/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/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 13:00:10,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 13:00:10,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 13:00:10,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 13:00:10,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 13:00:10,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 13:00:10,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 13:00:10,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 13:00:10,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 13:00:10,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 13:00:10,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 13:00:10,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 13:00:10,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 13:00:10,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 13:00:10,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 13:00:10,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 13:00:10,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 13:00:10,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 13:00:10,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 13:00:10,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 13:00:10,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 13:00:10,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 13:00:10,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 13:00:10,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 13:00:10,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 13:00:10,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 13:00:10,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 13:00:10,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 13:00:10,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 13:00:10,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 13:00:10,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 13:00:10,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 13:00:10,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 13:00:10,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 13:00:10,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 13:00:10,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 13:00:10,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 13:00:10,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 13:00:10,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 13:00:10,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 13:00:10,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 13:00:10,591 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 13:00:10,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 13:00:10,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 13:00:10,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 13:00:10,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 13:00:10,649 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 13:00:10,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 13:00:10,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 13:00:10,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 13:00:10,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 13:00:10,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 13:00:10,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 13:00:10,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 13:00:10,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 13:00:10,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 13:00:10,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 13:00:10,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 13:00:10,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 13:00:10,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:00:10,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 13:00:10,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 13:00:10,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 13:00:10,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 13:00:10,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 13:00:10,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 13:00:10,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 13:00:10,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 13:00:11,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 13:00:11,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 13:00:11,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 13:00:11,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 13:00:11,096 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 13:00:11,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench-2.i [2020-12-23 13:00:11,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5ac79229e/cb831469c9404b0fb7b725c971d9af59/FLAG19ad7b6a0 [2020-12-23 13:00:11,951 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 13:00:11,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench-2.i [2020-12-23 13:00:11,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5ac79229e/cb831469c9404b0fb7b725c971d9af59/FLAG19ad7b6a0 [2020-12-23 13:00:12,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5ac79229e/cb831469c9404b0fb7b725c971d9af59 [2020-12-23 13:00:12,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 13:00:12,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 13:00:12,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 13:00:12,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 13:00:12,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 13:00:12,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:12,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44592033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12, skipping insertion in model container [2020-12-23 13:00:12,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:12,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 13:00:12,311 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2020-12-23 13:00:12,669 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/fib_bench-2.i[30922,30935] [2020-12-23 13:00:12,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:00:12,688 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2020-12-23 13:00:12,783 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/fib_bench-2.i[30922,30935] [2020-12-23 13:00:12,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:00:12,944 INFO L208 MainTranslator]: Completed translation [2020-12-23 13:00:12,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12 WrapperNode [2020-12-23 13:00:12,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 13:00:12,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 13:00:12,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 13:00:12,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 13:00:12,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:12,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:12,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 13:00:13,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 13:00:13,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 13:00:13,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 13:00:13,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (1/1) ... [2020-12-23 13:00:13,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 13:00:13,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 13:00:13,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 13:00:13,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 13:00:13,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (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 13:00:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-23 13:00:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-23 13:00:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-23 13:00:13,135 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-23 13:00:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 13:00:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-23 13:00:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 13:00:13,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 13:00:13,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 13:00:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-23 13:00:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 13:00:13,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 13:00:13,140 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 13:00:13,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 13:00:13,481 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 13:00:13,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:00:13 BoogieIcfgContainer [2020-12-23 13:00:13,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 13:00:13,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 13:00:13,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 13:00:13,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 13:00:13,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:00:12" (1/3) ... [2020-12-23 13:00:13,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be94279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:00:13, skipping insertion in model container [2020-12-23 13:00:13,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:12" (2/3) ... [2020-12-23 13:00:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be94279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:00:13, skipping insertion in model container [2020-12-23 13:00:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:00:13" (3/3) ... [2020-12-23 13:00:13,494 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-12-23 13:00:13,501 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-23 13:00:13,502 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 13:00:13,507 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 13:00:13,508 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-23 13:00:13,550 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,551 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,560 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,563 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,564 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,564 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,567 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,569 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,569 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,573 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,573 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,574 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,574 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,574 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,574 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,575 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,578 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,579 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,579 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,579 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,580 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,580 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,580 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,581 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,584 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,585 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,585 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,585 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,585 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,586 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,586 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,586 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,586 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,595 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,595 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,595 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,603 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,603 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,604 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:13,606 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-23 13:00:13,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 13:00:13,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 13:00:13,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 13:00:13,657 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 13:00:13,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 13:00:13,658 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 13:00:13,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 13:00:13,658 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 13:00:13,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 13:00:13,672 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-23 13:00:13,674 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:13,679 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:13,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:13,724 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2020-12-23 13:00:13,725 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-23 13:00:13,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 60 events. 