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:57,888 INFO L93 Difference]: Finished difference Result 102 states and 229 transitions. [2020-12-23 13:05:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:57,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 13:05:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:57,889 INFO L225 Difference]: With dead ends: 102 [2020-12-23 13:05:57,890 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 13:05:57,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:05:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 13:05:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2020-12-23 13:05:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 13:05:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-12-23 13:05:57,894 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 18 [2020-12-23 13:05:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:57,895 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-12-23 13:05:57,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:05:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-12-23 13:05:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:05:57,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:57,895 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:58,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 13:05:58,110 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1296718614, now seen corresponding path program 37 times [2020-12-23 13:05:58,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:58,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334861188] [2020-12-23 13:05:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:58,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334861188] [2020-12-23 13:05:58,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488761926] [2020-12-23 13:05:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:05:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:58,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:58,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 13:05:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17267061] [2020-12-23 13:05:58,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:05:58,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:05:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:58,325 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 15 states. [2020-12-23 13:05:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:58,578 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2020-12-23 13:05:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:58,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 13:05:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:58,579 INFO L225 Difference]: With dead ends: 97 [2020-12-23 13:05:58,580 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 13:05:58,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:05:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 13:05:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-12-23 13:05:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 13:05:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-12-23 13:05:58,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 18 [2020-12-23 13:05:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:58,583 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-12-23 13:05:58,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:05:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-12-23 13:05:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:05:58,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:58,584 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:58,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 13:05:58,798 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:58,798 INFO L82 PathProgramCache]: Analyzing trace with hash 168491918, now seen corresponding path program 38 times [2020-12-23 13:05:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:58,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012869968] [2020-12-23 13:05:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:58,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012869968] [2020-12-23 13:05:58,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658340742] [2020-12-23 13:05:58,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:58,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:58,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:58,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:05:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:59,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:59,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 13:05:59,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913801047] [2020-12-23 13:05:59,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:05:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:59,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:05:59,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:59,013 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 15 states. [2020-12-23 13:05:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:59,314 INFO L93 Difference]: Finished difference Result 95 states and 219 transitions. [2020-12-23 13:05:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:59,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 13:05:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:59,316 INFO L225 Difference]: With dead ends: 95 [2020-12-23 13:05:59,316 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 13:05:59,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:05:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 13:05:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2020-12-23 13:05:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 13:05:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-12-23 13:05:59,325 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 18 [2020-12-23 13:05:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:59,326 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-12-23 13:05:59,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:05:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-12-23 13:05:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:05:59,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:59,328 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:59,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:59,537 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:59,537 INFO L82 PathProgramCache]: Analyzing trace with hash 82401798, now seen corresponding path program 39 times [2020-12-23 13:05:59,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:59,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304334551] [2020-12-23 13:05:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304334551] [2020-12-23 13:05:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237146173] [2020-12-23 13:05:59,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:59,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 13:05:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:05:59,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:59,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:59,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 13:05:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893525537] [2020-12-23 13:05:59,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:05:59,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:59,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:05:59,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:59,730 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 15 states. [2020-12-23 13:06:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:00,095 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-23 13:06:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:06:00,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 13:06:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:00,097 INFO L225 Difference]: With dead ends: 93 [2020-12-23 13:06:00,097 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 13:06:00,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:06:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 13:06:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-12-23 13:06:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:06:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-23 13:06:00,101 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-12-23 13:06:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:00,102 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-23 13:06:00,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-23 13:06:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:06:00,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:00,103 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:00,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 13:06:00,303 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 104658558, now seen corresponding path program 40 times [2020-12-23 13:06:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:00,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804457211] [2020-12-23 13:06:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:00,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804457211] [2020-12-23 13:06:00,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307568229] [2020-12-23 13:06:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:00,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:00,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:06:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:00,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:00,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 13:06:00,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819133737] [2020-12-23 13:06:00,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:06:00,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:00,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:06:00,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:06:00,495 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-12-23 13:06:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:00,881 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-12-23 13:06:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:00,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 13:06:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:00,883 INFO L225 Difference]: With dead ends: 111 [2020-12-23 13:06:00,883 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:06:00,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:06:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:06:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2020-12-23 13:06:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 13:06:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 177 transitions. [2020-12-23 13:06:00,888 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 177 transitions. Word has length 18 [2020-12-23 13:06:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:00,888 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 177 transitions. [2020-12-23 13:06:00,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 177 transitions. [2020-12-23 13:06:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:06:00,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:00,889 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:01,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 13:06:01,101 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash 104680878, now seen corresponding path program 41 times [2020-12-23 13:06:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:01,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192717615] [2020-12-23 13:06:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:01,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192717615] [2020-12-23 13:06:01,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765173685] [2020-12-23 13:06:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:01,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 13:06:01,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:06:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:01,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:01,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 13:06:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253075427] [2020-12-23 13:06:01,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:01,315 INFO L87 Difference]: Start difference. First operand 69 states and 177 transitions. Second operand 16 states. [2020-12-23 13:06:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:01,888 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2020-12-23 13:06:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:01,889 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 13:06:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:01,890 INFO L225 Difference]: With dead ends: 109 [2020-12-23 13:06:01,890 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 13:06:01,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:06:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 13:06:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-12-23 13:06:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:06:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-23 13:06:01,894 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 18 [2020-12-23 13:06:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:01,895 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-23 13:06:01,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-23 13:06:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 13:06:01,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:01,895 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:02,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:02,103 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -584859409, now seen corresponding path program 42 times [2020-12-23 13:06:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:02,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340517275] [2020-12-23 13:06:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:02,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340517275] [2020-12-23 13:06:02,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822790301] [2020-12-23 13:06:02,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:02,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 13:06:02,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:06:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:02,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:02,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-23 13:06:02,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734204451] [2020-12-23 13:06:02,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:06:02,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:06:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:06:02,355 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-23 13:06:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:02,646 INFO L93 Difference]: Finished difference Result 100 states and 235 transitions. [2020-12-23 13:06:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:06:02,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-23 13:06:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:02,647 INFO L225 Difference]: With dead ends: 100 [2020-12-23 13:06:02,647 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 13:06:02,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:06:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 13:06:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2020-12-23 13:06:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:06:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-23 13:06:02,652 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-23 13:06:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:02,652 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-23 13:06:02,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-23 13:06:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 13:06:02,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:02,653 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:02,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 13:06:02,855 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1816011623, now seen corresponding path program 43 times [2020-12-23 13:06:02,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:02,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029314875] [2020-12-23 13:06:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029314875] [2020-12-23 13:06:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312777847] [2020-12-23 13:06:02,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:06:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:03,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:03,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-23 13:06:03,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951195775] [2020-12-23 13:06:03,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:06:03,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:06:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:06:03,085 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-23 13:06:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:03,406 INFO L93 Difference]: Finished difference Result 107 states and 249 transitions. [2020-12-23 13:06:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:06:03,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-23 13:06:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:03,407 INFO L225 Difference]: With dead ends: 107 [2020-12-23 13:06:03,407 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 13:06:03,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:06:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 13:06:03,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-12-23 13:06:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:06:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-23 13:06:03,410 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-23 13:06:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:03,410 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-23 13:06:03,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-23 13:06:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 13:06:03,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:03,411 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:03,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:03,612 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:03,613 INFO L82 PathProgramCache]: Analyzing trace with hash 687784927, now seen corresponding path program 44 times [2020-12-23 13:06:03,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:03,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984232370] [2020-12-23 13:06:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:03,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984232370] [2020-12-23 13:06:03,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605686091] [2020-12-23 13:06:03,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:03,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:06:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:03,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:03,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-23 13:06:03,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547601467] [2020-12-23 13:06:03,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:06:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:06:03,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:06:03,843 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-23 13:06:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:04,193 INFO L93 Difference]: Finished difference Result 103 states and 241 transitions. [2020-12-23 13:06:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:04,194 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-23 13:06:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:04,195 INFO L225 Difference]: With dead ends: 103 [2020-12-23 13:06:04,195 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 13:06:04,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:06:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 13:06:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-12-23 13:06:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:06:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-23 13:06:04,199 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-23 13:06:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:04,200 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-23 13:06:04,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-23 13:06:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 13:06:04,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:04,200 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:04,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 13:06:04,414 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 601694807, now seen corresponding path program 45 times [2020-12-23 13:06:04,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:04,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681347139] [2020-12-23 13:06:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:04,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681347139] [2020-12-23 13:06:04,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465421912] [2020-12-23 13:06:04,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:04,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 13:06:04,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:06:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:04,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:04,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-23 13:06:04,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858625816] [2020-12-23 13:06:04,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:06:04,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:06:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:06:04,620 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-23 13:06:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:05,026 INFO L93 Difference]: Finished difference Result 99 states and 233 transitions. [2020-12-23 13:06:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:05,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-23 13:06:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:05,028 INFO L225 Difference]: With dead ends: 99 [2020-12-23 13:06:05,028 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 13:06:05,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:06:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 13:06:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2020-12-23 13:06:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:06:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-23 13:06:05,032 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-23 13:06:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:05,033 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-23 13:06:05,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-23 13:06:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 13:06:05,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:05,033 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:05,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:05,247 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:05,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash 623951567, now seen corresponding path program 46 times [2020-12-23 