5/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2020-12-23 13:00:13,743 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2020-12-23 13:00:16,370 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-23 13:00:16,508 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 13:00:16,776 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-23 13:00:16,906 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 13:00:16,910 INFO L131 LiptonReduction]: Checked pairs total: 1025 [2020-12-23 13:00:16,910 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-23 13:00:16,917 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-23 13:00:16,927 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-23 13:00:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-23 13:00:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 13:00:16,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:16,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 13:00:16,935 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:16,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1040872604, now seen corresponding path program 1 times [2020-12-23 13:00:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:16,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152429355] [2020-12-23 13:00:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:17,219 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 13:00:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152429355] [2020-12-23 13:00:17,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:17,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 13:00:17,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841393703] [2020-12-23 13:00:17,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 13:00:17,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 13:00:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 13:00:17,274 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-23 13:00:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:17,345 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-23 13:00:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:00:17,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 13:00:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:17,359 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:00:17,359 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 13:00:17,360 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 13:00:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 13:00:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-23 13:00:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 13:00:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-23 13:00:17,405 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-23 13:00:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:17,406 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-23 13:00:17,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 13:00:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-23 13:00:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:17,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:17,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:17,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 13:00:17,408 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash 947244113, now seen corresponding path program 1 times [2020-12-23 13:00:17,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:17,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474118158] [2020-12-23 13:00:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:17,518 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 13:00:17,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474118158] [2020-12-23 13:00:17,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:17,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:17,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472690145] [2020-12-23 13:00:17,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:17,522 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-23 13:00:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:17,572 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-12-23 13:00:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:17,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:17,574 INFO L225 Difference]: With dead ends: 80 [2020-12-23 13:00:17,574 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 13:00:17,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 13:00:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 13:00:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-12-23 13:00:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:00:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-23 13:00:17,586 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-12-23 13:00:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:17,587 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-23 13:00:17,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-23 13:00:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:17,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:17,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:17,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 13:00:17,589 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash 448812566, now seen corresponding path program 1 times [2020-12-23 13:00:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:17,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852360527] [2020-12-23 13:00:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:17,666 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 13:00:17,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852360527] [2020-12-23 13:00:17,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:17,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499195326] [2020-12-23 13:00:17,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:17,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:17,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:17,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:17,669 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-12-23 13:00:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:17,696 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-12-23 13:00:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:00:17,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:17,698 INFO L225 Difference]: With dead ends: 73 [2020-12-23 13:00:17,698 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 13:00:17,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 13:00:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 13:00:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:00:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-12-23 13:00:17,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-12-23 13:00:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:17,709 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-12-23 13:00:17,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-12-23 13:00:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:17,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:17,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:17,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 13:00:17,711 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash 449093426, now seen corresponding path program 2 times [2020-12-23 13:00:17,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:17,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830860773] [2020-12-23 13:00:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:17,824 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 13:00:17,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830860773] [2020-12-23 13:00:17,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:17,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:17,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683909571] [2020-12-23 13:00:17,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:17,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:17,830 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-12-23 13:00:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:17,888 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-12-23 13:00:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:17,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:17,896 INFO L225 Difference]: With dead ends: 86 [2020-12-23 13:00:17,896 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 13:00:17,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 13:00:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 13:00:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-23 13:00:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:00:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-12-23 13:00:17,906 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-12-23 13:00:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:17,906 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-12-23 13:00:17,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-12-23 13:00:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:17,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:17,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:17,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 13:00:17,908 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash -672996833, now seen corresponding path program 2 times [2020-12-23 13:00:17,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:17,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229978577] [2020-12-23 13:00:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:17,983 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 13:00:17,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229978577] [2020-12-23 13:00:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314562742] [2020-12-23 13:00:17,984 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 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 13:00:18,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:18,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:18,274 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 13:00:18,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:18,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-23 13:00:18,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407192015] [2020-12-23 13:00:18,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:00:18,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:18,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:00:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:18,280 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-12-23 13:00:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:18,421 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2020-12-23 13:00:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:18,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-23 13:00:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:18,423 INFO L225 Difference]: With dead ends: 121 [2020-12-23 13:00:18,423 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:00:18,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:00:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2020-12-23 13:00:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 13:00:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-12-23 13:00:18,434 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2020-12-23 13:00:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:18,434 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-12-23 13:00:18,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:00:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-12-23 13:00:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:18,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:18,436 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:18,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:18,651 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1028288236, now seen corresponding path program 3 times [2020-12-23 13:00:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:18,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473829370] [2020-12-23 