13:06:05,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:05,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100306851] [2020-12-23 13:06:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:05,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100306851] [2020-12-23 13:06:05,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644416385] [2020-12-23 13:06:05,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:05,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:05,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:05,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:06:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:05,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:05,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-23 13:06:05,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096997822] [2020-12-23 13:06:05,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:06:05,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:05,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:06:05,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:06:05,435 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-23 13:06:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:05,867 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2020-12-23 13:06:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:05,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-23 13:06:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:05,869 INFO L225 Difference]: With dead ends: 115 [2020-12-23 13:06:05,869 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 13:06:05,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:06:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 13:06:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 72. [2020-12-23 13:06:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 13:06:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-12-23 13:06:05,874 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 19 [2020-12-23 13:06:05,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:05,874 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-12-23 13:06:05,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:06:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-12-23 13:06:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 13:06:05,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:05,875 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:06,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 13:06:06,089 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash 623973887, now seen corresponding path program 47 times [2020-12-23 13:06:06,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:06,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530004494] [2020-12-23 13:06:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:06,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530004494] [2020-12-23 13:06:06,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676468219] [2020-12-23 13:06:06,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:06,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 13:06:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:06:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:06,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:06,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 13:06:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832493563] [2020-12-23 13:06:06,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:06,295 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 16 states. [2020-12-23 13:06:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:06,881 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2020-12-23 13:06:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:06,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-23 13:06:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:06,886 INFO L225 Difference]: With dead ends: 98 [2020-12-23 13:06:06,886 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 13:06:06,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:06:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 13:06:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-12-23 13:06:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 13:06:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2020-12-23 13:06:06,891 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 19 [2020-12-23 13:06:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:06,891 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2020-12-23 13:06:06,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2020-12-23 13:06:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:06,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:06,892 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:07,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 13:06:07,107 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1822436660, now seen corresponding path program 48 times [2020-12-23 13:06:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:07,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685370444] [2020-12-23 13:06:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685370444] [2020-12-23 13:06:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62539542] [2020-12-23 13:06:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:07,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 13:06:07,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:07,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:07,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:07,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 13:06:07,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886038448] [2020-12-23 13:06:07,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:07,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:07,395 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand 17 states. [2020-12-23 13:06:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:07,701 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2020-12-23 13:06:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:06:07,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-23 13:06:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:07,703 INFO L225 Difference]: With dead ends: 90 [2020-12-23 13:06:07,703 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 13:06:07,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:06:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 13:06:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-12-23 13:06:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:07,707 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-23 13:06:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:07,708 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:07,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:07,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:07,709 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:07,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:07,923 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash -233536318, now seen corresponding path program 49 times [2020-12-23 13:06:07,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:07,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619056886] [2020-12-23 13:06:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619056886] [2020-12-23 13:06:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607936997] [2020-12-23 13:06:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:06:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:08,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:08,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 13:06:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871193713] [2020-12-23 13:06:08,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:08,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:08,161 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-23 13:06:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:08,434 INFO L93 Difference]: Finished difference Result 123 states and 283 transitions. [2020-12-23 13:06:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:06:08,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:08,436 INFO L225 Difference]: With dead ends: 123 [2020-12-23 13:06:08,436 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 13:06:08,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:06:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 13:06:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2020-12-23 13:06:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:08,440 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-23 13:06:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:08,441 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:08,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:08,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:08,441 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:08,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 13:06:08,655 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash 606087482, now seen corresponding path program 50 times [2020-12-23 13:06:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:08,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094898296] [2020-12-23 13:06:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:08,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094898296] [2020-12-23 13:06:08,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3542419] [2020-12-23 13:06:08,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:08,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:06:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:08,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:08,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 13:06:08,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531325575] [2020-12-23 13:06:08,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:08,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:08,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:08,872 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-23 13:06:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:09,172 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2020-12-23 13:06:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:06:09,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:09,173 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:06:09,173 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 13:06:09,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:06:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 13:06:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2020-12-23 13:06:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:09,178 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-23 13:06:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:09,178 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:09,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:09,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:09,179 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:09,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:09,388 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1288008782, now seen corresponding path program 51 times [2020-12-23 13:06:09,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:09,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54975856] [2020-12-23 13:06:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:09,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54975856] [2020-12-23 13:06:09,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354247400] [2020-12-23 13:06:09,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:09,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 13:06:09,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:09,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 13:06:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887542781] [2020-12-23 13:06:09,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:09,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:09,653 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-23 13:06:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:10,011 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-12-23 13:06:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:06:10,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:10,012 INFO L225 Difference]: With dead ends: 112 [2020-12-23 13:06:10,012 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 13:06:10,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:06:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 13:06:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2020-12-23 13:06:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:10,017 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-23 13:06:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:10,017 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:10,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:10,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:10,018 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:10,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:10,232 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1878731818, now seen corresponding path program 52 times [2020-12-23 13:06:10,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:10,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189380172] [2020-12-23 13:06:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:10,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189380172] [2020-12-23 13:06:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503639687] [2020-12-23 13:06:10,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:10,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:10,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:10,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:06:10,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:10,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:10,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 13:06:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266056877] [2020-12-23 13:06:10,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:10,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:10,452 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-23 13:06:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:10,845 INFO L93 Difference]: Finished difference Result 108 states and 253 transitions. [2020-12-23 13:06:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:10,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:10,846 INFO L225 Difference]: With dead ends: 108 [2020-12-23 13:06:10,846 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 13:06:10,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:06:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 13:06:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-12-23 13:06:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:10,850 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-23 13:06:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:10,850 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:10,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:10,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:10,851 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:11,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 13:06:11,064 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1792641698, now seen corresponding path program 53 times [2020-12-23 13:06:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:11,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571271452] [2020-12-23 13:06:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571271452] [2020-12-23 13:06:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444185919] [2020-12-23 13:06:11,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:11,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 13:06:11,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:06:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:11,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:11,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 13:06:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109302134] [2020-12-23 13:06:11,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:11,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:11,260 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-23 13:06:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:11,701 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-12-23 13:06:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:11,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:11,703 INFO L225 Difference]: With dead ends: 104 [2020-12-23 13:06:11,703 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 13:06:11,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:06:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 13:06:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2020-12-23 13:06:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:11,707 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-23 13:06:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:11,708 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:11,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:11,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:11,708 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:11,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:11,922 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:11,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1814924622, now seen corresponding path program 54 times [2020-12-23 13:06:11,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:11,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163805198] [2020-12-23 13:06:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:06:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163805198] [2020-12-23 13:06:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412172495] [2020-12-23 13:06:12,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:12,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 13:06:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:06:12,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:06:12,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:12,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 13:06:12,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494526048] [2020-12-23 13:06:12,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:12,152 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-23 13:06:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:12,670 INFO L93 Difference]: Finished difference Result 97 states and 235 transitions. [2020-12-23 13:06:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:12,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:12,672 INFO L225 Difference]: With dead ends: 97 [2020-12-23 13:06:12,672 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 13:06:12,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:06:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 13:06:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-12-23 13:06:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 13:06:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-12-23 13:06:12,676 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-12-23 13:06:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:12,676 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-12-23 13:06:12,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-12-23 13:06:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:12,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:12,677 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:12,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 13:06:12,892 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:12,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1814898458, now seen corresponding path program 55 times [2020-12-23 13:06:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:12,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857190805] [2020-12-23 13:06:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857190805] [2020-12-23 13:06:12,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628802896] [2020-12-23 13:06:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:06:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:13,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:13,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 13:06:13,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478494856] [2020-12-23 13:06:13,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:06:13,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:06:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:06:13,086 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2020-12-23 13:06:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:13,557 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-12-23 13:06:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:13,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 13:06:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:13,558 INFO L225 Difference]: With dead ends: 119 [2020-12-23 13:06:13,558 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:06:13,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:06:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:06:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2020-12-23 13:06:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 13:06:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 193 transitions. [2020-12-23 13:06:13,562 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 193 transitions. Word has length 20 [2020-12-23 13:06:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:13,562 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 193 transitions. [2020-12-23 13:06:13,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:06:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 193 transitions. [2020-12-23 13:06:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 13:06:13,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:13,563 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:13,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 13:06:13,777 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1814920778, now seen corresponding path program 56 times [2020-12-23 13:06:13,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:13,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029904072] [2020-12-23 13:06:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:13,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029904072] [2020-12-23 13:06:13,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776605445] [2020-12-23 13:06:13,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:13,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:13,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:06:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:13,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:13,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 13:06:13,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878535154] [2020-12-23 13:06:13,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:13,993 INFO L87 Difference]: Start difference. First operand 75 states and 193 transitions. Second operand 17 states. [2020-12-23 13:06:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:14,631 INFO L93 Difference]: Finished difference Result 103 states and 249 transitions. [2020-12-23 13:06:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:14,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-23 13:06:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:14,633 INFO L225 Difference]: With dead ends: 103 [2020-12-23 13:06:14,633 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 13:06:14,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:06:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 13:06:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2020-12-23 13:06:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 13:06:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-12-23 13:06:14,636 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 20 [2020-12-23 13:06:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:14,636 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-12-23 13:06:14,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-12-23 13:06:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:14,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:14,637 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:14,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 13:06:14,838 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash 590838995, now seen corresponding path program 57 times [2020-12-23 13:06:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076797405] [2020-12-23 13:06:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:14,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076797405] [2020-12-23 13:06:14,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932658233] [2020-12-23 13:06:15,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:15,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 13:06:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:06:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:15,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:15,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-23 13:06:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416832050] [2020-12-23 13:06:15,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:15,109 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 17 states. [2020-12-23 13:06:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:15,459 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-12-23 13:06:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:06:15,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-23 13:06:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:15,461 INFO L225 Difference]: With dead ends: 99 [2020-12-23 13:06:15,461 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 13:06:15,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:06:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 13:06:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-12-23 13:06:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:06:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-12-23 13:06:15,464 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-12-23 13:06:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:15,464 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-12-23 13:06:15,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-12-23 13:06:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:15,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:15,465 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:15,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 13:06:15,681 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1430462795, now seen corresponding path program 58 times [2020-12-23 13:06:15,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:15,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965376139] [2020-12-23 13:06:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:15,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965376139] [2020-12-23 13:06:15,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233574013] [2020-12-23 13:06:15,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:15,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:15,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:06:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:15,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:15,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-23 13:06:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899316115] [2020-12-23 13:06:15,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:15,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:15,930 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 17 states. [2020-12-23 13:06:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:16,299 INFO L93 Difference]: Finished difference Result 110 states and 251 transitions. [2020-12-23 13:06:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:16,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-23 13:06:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:16,300 INFO L225 Difference]: With dead ends: 110 [2020-12-23 13:06:16,301 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 13:06:16,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:06:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 13:06:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2020-12-23 13:06:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 13:06:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-12-23 13:06:16,305 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-12-23 13:06:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:16,305 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-12-23 13:06:16,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-12-23 13:06:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:16,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:16,306 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:16,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:16,518 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash -463633469, now seen corresponding path program 59 times [2020-12-23 13:06:16,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:16,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30439385] [2020-12-23 13:06:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:16,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30439385] [2020-12-23 13:06:16,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852018545] [2020-12-23 13:06:16,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:16,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 13:06:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:06:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:16,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:16,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-23 13:06:16,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130325224] [2020-12-23 13:06:16,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:16,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:16,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:16,768 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 17 states. [2020-12-23 13:06:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:17,206 INFO L93 Difference]: Finished difference Result 108 states and 249 transitions. [2020-12-23 13:06:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:17,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-23 13:06:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:17,208 INFO L225 Difference]: With dead ends: 108 [2020-12-23 13:06:17,208 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 13:06:17,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:06:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 13:06:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2020-12-23 13:06:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 13:06:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-12-23 13:06:17,211 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-12-23 13:06:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:17,212 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-12-23 13:06:17,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-12-23 13:06:17,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:17,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:17,212 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:17,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:17,425 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1591860165, now seen corresponding path program 60 times [2020-12-23 13:06:17,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:17,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530172861] [2020-12-23 13:06:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530172861] [2020-12-23 13:06:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763361447] [2020-12-23 13:06:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:17,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 13:06:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:17,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:17,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:17,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:17,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-23 13:06:17,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611042002] [2020-12-23 13:06:17,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:17,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:17,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:17,656 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 17 states. [2020-12-23 13:06:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:18,142 INFO L93 Difference]: Finished difference Result 106 states and 247 transitions. [2020-12-23 13:06:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:18,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-23 13:06:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:18,143 INFO L225 Difference]: With dead ends: 106 [2020-12-23 13:06:18,144 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 13:06:18,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:06:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 13:06:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-12-23 13:06:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 13:06:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-12-23 13:06:18,147 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-12-23 13:06:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:18,148 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-12-23 13:06:18,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-12-23 13:06:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:18,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:18,148 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:18,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:18,364 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1677950285, now seen corresponding path program 61 times [2020-12-23 13:06:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:18,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108442660] [2020-12-23 13:06:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:18,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108442660] [2020-12-23 13:06:18,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232543499] [2020-12-23 13:06:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:06:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:18,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:18,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-23 13:06:18,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002585278] [2020-12-23 13:06:18,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:18,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:18,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:18,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:18,589 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-12-23 13:06:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:19,071 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-12-23 13:06:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:06:19,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-23 13:06:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:19,073 INFO L225 Difference]: With dead ends: 104 [2020-12-23 13:06:19,073 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 13:06:19,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:06:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 13:06:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-12-23 13:06:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 13:06:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-12-23 13:06:19,076 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-12-23 13:06:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:19,076 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-12-23 13:06:19,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-12-23 13:06:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:19,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:19,077 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:19,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-23 13:06:19,291 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1655693525, now seen corresponding path program 62 times [2020-12-23 13:06:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:19,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495110809] [2020-12-23 13:06:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:19,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495110809] [2020-12-23 13:06:19,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409136940] [2020-12-23 13:06:19,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:19,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:06:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:19,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:19,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-23 13:06:19,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13012079] [2020-12-23 13:06:19,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:06:19,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:19,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:06:19,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:06:19,526 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 17 states. [2020-12-23 13:06:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:20,089 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-12-23 13:06:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:06:20,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-23 13:06:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:20,091 INFO L225 Difference]: With dead ends: 121 [2020-12-23 13:06:20,091 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 13:06:20,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:06:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 13:06:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2020-12-23 13:06:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 13:06:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-12-23 13:06:20,095 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-12-23 13:06:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:20,095 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-12-23 13:06:20,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:06:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-12-23 13:06:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 13:06:20,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:20,096 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:20,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:20,297 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1655671205, now seen corresponding path program 63 times [2020-12-23 13:06:20,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:20,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480927368] [2020-12-23 13:06:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:20,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480927368] [2020-12-23 13:06:20,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026925085] [2020-12-23 13:06:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:20,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 13:06:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:20,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:20,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-23 13:06:20,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541917433] [2020-12-23 13:06:20,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:06:20,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:20,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:06:20,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:06:20,565 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 19 states. [2020-12-23 13:06:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:21,315 INFO L93 Difference]: Finished difference Result 116 states and 278 transitions. [2020-12-23 13:06:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:06:21,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-23 13:06:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:21,317 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:06:21,317 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 13:06:21,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=629, Invalid=1627, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 13:06:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 13:06:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2020-12-23 13:06:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 13:06:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2020-12-23 13:06:21,320 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 21 [2020-12-23 13:06:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:21,320 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2020-12-23 13:06:21,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:06:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2020-12-23 13:06:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:21,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:21,321 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:21,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 13:06:21,528 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -985011240, now seen corresponding path program 64 times [2020-12-23 13:06:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:21,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019674208] [2020-12-23 13:06:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:21,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019674208] [2020-12-23 13:06:21,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943349064] [2020-12-23 13:06:21,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:21,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:21,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:21,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:21,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 13:06:21,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416311754] [2020-12-23 13:06:21,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:06:21,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:06:21,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:06:21,845 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand 19 states. [2020-12-23 13:06:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:22,214 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2020-12-23 13:06:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:06:22,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 13:06:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:22,216 INFO L225 Difference]: With dead ends: 98 [2020-12-23 13:06:22,216 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 13:06:22,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:06:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 13:06:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-12-23 13:06:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:22,220 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:22,220 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:22,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:06:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:22,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:22,221 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:22,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:22,431 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1090086938, now seen corresponding path program 65 times [2020-12-23 13:06:22,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:22,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661183755] [2020-12-23 13:06:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:22,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661183755] [2020-12-23 13:06:22,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476830219] [2020-12-23 13:06:22,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:22,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 13:06:22,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:22,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:22,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:22,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443653460] [2020-12-23 13:06:22,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:22,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:22,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:22,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:22,716 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:23,040 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-12-23 13:06:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:06:23,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:23,042 INFO L225 Difference]: With dead ends: 135 [2020-12-23 13:06:23,042 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 13:06:23,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:06:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 13:06:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 79. [2020-12-23 13:06:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:23,046 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:23,047 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:23,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:23,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:23,048 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:23,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 13:06:23,261 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1665466786, now seen corresponding path program 66 times [2020-12-23 13:06:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:23,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511233277] [2020-12-23 13:06:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:23,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511233277] [2020-12-23 13:06:23,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423842243] [2020-12-23 13:06:23,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:23,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 13:06:23,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:23,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:23,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583413024] [2020-12-23 13:06:23,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:23,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:23,524 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:23,900 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-12-23 13:06:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:06:23,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:23,901 INFO L225 Difference]: With dead ends: 128 [2020-12-23 13:06:23,902 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 13:06:23,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:06:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 