13:00:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:18,735 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 13:00:18,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473829370] [2020-12-23 13:00:18,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282771041] [2020-12-23 13:00:18,736 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 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 13:00:18,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:18,876 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 13:00:18,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:18,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:18,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066756862] [2020-12-23 13:00:18,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:18,879 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 9 states. [2020-12-23 13:00:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:18,921 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2020-12-23 13:00:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 13:00:18,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:18,923 INFO L225 Difference]: With dead ends: 89 [2020-12-23 13:00:18,923 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 13:00:18,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 13:00:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-23 13:00:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:00:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-12-23 13:00:18,932 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2020-12-23 13:00:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:18,933 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-12-23 13:00:18,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-12-23 13:00:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:18,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:18,934 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:19,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:19,148 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1036994896, now seen corresponding path program 4 times [2020-12-23 13:00:19,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:19,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603799900] [2020-12-23 13:00:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:19,213 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 13:00:19,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603799900] [2020-12-23 13:00:19,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232695973] [2020-12-23 13:00:19,214 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 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 13:00:19,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:19,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:19,376 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 13:00:19,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:19,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:19,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665814862] [2020-12-23 13:00:19,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:19,382 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 9 states. [2020-12-23 13:00:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:19,437 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-12-23 13:00:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:19,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:19,440 INFO L225 Difference]: With dead ends: 95 [2020-12-23 13:00:19,440 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 13:00:19,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 13:00:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-12-23 13:00:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 13:00:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-12-23 13:00:19,463 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2020-12-23 13:00:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:19,464 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-12-23 13:00:19,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-12-23 13:00:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:19,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:19,470 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:19,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:19,671 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1037016286, now seen corresponding path program 5 times [2020-12-23 13:00:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724725113] [2020-12-23 13:00:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:19,771 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 13:00:19,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724725113] [2020-12-23 13:00:19,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297158353] [2020-12-23 13:00:19,772 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 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 13:00:19,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:19,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:19,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:19,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:19,919 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 13:00:19,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:19,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613052661] [2020-12-23 13:00:19,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:19,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:19,921 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2020-12-23 13:00:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:20,013 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-12-23 13:00:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:20,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:20,016 INFO L225 Difference]: With dead ends: 104 [2020-12-23 13:00:20,016 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 13:00:20,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 13:00:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-12-23 13:00:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 13:00:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-12-23 13:00:20,043 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2020-12-23 13:00:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:20,044 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-12-23 13:00:20,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-12-23 13:00:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:20,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:20,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:20,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:20,246 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash -231469117, now seen corresponding path program 1 times [2020-12-23 13:00:20,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909014246] [2020-12-23 13:00:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:20,345 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 13:00:20,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909014246] [2020-12-23 13:00:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:20,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688664262] [2020-12-23 13:00:20,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:20,347 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2020-12-23 13:00:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:20,391 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-12-23 13:00:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:20,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:20,393 INFO L225 Difference]: With dead ends: 101 [2020-12-23 13:00:20,393 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 13:00:20,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 13:00:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 13:00:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-12-23 13:00:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 13:00:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2020-12-23 13:00:20,412 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2020-12-23 13:00:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:20,413 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2020-12-23 13:00:20,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2020-12-23 13:00:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:20,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:20,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:20,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 13:00:20,415 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash -231188257, now seen corresponding path program 2 times [2020-12-23 13:00:20,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:20,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630375803] [2020-12-23 13:00:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:20,521 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 13:00:20,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630375803] [2020-12-23 13:00:20,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:20,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:20,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359345111] [2020-12-23 13:00:20,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:20,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:20,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:20,527 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2020-12-23 13:00:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:20,597 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2020-12-23 13:00:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:20,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:20,600 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:00:20,600 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 13:00:20,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 13:00:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-23 13:00:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 13:00:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2020-12-23 13:00:20,608 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2020-12-23 13:00:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:20,608 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2020-12-23 13:00:20,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2020-12-23 13:00:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:20,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:20,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:20,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 13:00:20,612 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:20,612 INFO L82 PathProgramCache]: Analyzing trace with hash -598460671, now seen corresponding path program 3 times [2020-12-23 13:00:20,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:20,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351099876] [2020-12-23 13:00:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:20,700 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 13:00:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351099876] [2020-12-23 13:00:20,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:20,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:20,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598108820] [2020-12-23 13:00:20,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:20,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:20,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:20,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:20,703 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2020-12-23 13:00:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:20,772 INFO L93 Difference]: Finished difference Result 110 states and 262 transitions. [2020-12-23 13:00:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:20,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:20,774 INFO L225 Difference]: With dead ends: 110 [2020-12-23 13:00:20,774 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:00:20,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:00:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-12-23 13:00:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 13:00:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-12-23 13:00:20,780 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-12-23 13:00:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:20,781 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-12-23 13:00:20,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-12-23 