13:06:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2020-12-23 13:06:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:23,905 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:23,905 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:23,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:23,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:23,906 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:24,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:24,120 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash -825842986, now seen corresponding path program 67 times [2020-12-23 13:06:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:24,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957679303] [2020-12-23 13:06:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:24,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957679303] [2020-12-23 13:06:24,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416890707] [2020-12-23 13:06:24,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:24,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:24,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:24,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:24,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080850938] [2020-12-23 13:06:24,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:24,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:24,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:24,377 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:24,802 INFO L93 Difference]: Finished difference Result 124 states and 289 transitions. [2020-12-23 13:06:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:24,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:24,803 INFO L225 Difference]: With dead ends: 124 [2020-12-23 13:06:24,804 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 13:06:24,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:06:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 13:06:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2020-12-23 13:06:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:24,808 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:24,808 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:24,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:24,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:24,809 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:25,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 13:06:25,023 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1575028046, now seen corresponding path program 68 times [2020-12-23 13:06:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:25,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767690625] [2020-12-23 13:06:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767690625] [2020-12-23 13:06:25,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126545672] [2020-12-23 13:06:25,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:25,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:25,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:25,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:25,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:25,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759264162] [2020-12-23 13:06:25,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:25,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:25,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:25,294 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:25,819 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-12-23 13:06:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:25,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:25,821 INFO L225 Difference]: With dead ends: 120 [2020-12-23 13:06:25,821 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 13:06:25,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:06:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 13:06:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2020-12-23 13:06:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:25,824 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:25,825 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:25,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:25,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:25,826 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:26,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 13:06:26,034 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash 446801350, now seen corresponding path program 69 times [2020-12-23 13:06:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:26,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938743436] [2020-12-23 13:06:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938743436] [2020-12-23 13:06:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851753159] [2020-12-23 13:06:26,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:26,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 13:06:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:26,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:26,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:26,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:26,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100139013] [2020-12-23 13:06:26,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:26,275 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:26,899 INFO L93 Difference]: Finished difference Result 116 states and 273 transitions. [2020-12-23 13:06:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:26,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:26,901 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:06:26,901 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 13:06:26,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:06:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 13:06:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2020-12-23 13:06:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:26,904 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:26,904 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:26,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:26,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:26,905 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:27,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:27,112 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash 360711230, now seen corresponding path program 70 times [2020-12-23 13:06:27,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:27,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008688247] [2020-12-23 13:06:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:27,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008688247] [2020-12-23 13:06:27,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994972452] [2020-12-23 13:06:27,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:27,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:27,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:27,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:27,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:27,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001060567] [2020-12-23 13:06:27,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:27,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:27,346 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:27,877 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-12-23 13:06:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:06:27,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:27,879 INFO L225 Difference]: With dead ends: 112 [2020-12-23 13:06:27,879 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 13:06:27,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 13:06:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 13:06:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-12-23 13:06:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-23 13:06:27,882 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-23 13:06:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:27,882 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-23 13:06:27,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-23 13:06:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:27,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:27,883 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:28,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:28,084 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 382967990, now seen corresponding path program 71 times [2020-12-23 13:06:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:28,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409370006] [2020-12-23 13:06:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:28,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409370006] [2020-12-23 13:06:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513299590] [2020-12-23 13:06:28,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:28,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 13:06:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:06:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:28,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:28,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-23 13:06:28,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060552032] [2020-12-23 13:06:28,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:06:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:06:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:06:28,328 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-23 13:06:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:28,899 INFO L93 Difference]: Finished difference Result 129 states and 307 transitions. [2020-12-23 13:06:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:06:28,899 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 13:06:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:28,904 INFO L225 Difference]: With dead ends: 129 [2020-12-23 13:06:28,904 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 13:06:28,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 13:06:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 13:06:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2020-12-23 13:06:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 13:06:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 213 transitions. [2020-12-23 13:06:28,911 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 213 transitions. Word has length 22 [2020-12-23 13:06:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:28,911 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 213 transitions. [2020-12-23 13:06:28,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:06:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 213 transitions. [2020-12-23 13:06:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 13:06:28,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:28,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:29,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-23 13:06:29,124 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash 382990310, now seen corresponding path program 72 times [2020-12-23 13:06:29,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:29,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697247376] [2020-12-23 13:06:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:29,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697247376] [2020-12-23 13:06:29,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763405175] [2020-12-23 13:06:29,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:29,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 13:06:29,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:29,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:29,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 13:06:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705844122] [2020-12-23 13:06:29,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:06:29,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:06:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:06:29,374 INFO L87 Difference]: Start difference. First operand 83 states and 213 transitions. Second operand 19 states. [2020-12-23 13:06:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:30,122 INFO L93 Difference]: Finished difference Result 113 states and 273 transitions. [2020-12-23 13:06:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:06:30,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 13:06:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:30,124 INFO L225 Difference]: With dead ends: 113 [2020-12-23 13:06:30,124 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 13:06:30,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=604, Invalid=1558, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 13:06:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 13:06:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2020-12-23 13:06:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:06:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-12-23 13:06:30,127 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 22 [2020-12-23 13:06:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:30,127 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-12-23 13:06:30,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:06:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-12-23 13:06:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:30,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:30,128 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:30,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:30,329 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 860606391, now seen corresponding path program 73 times [2020-12-23 13:06:30,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:30,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027681383] [2020-12-23 13:06:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027681383] [2020-12-23 13:06:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587841122] [2020-12-23 13:06:30,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:30,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:30,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:30,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745614732] [2020-12-23 13:06:30,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:30,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:30,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:30,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:30,629 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-12-23 13:06:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:31,081 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-12-23 13:06:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:31,082 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:31,084 INFO L225 Difference]: With dead ends: 107 [2020-12-23 13:06:31,084 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 13:06:31,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:06:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 13:06:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-12-23 13:06:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 13:06:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-12-23 13:06:31,087 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-12-23 13:06:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:31,087 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-12-23 13:06:31,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-12-23 13:06:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:31,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:31,088 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:31,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-23 13:06:31,297 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 285226543, now seen corresponding path program 74 times [2020-12-23 13:06:31,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:31,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071634754] [2020-12-23 13:06:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:31,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071634754] [2020-12-23 13:06:31,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000093735] [2020-12-23 13:06:31,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:31,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:31,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:31,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:31,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654297456] [2020-12-23 13:06:31,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:31,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:31,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:31,575 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-12-23 13:06:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:32,046 INFO L93 Difference]: Finished difference Result 120 states and 273 transitions. [2020-12-23 13:06:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:32,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:32,048 INFO L225 Difference]: With dead ends: 120 [2020-12-23 13:06:32,048 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 13:06:32,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:06:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 13:06:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 69. [2020-12-23 13:06:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 13:06:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-12-23 13:06:32,052 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-12-23 13:06:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:32,052 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-12-23 13:06:32,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-12-23 13:06:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:32,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:32,053 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:32,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:32,262 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1124850343, now seen corresponding path program 75 times [2020-12-23 13:06:32,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:32,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43755771] [2020-12-23 13:06:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:32,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43755771] [2020-12-23 13:06:32,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000474683] [2020-12-23 13:06:32,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:32,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 13:06:32,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:32,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:32,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:32,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:32,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236389992] [2020-12-23 13:06:32,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:32,565 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-12-23 13:06:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:33,083 INFO L93 Difference]: Finished difference Result 118 states and 271 transitions. [2020-12-23 13:06:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:33,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:33,085 INFO L225 Difference]: With dead ends: 118 [2020-12-23 13:06:33,085 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 13:06:33,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1315, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 13:06:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 13:06:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2020-12-23 13:06:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 13:06:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-12-23 13:06:33,089 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-12-23 13:06:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:33,090 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-12-23 13:06:33,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-12-23 13:06:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:33,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:33,090 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:33,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 13:06:33,305 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash -769245921, now seen corresponding path program 76 times [2020-12-23 13:06:33,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:33,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503580089] [2020-12-23 13:06:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:33,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503580089] [2020-12-23 13:06:33,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223262654] [2020-12-23 13:06:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:33,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:33,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:33,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978549519] [2020-12-23 13:06:33,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:33,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:33,578 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-12-23 13:06:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:34,120 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2020-12-23 13:06:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:06:34,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:34,122 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:06:34,122 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 13:06:34,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1434, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 13:06:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 13:06:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2020-12-23 13:06:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:06:34,125 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-12-23 13:06:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:34,125 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:06:34,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:06:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:34,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:34,126 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:34,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:34,327 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:34,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1897472617, now seen corresponding path program 77 times [2020-12-23 13:06:34,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:34,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633831364] [2020-12-23 13:06:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633831364] [2020-12-23 13:06:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040814033] [2020-12-23 13:06:34,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:34,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 13:06:34,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:34,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:34,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:34,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526782192] [2020-12-23 13:06:34,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:34,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:34,596 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-12-23 13:06:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:35,177 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-12-23 13:06:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:06:35,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:35,179 INFO L225 Difference]: With dead ends: 114 [2020-12-23 13:06:35,179 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 13:06:35,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 13:06:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 13:06:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-12-23 13:06:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 13:06:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-12-23 13:06:35,183 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-12-23 13:06:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:35,183 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-12-23 13:06:35,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-12-23 13:06:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:35,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:35,184 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:35,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 13:06:35,385 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1983562737, now seen corresponding path program 78 times [2020-12-23 13:06:35,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:35,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419899938] [2020-12-23 13:06:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:35,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419899938] [2020-12-23 13:06:35,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479901144] [2020-12-23 13:06:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:35,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 13:06:35,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:35,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:35,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:35,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253997841] [2020-12-23 13:06:35,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:35,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:35,670 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-12-23 13:06:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:36,312 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-12-23 13:06:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:06:36,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:36,313 INFO L225 Difference]: With dead ends: 112 [2020-12-23 13:06:36,314 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 13:06:36,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=704, Invalid=1648, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 13:06:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 13:06:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2020-12-23 13:06:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 13:06:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-12-23 13:06:36,318 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-12-23 13:06:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:36,318 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-12-23 13:06:36,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-12-23 13:06:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:36,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:36,319 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:36,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:36,530 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1961305977, now seen corresponding path program 79 times [2020-12-23 13:06:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:36,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464073384] [2020-12-23 13:06:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:36,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464073384] [2020-12-23 13:06:36,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395537787] [2020-12-23 13:06:36,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:06:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:36,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:36,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:06:36,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284240821] [2020-12-23 13:06:36,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:06:36,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:36,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:06:36,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:06:36,784 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-12-23 13:06:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:37,473 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-12-23 13:06:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:06:37,483 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 13:06:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:37,484 INFO L225 Difference]: With dead ends: 129 [2020-12-23 13:06:37,484 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 13:06:37,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 13:06:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 13:06:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 82. [2020-12-23 13:06:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 13:06:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-12-23 13:06:37,487 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-12-23 13:06:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:37,488 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-12-23 13:06:37,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:06:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-12-23 13:06:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 13:06:37,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:37,488 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:37,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:37,702 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1961283657, now seen corresponding path program 80 times [2020-12-23 13:06:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:37,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710860787] [2020-12-23 13:06:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:37,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710860787] [2020-12-23 13:06:37,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309457115] [2020-12-23 13:06:37,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:37,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:37,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:37,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:37,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-23 13:06:37,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372711392] [2020-12-23 13:06:37,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:37,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:37,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:37,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:37,967 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 21 states. [2020-12-23 13:06:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:38,952 INFO L93 Difference]: Finished difference Result 124 states and 298 transitions. [2020-12-23 13:06:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 13:06:38,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-23 13:06:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:38,953 INFO L225 Difference]: With dead ends: 124 [2020-12-23 13:06:38,954 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 13:06:38,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=793, Invalid=2069, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 13:06:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 13:06:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2020-12-23 13:06:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 13:06:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 207 transitions. [2020-12-23 13:06:38,957 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 207 transitions. Word has length 23 [2020-12-23 13:06:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:38,957 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 207 transitions. [2020-12-23 13:06:38,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 207 transitions. [2020-12-23 13:06:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:38,958 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:39,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:39,163 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1702981252, now seen corresponding path program 81 times [2020-12-23 13:06:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541540231] [2020-12-23 13:06:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:39,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541540231] [2020-12-23 13:06:39,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097259191] [2020-12-23 13:06:39,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:39,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 13:06:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:39,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:39,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 13:06:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62243212] [2020-12-23 13:06:39,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:39,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:39,553 INFO L87 Difference]: Start difference. First operand 81 states and 207 transitions. Second operand 22 states. [2020-12-23 13:06:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:39,984 INFO L93 Difference]: Finished difference Result 106 states and 257 transitions. [2020-12-23 13:06:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:06:39,985 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-23 13:06:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:39,986 INFO L225 Difference]: With dead ends: 106 [2020-12-23 13:06:39,986 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 13:06:39,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=1071, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:06:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 13:06:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2020-12-23 13:06:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:39,989 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:39,989 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:39,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:39,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:39,989 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:40,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:40,191 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash 398488074, now seen corresponding path program 82 times [2020-12-23 13:06:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:40,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672566689] [2020-12-23 13:06:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:40,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672566689] [2020-12-23 13:06:40,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649779262] [2020-12-23 13:06:40,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:40,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:40,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:40,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:40,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:40,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096373896] [2020-12-23 13:06:40,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:40,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:40,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:40,548 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:40,953 INFO L93 Difference]: Finished difference Result 147 states and 339 transitions. [2020-12-23 13:06:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:06:40,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:40,955 INFO L225 Difference]: With dead ends: 147 [2020-12-23 13:06:40,955 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 13:06:40,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=431, Invalid=975, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:06:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 13:06:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2020-12-23 13:06:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:40,958 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:40,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:40,958 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:40,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:40,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:40,959 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:41,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:41,161 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1509235330, now seen corresponding path program 83 times [2020-12-23 13:06:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433566161] [2020-12-23 13:06:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:41,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433566161] [2020-12-23 13:06:41,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952010723] [2020-12-23 13:06:41,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:41,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 13:06:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:41,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:41,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352889233] [2020-12-23 13:06:41,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:41,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:41,520 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:41,989 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-12-23 13:06:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:06:41,990 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:41,991 INFO L225 Difference]: With dead ends: 140 [2020-12-23 13:06:41,991 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 13:06:41,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:06:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 13:06:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2020-12-23 13:06:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:41,994 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:41,995 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:41,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:41,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:41,995 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:42,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:42,197 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 933855482, now seen corresponding path program 84 times [2020-12-23 13:06:42,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:42,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108914862] [2020-12-23 13:06:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:42,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108914862] [2020-12-23 13:06:42,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747112608] [2020-12-23 13:06:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:42,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 13:06:42,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:42,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:42,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:42,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:42,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550288126] [2020-12-23 13:06:42,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:42,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:42,498 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:42,995 INFO L93 Difference]: Finished difference Result 136 states and 317 transitions. [2020-12-23 13:06:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:42,996 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:42,997 INFO L225 Difference]: With dead ends: 136 [2020-12-23 13:06:42,997 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 13:06:42,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:06:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 13:06:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2020-12-23 13:06:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:43,000 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:43,000 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:43,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:43,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:43,001 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:43,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:43,217 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1773479282, now seen corresponding path program 85 times [2020-12-23 13:06:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696059886] [2020-12-23 13:06:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:43,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696059886] [2020-12-23 13:06:43,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62509601] [2020-12-23 13:06:43,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:43,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:43,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647065933] [2020-12-23 13:06:43,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:43,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:43,521 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:44,077 INFO L93 Difference]: Finished difference Result 132 states and 309 transitions. [2020-12-23 13:06:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:44,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:44,079 INFO L225 Difference]: With dead ends: 132 [2020-12-23 13:06:44,079 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 13:06:44,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:06:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 13:06:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2020-12-23 13:06:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:44,085 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:44,086 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:44,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:44,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:44,086 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:44,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-23 13:06:44,300 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:44,300 INFO L82 PathProgramCache]: Analyzing trace with hash -120616982, now seen corresponding path program 86 times [2020-12-23 13:06:44,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:44,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730917812] [2020-12-23 13:06:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730917812] [2020-12-23 13:06:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416388045] [2020-12-23 13:06:44,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:44,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:44,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:44,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:44,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:44,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691563074] [2020-12-23 13:06:44,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:44,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:44,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:44,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:44,579 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:45,188 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-12-23 13:06:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:06:45,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:45,190 INFO L225 Difference]: With dead ends: 128 [2020-12-23 13:06:45,190 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 13:06:45,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 13:06:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 13:06:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 85. [2020-12-23 13:06:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:45,195 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:45,195 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:45,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:45,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:45,196 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:45,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:45,412 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1248843678, now seen corresponding path program 87 times [2020-12-23 13:06:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:45,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590028591] [2020-12-23 13:06:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:45,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590028591] [2020-12-23 13:06:45,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193713757] [2020-12-23 13:06:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:45,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 13:06:45,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:45,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:45,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:45,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002835893] [2020-12-23 13:06:45,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:45,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:45,688 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:46,350 INFO L93 Difference]: Finished difference Result 124 states and 293 transitions. [2020-12-23 13:06:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:06:46,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:46,351 INFO L225 Difference]: With dead ends: 124 [2020-12-23 13:06:46,351 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 13:06:46,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=1625, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 13:06:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 13:06:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 85. [2020-12-23 13:06:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:46,354 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:46,355 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:46,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:46,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:46,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:46,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-23 13:06:46,570 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1334933798, now seen corresponding path program 88 times [2020-12-23 13:06:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:46,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137379109] [2020-12-23 13:06:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:46,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137379109] [2020-12-23 13:06:46,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061500984] [2020-12-23 13:06:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:46,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:46,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:46,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:46,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334757786] [2020-12-23 13:06:46,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:46,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:46,855 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:47,559 INFO L93 Difference]: Finished difference Result 120 states and 285 transitions. [2020-12-23 13:06:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:06:47,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:47,561 INFO L225 Difference]: With dead ends: 120 [2020-12-23 13:06:47,561 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 13:06:47,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=1731, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 13:06:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 13:06:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2020-12-23 13:06:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-23 13:06:47,565 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-23 13:06:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:47,565 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-23 13:06:47,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-23 13:06:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:47,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:47,566 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:47,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:47,780 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1312677038, now seen corresponding path program 89 times [2020-12-23 13:06:47,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:47,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451016600] [2020-12-23 13:06:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:47,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451016600] [2020-12-23 13:06:47,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142083581] [2020-12-23 13:06:47,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:48,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 13:06:48,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:48,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:48,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:06:48,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886395425] [2020-12-23 13:06:48,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:06:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:06:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:06:48,080 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-23 13:06:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:48,934 INFO L93 Difference]: Finished difference Result 137 states and 327 transitions. [2020-12-23 13:06:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:06:48,935 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 13:06:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:48,936 INFO L225 Difference]: With dead ends: 137 [2020-12-23 13:06:48,936 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 13:06:48,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=823, Invalid=1829, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 13:06:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 13:06:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-12-23 13:06:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 13:06:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 229 transitions. [2020-12-23 13:06:48,940 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 229 transitions. Word has length 24 [2020-12-23 13:06:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:48,940 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 229 transitions. [2020-12-23 13:06:48,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:06:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 229 transitions. [2020-12-23 13:06:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 13:06:48,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:48,941 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:49,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:49,151 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1312654718, now seen corresponding path program 90 times [2020-12-23 13:06:49,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:49,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021323286] [2020-12-23 13:06:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:49,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021323286] [2020-12-23 13:06:49,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606983337] [2020-12-23 13:06:49,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:49,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 13:06:49,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:49,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:49,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 13:06:49,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594580735] [2020-12-23 13:06:49,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:49,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:49,454 INFO L87 Difference]: Start difference. First operand 89 states and 229 transitions. Second operand 22 states. [2020-12-23 13:06:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:50,398 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-12-23 13:06:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 13:06:50,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-23 13:06:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:50,400 INFO L225 Difference]: With dead ends: 133 [2020-12-23 13:06:50,400 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 13:06:50,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=806, Invalid=2164, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 13:06:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 13:06:50,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-12-23 13:06:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 13:06:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 176 transitions. [2020-12-23 13:06:50,403 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 176 transitions. Word has length 24 [2020-12-23 13:06:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:50,403 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 176 transitions. [2020-12-23 13:06:50,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 176 transitions. [2020-12-23 13:06:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:50,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:50,404 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:50,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:50,604 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1885931109, now seen corresponding path program 91 times [2020-12-23 13:06:50,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:50,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957713619] [2020-12-23 13:06:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:50,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957713619] [2020-12-23 13:06:50,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284618370] [2020-12-23 13:06:50,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:50,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:50,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:50,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:50,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:50,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924715659] [2020-12-23 13:06:50,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:50,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:50,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:50,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:50,937 INFO L87 Difference]: Start difference. First operand 72 states and 176 transitions. Second operand 22 states. [2020-12-23 13:06:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:51,472 INFO L93 Difference]: Finished difference Result 117 states and 267 transitions. [2020-12-23 13:06:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:06:51,473 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:51,474 INFO L225 Difference]: With dead ends: 117 [2020-12-23 13:06:51,474 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 13:06:51,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=493, Invalid=1229, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:06:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 13:06:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2020-12-23 13:06:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:06:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 179 transitions. [2020-12-23 13:06:51,477 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 179 transitions. Word has length 25 [2020-12-23 13:06:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:51,477 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 179 transitions. [2020-12-23 13:06:51,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 179 transitions. [2020-12-23 13:06:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:51,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:51,477 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:51,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:51,684 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -775183853, now seen corresponding path program 92 times [2020-12-23 13:06:51,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:51,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101118758] [2020-12-23 13:06:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101118758] [2020-12-23 13:06:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197796496] [2020-12-23 13:06:51,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:52,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:52,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127531223] [2020-12-23 13:06:52,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:52,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:52,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:52,044 INFO L87 Difference]: Start difference. First operand 73 states and 179 transitions. Second operand 22 states. [2020-12-23 13:06:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:52,614 INFO L93 Difference]: Finished difference Result 132 states and 299 transitions. [2020-12-23 13:06:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:06:52,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:52,616 INFO L225 Difference]: With dead ends: 132 [2020-12-23 13:06:52,616 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 13:06:52,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 13:06:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 13:06:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2020-12-23 13:06:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 13:06:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-12-23 13:06:52,619 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 25 [2020-12-23 13:06:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:52,619 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-12-23 13:06:52,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-12-23 13:06:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:52,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:52,620 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:52,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:52,821 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1350563701, now seen corresponding path program 93 times [2020-12-23 13:06:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:52,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559142888] [2020-12-23 13:06:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:53,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559142888] [2020-12-23 13:06:53,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971534362] [2020-12-23 13:06:53,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:53,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 13:06:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:53,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:53,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357518214] [2020-12-23 13:06:53,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:53,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:53,203 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 22 states. [2020-12-23 13:06:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:53,769 INFO L93 Difference]: Finished difference Result 130 states and 297 transitions. [2020-12-23 13:06:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:06:53,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:53,771 INFO L225 Difference]: With dead ends: 130 [2020-12-23 13:06:53,771 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 13:06:53,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=1580, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 13:06:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 13:06:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2020-12-23 13:06:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 13:06:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-12-23 13:06:53,774 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 25 [2020-12-23 13:06:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:53,774 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-12-23 13:06:53,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-12-23 13:06:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:53,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:53,775 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:53,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:53,989 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash -510939901, now seen corresponding path program 94 times [2020-12-23 13:06:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:53,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259868532] [2020-12-23 13:06:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:54,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259868532] [2020-12-23 13:06:54,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811280615] [2020-12-23 13:06:54,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:54,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:06:54,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:54,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:54,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:54,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:54,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923801009] [2020-12-23 13:06:54,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:54,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:54,322 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 22 states. [2020-12-23 13:06:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:54,957 INFO L93 Difference]: Finished difference Result 128 states and 295 transitions. [2020-12-23 13:06:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:06:54,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:54,959 INFO L225 Difference]: With dead ends: 128 [2020-12-23 13:06:54,959 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 13:06:54,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=635, Invalid=1717, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 13:06:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 13:06:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2020-12-23 13:06:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:06:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-12-23 13:06:54,963 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 25 [2020-12-23 13:06:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:54,963 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-12-23 13:06:54,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-12-23 13:06:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:54,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:54,964 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:55,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-12-23 13:06:55,165 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1889931131, now seen corresponding path program 95 times [2020-12-23 13:06:55,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:55,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983141352] [2020-12-23 13:06:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:55,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983141352] [2020-12-23 13:06:55,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028180698] [2020-12-23 13:06:55,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:55,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 13:06:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:55,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:55,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393810355] [2020-12-23 13:06:55,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:55,489 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 22 states. [2020-12-23 13:06:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:56,181 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-12-23 13:06:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:06:56,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:56,183 INFO L225 Difference]: With dead ends: 126 [2020-12-23 13:06:56,183 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 13:06:56,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=704, Invalid=1846, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 13:06:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 13:06:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2020-12-23 13:06:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 13:06:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-12-23 13:06:56,186 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 25 [2020-12-23 13:06:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:56,186 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-12-23 13:06:56,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-12-23 13:06:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:56,187 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:56,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:56,388 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash 761704435, now seen corresponding path program 96 times [2020-12-23 13:06:56,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:56,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696610096] [2020-12-23 13:06:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:56,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696610096] [2020-12-23 13:06:56,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830897746] [2020-12-23 13:06:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:56,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 13:06:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:56,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:56,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:56,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:56,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746961556] [2020-12-23 13:06:56,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:56,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:56,703 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 22 states. [2020-12-23 13:06:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:57,454 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-12-23 13:06:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:06:57,455 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:57,456 INFO L225 Difference]: With dead ends: 124 [2020-12-23 13:06:57,456 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 13:06:57,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=789, Invalid=1967, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 13:06:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 13:06:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2020-12-23 13:06:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 13:06:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-12-23 13:06:57,459 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 25 [2020-12-23 13:06:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:57,460 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-12-23 13:06:57,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-12-23 13:06:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:57,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:57,460 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-12-23 13:06:57,676 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 675614315, now seen corresponding path program 97 times [2020-12-23 13:06:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:57,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531113372] [2020-12-23 13:06:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:57,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531113372] [2020-12-23 13:06:57,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502235159] [2020-12-23 13:06:57,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:06:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:06:57,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:57,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:06:57,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636436435] [2020-12-23 13:06:57,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:57,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:57,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:57,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:57,980 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 22 states. [2020-12-23 13:06:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:06:58,782 INFO L93 Difference]: Finished difference Result 123 states and 291 transitions. [2020-12-23 13:06:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 13:06:58,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:06:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:06:58,784 INFO L225 Difference]: With dead ends: 123 [2020-12-23 13:06:58,784 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 13:06:58,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=890, Invalid=2080, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 13:06:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 13:06:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 85. [2020-12-23 13:06:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 13:06:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-12-23 13:06:58,787 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 25 [2020-12-23 13:06:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:06:58,787 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-12-23 13:06:58,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:06:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-12-23 13:06:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:06:58,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:06:58,788 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:06:59,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:06:59,002 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:06:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:06:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash 697897239, now seen corresponding path program 98 times [2020-12-23 13:06:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:06:59,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621725242] [2020-12-23 13:06:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:06:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:06:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:06:59,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621725242] [2020-12-23 13:06:59,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522390186] [2020-12-23 13:06:59,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:06:59,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:06:59,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:06:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 13:06:59,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:06:59,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:06:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:06:59,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:06:59,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 13:06:59,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834666021] [2020-12-23 13:06:59,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:06:59,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:06:59,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:06:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:06:59,325 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 22 states. [2020-12-23 13:07:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:00,294 INFO L93 Difference]: Finished difference Result 134 states and 324 transitions. [2020-12-23 13:07:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 13:07:00,295 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 13:07:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:00,297 INFO L225 Difference]: With dead ends: 134 [2020-12-23 13:07:00,297 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 13:07:00,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=978, Invalid=2102, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 13:07:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 13:07:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2020-12-23 13:07:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 13:07:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-12-23 13:07:00,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 25 [2020-12-23 13:07:00,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:00,302 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-12-23 13:07:00,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:07:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-12-23 13:07:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:00,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:00,302 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:00,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-12-23 13:07:00,517 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash -182428128, now seen corresponding path program 99 times [2020-12-23 13:07:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:00,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799274871] [2020-12-23 13:07:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:00,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799274871] [2020-12-23 13:07:00,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023830773] [2020-12-23 13:07:00,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:00,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 13:07:00,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:00,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 13:07:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:00,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:00,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 13:07:00,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486192793] [2020-12-23 13:07:00,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 13:07:00,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 13:07:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:07:00,975 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 24 states. [2020-12-23 13:07:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:01,463 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-12-23 13:07:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:07:01,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-23 13:07:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:01,466 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:07:01,466 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 13:07:01,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=592, Invalid=1300, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:07:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 13:07:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2020-12-23 13:07:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:01,469 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:01,469 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:01,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 13:07:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:01,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:01,470 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:01,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-23 13:07:01,672 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:01,672 INFO L82 PathProgramCache]: Analyzing trace with hash 694965038, now seen corresponding path program 100 times [2020-12-23 13:07:01,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:01,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921634457] [2020-12-23 13:07:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:01,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921634457] [2020-12-23 13:07:01,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827139029] [2020-12-23 13:07:01,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:02,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:07:02,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:02,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:02,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:02,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560257261] [2020-12-23 13:07:02,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:02,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:02,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:02,061 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:02,551 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2020-12-23 13:07:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:07:02,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:02,553 INFO L225 Difference]: With dead ends: 161 [2020-12-23 13:07:02,553 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 13:07:02,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:07:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 13:07:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 93. [2020-12-23 13:07:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:02,557 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:02,558 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:02,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:02,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:02,558 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:02,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-23 13:07:02,765 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:02,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1323778650, now seen corresponding path program 101 times [2020-12-23 13:07:02,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:02,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668478635] [2020-12-23 13:07:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:03,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668478635] [2020-12-23 13:07:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350054625] [2020-12-23 13:07:03,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:03,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 13:07:03,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:03,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:03,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:03,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674155376] [2020-12-23 13:07:03,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:03,160 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:03,683 INFO L93 Difference]: Finished difference Result 154 states and 355 transitions. [2020-12-23 13:07:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:07:03,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:03,684 INFO L225 Difference]: With dead ends: 154 [2020-12-23 13:07:03,684 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 13:07:03,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=534, Invalid=1358, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:07:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 13:07:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2020-12-23 13:07:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:03,687 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:03,688 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:03,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:03,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:03,688 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:03,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:03,889 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -213031394, now seen corresponding path program 102 times [2020-12-23 13:07:03,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:03,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698606680] [2020-12-23 13:07:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:04,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698606680] [2020-12-23 13:07:04,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512300811] [2020-12-23 13:07:04,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:04,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 13:07:04,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:04,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:04,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:04,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:04,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107855714] [2020-12-23 13:07:04,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:04,255 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:04,837 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-12-23 13:07:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:07:04,838 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:04,839 INFO L225 Difference]: With dead ends: 150 [2020-12-23 13:07:04,839 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 13:07:04,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 13:07:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 13:07:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2020-12-23 13:07:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:04,842 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:04,842 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:04,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:04,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:04,842 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:05,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2020-12-23 13:07:05,043 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash -788411242, now seen corresponding path program 103 times [2020-12-23 13:07:05,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:05,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532943856] [2020-12-23 13:07:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:05,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532943856] [2020-12-23 13:07:05,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997234315] [2020-12-23 13:07:05,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:05,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:05,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:05,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321578939] [2020-12-23 13:07:05,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:05,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:05,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:05,431 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:06,107 INFO L93 Difference]: Finished difference Result 146 states and 339 transitions. [2020-12-23 13:07:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:07:06,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:06,108 INFO L225 Difference]: With dead ends: 146 [2020-12-23 13:07:06,109 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 13:07:06,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 13:07:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 13:07:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2020-12-23 13:07:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:06,112 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:06,112 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:06,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:06,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:06,112 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:06,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:06,313 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 51212558, now seen corresponding path program 104 times [2020-12-23 13:07:06,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:06,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322668732] [2020-12-23 13:07:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:06,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322668732] [2020-12-23 13:07:06,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174435492] [2020-12-23 13:07:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:06,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:07:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:06,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:06,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:06,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945727856] [2020-12-23 13:07:06,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:06,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:06,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:06,646 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:07,358 INFO L93 Difference]: Finished difference Result 142 states and 331 transitions. [2020-12-23 13:07:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:07:07,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:07,360 INFO L225 Difference]: With dead ends: 142 [2020-12-23 13:07:07,360 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 13:07:07,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=648, Invalid=1802, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 13:07:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 13:07:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2020-12-23 13:07:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:07,363 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:07,363 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:07,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:07,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:07,364 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:07,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-12-23 13:07:07,580 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1842883706, now seen corresponding path program 105 times [2020-12-23 13:07:07,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:07,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605929681] [2020-12-23 13:07:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:07,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605929681] [2020-12-23 13:07:07,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996101684] [2020-12-23 13:07:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:07,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 13:07:07,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:07,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:07,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:07,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857927984] [2020-12-23 13:07:07,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:07,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:07,915 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:08,697 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-12-23 13:07:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:07:08,698 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:08,698 INFO L225 Difference]: With dead ends: 138 [2020-12-23 13:07:08,699 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 13:07:08,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 13:07:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 13:07:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-12-23 13:07:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:08,702 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:08,702 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:08,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:08,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:08,703 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:08,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:08,916 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1323856894, now seen corresponding path program 106 times [2020-12-23 13:07:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:08,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526574307] [2020-12-23 13:07:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:09,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526574307] [2020-12-23 13:07:09,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191919196] [2020-12-23 13:07:09,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:09,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:07:09,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:09,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:09,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:09,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789426589] [2020-12-23 13:07:09,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:09,252 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:10,114 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-12-23 13:07:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:07:10,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:10,115 INFO L225 Difference]: With dead ends: 134 [2020-12-23 13:07:10,116 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 13:07:10,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=2058, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 13:07:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 13:07:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-12-23 13:07:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:10,121 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:10,121 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:10,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:10,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:10,122 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:10,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:10,334 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1237766774, now seen corresponding path program 107 times [2020-12-23 13:07:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:10,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204463620] [2020-12-23 13:07:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204463620] [2020-12-23 13:07:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773837520] [2020-12-23 13:07:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:10,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 13:07:10,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:10,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:10,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:07:10,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143985760] [2020-12-23 13:07:10,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:10,675 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:11,621 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-12-23 13:07:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 13:07:11,622 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:11,622 INFO L225 Difference]: With dead ends: 128 [2020-12-23 13:07:11,622 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 13:07:11,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=2174, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 13:07:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 13:07:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-12-23 13:07:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 13:07:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-23 13:07:11,625 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-23 13:07:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:11,626 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-23 13:07:11,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-23 13:07:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:11,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:11,626 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:11,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2020-12-23 13:07:11,837 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1260049698, now seen corresponding path program 108 times [2020-12-23 13:07:11,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:11,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777700328] [2020-12-23 13:07:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:07:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777700328] [2020-12-23 13:07:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124131884] [2020-12-23 13:07:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:12,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 13:07:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 13:07:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:07:12,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:12,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-23 13:07:12,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496160352] [2020-12-23 13:07:12,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:07:12,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:07:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:07:12,174 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-23 13:07:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:13,255 INFO L93 Difference]: Finished difference Result 144 states and 345 transitions. [2020-12-23 13:07:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 13:07:13,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 13:07:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:13,260 INFO L225 Difference]: With dead ends: 144 [2020-12-23 13:07:13,260 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 13:07:13,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2464, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 13:07:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 13:07:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-12-23 13:07:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 13:07:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-12-23 13:07:13,265 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 26 [2020-12-23 13:07:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:13,265 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-12-23 13:07:13,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:07:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-12-23 13:07:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:13,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:13,265 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:13,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:13,466 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash 159167202, now seen corresponding path program 109 times [2020-12-23 13:07:13,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:13,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107016853] [2020-12-23 13:07:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:07:13,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107016853] [2020-12-23 13:07:13,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71548791] [2020-12-23 13:07:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:13,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 13:07:13,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:07:13,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:13,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:07:13,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926054104] [2020-12-23 13:07:13,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:07:13,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:07:13,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:07:13,750 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 22 states. [2020-12-23 13:07:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:14,675 INFO L93 Difference]: Finished difference Result 169 states and 397 transitions. [2020-12-23 13:07:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 13:07:14,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-23 13:07:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:14,676 INFO L225 Difference]: With dead ends: 169 [2020-12-23 13:07:14,676 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 13:07:14,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1007, Invalid=2185, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 13:07:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 13:07:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2020-12-23 13:07:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 13:07:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2020-12-23 13:07:14,680 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 26 [2020-12-23 13:07:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:14,680 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2020-12-23 13:07:14,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:07:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2020-12-23 13:07:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 13:07:14,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:14,680 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:14,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:14,881 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 159885286, now seen corresponding path program 110 times [2020-12-23 13:07:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:14,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747226615] [2020-12-23 13:07:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747226615] [2020-12-23 13:07:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107702116] [2020-12-23 13:07:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:15,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:07:15,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 13:07:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:15,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:07:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:15,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:15,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 13:07:15,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168119607] [2020-12-23 13:07:15,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 13:07:15,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 13:07:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:07:15,221 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand 24 states. [2020-12-23 13:07:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:16,376 INFO L93 Difference]: Finished difference Result 169 states and 399 transitions. [2020-12-23 13:07:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 13:07:16,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-23 13:07:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:16,378 INFO L225 Difference]: With dead ends: 169 [2020-12-23 13:07:16,378 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 13:07:16,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1197, Invalid=2585, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 13:07:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 13:07:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2020-12-23 13:07:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 13:07:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 265 transitions. [2020-12-23 13:07:16,381 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 265 transitions. Word has length 26 [2020-12-23 13:07:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:16,382 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 265 transitions. [2020-12-23 13:07:16,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 13:07:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 265 transitions. [2020-12-23 13:07:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 13:07:16,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:16,382 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:16,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-12-23 13:07:16,583 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash 406024247, now seen corresponding path program 111 times [2020-12-23 13:07:16,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:16,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301750893] [2020-12-23 13:07:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:07:16,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301750893] [2020-12-23 13:07:16,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919850452] [2020-12-23 13:07:16,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:16,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 13:07:16,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:16,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 13:07:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:07:16,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:16,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-23 13:07:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774667161] [2020-12-23 13:07:16,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:07:16,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:07:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:07:16,910 INFO L87 Difference]: Start difference. First operand 108 states and 265 transitions. Second operand 22 states. [2020-12-23 13:07:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:17,823 INFO L93 Difference]: Finished difference Result 172 states and 405 transitions. [2020-12-23 13:07:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 13:07:17,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-23 13:07:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:17,825 INFO L225 Difference]: With dead ends: 172 [2020-12-23 13:07:17,825 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 13:07:17,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 13:07:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 13:07:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2020-12-23 13:07:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 13:07:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 289 transitions. [2020-12-23 13:07:17,828 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 289 transitions. Word has length 27 [2020-12-23 13:07:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:17,828 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 289 transitions. [2020-12-23 13:07:17,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:07:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 289 transitions. [2020-12-23 13:07:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 13:07:17,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:17,829 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:18,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-23 13:07:18,034 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:18,034 INFO L82 PathProgramCache]: Analyzing trace with hash 406742331, now seen corresponding path program 112 times [2020-12-23 13:07:18,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:18,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138257255] [2020-12-23 13:07:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:18,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138257255] [2020-12-23 13:07:18,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521808570] [2020-12-23 13:07:18,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:18,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:07:18,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 13:07:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:18,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:07:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:18,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:18,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-23 13:07:18,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537348726] [2020-12-23 13:07:18,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 13:07:18,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 13:07:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:07:18,406 INFO L87 Difference]: Start difference. First operand 115 states and 289 transitions. Second operand 25 states. [2020-12-23 13:07:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:19,716 INFO L93 Difference]: Finished difference Result 167 states and 396 transitions. [2020-12-23 13:07:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 13:07:19,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-23 13:07:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:19,718 INFO L225 Difference]: With dead ends: 167 [2020-12-23 13:07:19,718 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 13:07:19,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1215, Invalid=2691, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 13:07:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 13:07:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2020-12-23 13:07:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 13:07:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 234 transitions. [2020-12-23 13:07:19,721 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 234 transitions. Word has length 27 [2020-12-23 13:07:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:19,722 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 234 transitions. [2020-12-23 13:07:19,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 13:07:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 234 transitions. [2020-12-23 13:07:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 13:07:19,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:19,722 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:19,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-23 13:07:19,929 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:19,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1305995578, now seen corresponding path program 113 times [2020-12-23 13:07:19,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:19,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645029787] [2020-12-23 13:07:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:20,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645029787] [2020-12-23 13:07:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938960387] [2020-12-23 13:07:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:20,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 13:07:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:07:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:20,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 13:07:20,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-12-23 13:07:20,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466653962] [2020-12-23 13:07:20,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:07:20,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:07:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:07:20,167 INFO L87 Difference]: Start difference. First operand 99 states and 234 transitions. Second operand 13 states. [2020-12-23 13:07:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:20,190 INFO L93 Difference]: Finished difference Result 416 states and 914 transitions. [2020-12-23 13:07:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:07:20,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-23 13:07:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:20,192 INFO L225 Difference]: With dead ends: 416 [2020-12-23 13:07:20,192 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 13:07:20,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:07:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 13:07:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-23 13:07:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 13:07:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 75 transitions. [2020-12-23 13:07:20,193 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 75 transitions. Word has length 28 [2020-12-23 13:07:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:20,194 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 75 transitions. [2020-12-23 13:07:20,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:07:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 75 transitions. [2020-12-23 13:07:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 13:07:20,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:20,194 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:20,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:07:20,407 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash -968333302, now seen corresponding path program 114 times [2020-12-23 13:07:20,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:20,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719212184] [2020-12-23 13:07:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:20,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719212184] [2020-12-23 13:07:20,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227952622] [2020-12-23 13:07:20,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:20,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 13:07:20,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:07:20,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 13:07:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:20,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:07:20,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 13:07:20,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370099671] [2020-12-23 13:07:20,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 13:07:20,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 13:07:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:07:20,826 INFO L87 Difference]: Start difference. First operand 43 states and 75 transitions. Second operand 26 states. [2020-12-23 13:07:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:21,414 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2020-12-23 13:07:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:07:21,415 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 13:07:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:21,415 INFO L225 Difference]: With dead ends: 75 [2020-12-23 13:07:21,416 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 13:07:21,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=583, Invalid=1579, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 13:07:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 13:07:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 13:07:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:07:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-12-23 13:07:21,417 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 28 [2020-12-23 13:07:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:21,418 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-12-23 13:07:21,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 13:07:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-12-23 13:07:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 13:07:21,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:07:21,418 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:07:21,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-12-23 13:07:21,619 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:07:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:07:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash 38085663, now seen corresponding path program 115 times [2020-12-23 13:07:21,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:07:21,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018377120] [2020-12-23 13:07:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:07:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:21,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018377120] [2020-12-23 13:07:21,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096900692] [2020-12-23 13:07:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:07:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:07:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:07:21,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:07:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:07:21,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 13:07:21,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-12-23 13:07:21,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546961543] [2020-12-23 13:07:21,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:07:21,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:07:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:07:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:07:21,839 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-12-23 13:07:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:07:21,868 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-12-23 13:07:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:07:21,869 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-23 13:07:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:07:21,869 INFO L225 Difference]: With dead ends: 151 [2020-12-23 13:07:21,869 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 13:07:21,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:07:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 13:07:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 13:07:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 13:07:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 13:07:21,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-12-23 13:07:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:07:21,870 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 13:07:21,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:07:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 13:07:21,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 13:07:22,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-23 13:07:22,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:07:22 BasicIcfg [2020-12-23 13:07:22,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 13:07:22,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 13:07:22,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 13:07:22,091 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 13:07:22,094 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:05:30" (3/4) ... [2020-12-23 13:07:22,098 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 13:07:22,107 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-12-23 13:07:22,107 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-12-23 13:07:22,114 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-23 13:07:22,114 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 13:07:22,115 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 13:07:22,115 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 13:07:22,161 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-longer-1.i-witness.graphml [2020-12-23 13:07:22,161 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 13:07:22,162 INFO L168 Benchmark]: Toolchain (without parser) took 112624.64 ms. Allocated memory was 152.0 MB in the beginning and 352.3 MB in the end (delta: 200.3 MB). Free memory was 126.7 MB in the beginning and 327.3 MB in the end (delta: -200.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 13:07:22,163 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 13:07:22,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.06 ms. Allocated memory is still 152.0 MB. Free memory was 126.4 MB in the beginning and 129.9 MB in the end (delta: -3.5 MB). Peak memory consumption was 27.9 MB. Max. memory is 8.0 GB. [2020-12-23 13:07:22,164 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.95 ms. Allocated memory is still 152.0 MB. Free memory was 129.5 MB in the beginning and 127.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 13:07:22,165 INFO L168 Benchmark]: Boogie Preprocessor took 30.26 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 126.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 13:07:22,165 INFO L168 Benchmark]: RCFGBuilder took 578.69 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 105.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 13:07:22,165 INFO L168 Benchmark]: TraceAbstraction took 111172.65 ms. Allocated memory was 152.0 MB in the beginning and 352.3 MB in the end (delta: 200.3 MB). Free memory was 105.4 MB in the beginning and 329.4 MB in the end (delta: -224.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 13:07:22,166 INFO L168 Benchmark]: Witness Printer took 70.83 ms. Allocated memory is still 352.3 MB. Free memory was 329.4 MB in the beginning and 327.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 13:07:22,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 685.06 ms. Allocated memory is still 152.0 MB. Free memory was 126.4 MB in the beginning and 129.9 MB in the end (delta: -3.5 MB). Peak memory consumption was 27.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 78.95 ms. Allocated memory is still 152.0 MB. Free memory was 129.5 MB in the beginning and 127.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.26 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 126.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.69 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 105.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 111172.65 ms. Allocated memory was 152.0 MB in the beginning and 352.3 MB in the end (delta: 200.3 MB). Free memory was 105.4 MB in the beginning and 329.4 MB in the end (delta: -224.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 70.83 ms. Allocated memory is still 352.3 MB. Free memory was 329.4 MB in the beginning and 327.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.8s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 111.0s, OverallIterations: 118, TraceHistogramMax: 11, AutomataDifference: 52.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 1771 SDtfs, 6303 SDslu, 10215 SDs, 0 SdLazy, 11420 SolverSat, 7040 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5985 GetRequests, 2088 SyntacticMatches, 0 SemanticMatches, 3897 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35672 ImplicationChecksByTransitivity, 50.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 118 MinimizatonAttempts, 3547 StatesRemovedByMinimization, 115 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 20.8s InterpolantComputationTime, 4618 NumberOfCodeBlocks, 4618 NumberOfCodeBlocksAsserted, 568 NumberOfCheckSat, 4388 ConstructedInterpolants, 0 QuantifiedInterpolants, 391868 SizeOfPredicates, 1359 NumberOfNonLiveVariables, 15895 ConjunctsInSsa, 2062 ConjunctsInUnsatCore, 230 InterpolantComputations, 8 PerfectInterpolantSequences, 376/8420 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...