13:00:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:20,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:20,783 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:20,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 13:00:20,783 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1812164822, now seen corresponding path program 6 times [2020-12-23 13:00:20,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:20,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737207435] [2020-12-23 13:00:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:20,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737207435] [2020-12-23 13:00:20,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048565557] [2020-12-23 13:00:20,868 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 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 13:00:20,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:20,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:20,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:21,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:21,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017812338] [2020-12-23 13:00:21,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:21,026 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-12-23 13:00:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:21,063 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-12-23 13:00:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:21,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:21,065 INFO L225 Difference]: With dead ends: 108 [2020-12-23 13:00:21,065 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:00:21,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:00:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-12-23 13:00:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 13:00:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-12-23 13:00:21,069 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-12-23 13:00:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:21,070 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-12-23 13:00:21,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-12-23 13:00:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:21,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:21,070 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:21,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 13:00:21,286 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2082071282, now seen corresponding path program 7 times [2020-12-23 13:00:21,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:21,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999486108] [2020-12-23 13:00:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:21,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999486108] [2020-12-23 13:00:21,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954042843] [2020-12-23 13:00:21,399 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 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 13:00:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:21,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:21,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:21,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116295324] [2020-12-23 13:00:21,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:21,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:21,615 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-12-23 13:00:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:21,662 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-12-23 13:00:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:21,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:21,664 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:00:21,664 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:00:21,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:00:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-12-23 13:00:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 13:00:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-12-23 13:00:21,672 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-12-23 13:00:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:21,672 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-12-23 13:00:21,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-12-23 13:00:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:21,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:21,673 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:21,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:21,888 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2082734372, now seen corresponding path program 8 times [2020-12-23 13:00:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:21,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311912874] [2020-12-23 13:00:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:21,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311912874] [2020-12-23 13:00:21,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460879347] [2020-12-23 13:00:21,952 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 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 13:00:22,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:22,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:22,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:22,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111495070] [2020-12-23 13:00:22,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:22,090 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-12-23 13:00:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:22,161 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-12-23 13:00:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:22,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:22,162 INFO L225 Difference]: With dead ends: 115 [2020-12-23 13:00:22,162 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 13:00:22,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 13:00:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-12-23 13:00:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 13:00:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-12-23 13:00:22,167 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-12-23 13:00:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:22,167 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-12-23 13:00:22,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-12-23 13:00:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:22,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:22,168 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:22,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 13:00:22,383 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2082755762, now seen corresponding path program 9 times [2020-12-23 13:00:22,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:22,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769163759] [2020-12-23 13:00:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:22,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769163759] [2020-12-23 13:00:22,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592304756] [2020-12-23 13:00:22,465 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 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 13:00:22,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:22,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:22,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:22,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:22,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:22,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366723469] [2020-12-23 13:00:22,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:22,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:22,590 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-12-23 13:00:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:22,709 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-12-23 13:00:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:22,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:22,710 INFO L225 Difference]: With dead ends: 124 [2020-12-23 13:00:22,710 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 13:00:22,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 13:00:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-12-23 13:00:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 13:00:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-12-23 13:00:22,715 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-12-23 13:00:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:22,716 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-12-23 13:00:22,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-12-23 13:00:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:22,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:22,717 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:22,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 13:00:22,932 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1634246561, now seen corresponding path program 3 times [2020-12-23 13:00:22,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:22,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184921270] [2020-12-23 13:00:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:23,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184921270] [2020-12-23 13:00:23,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186888475] [2020-12-23 13:00:23,043 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 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 13:00:23,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:23,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:23,221 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:23,241 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 13:00:23,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:23,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:23,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426644296] [2020-12-23 13:00:23,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:23,244 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 14 states. [2020-12-23 13:00:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:23,385 INFO L93 Difference]: Finished difference Result 161 states and 377 transitions. [2020-12-23 13:00:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:23,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:23,387 INFO L225 Difference]: With dead ends: 161 [2020-12-23 13:00:23,387 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 13:00:23,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:00:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 13:00:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2020-12-23 13:00:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 13:00:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-12-23 13:00:23,396 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 11 [2020-12-23 13:00:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:23,397 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-12-23 13:00:23,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-12-23 13:00:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:23,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:23,398 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:23,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 13:00:23,612 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1790110225, now seen corresponding path program 4 times [2020-12-23 13:00:23,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:23,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207795779] [2020-12-23 13:00:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:23,683 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 13:00:23,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207795779] [2020-12-23 13:00:23,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960865405] [2020-12-23 13:00:23,684 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 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 13:00:23,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:23,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:23,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:23,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:23,831 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 13:00:23,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:23,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:23,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053997373] [2020-12-23 13:00:23,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:23,833 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 11 states. [2020-12-23 13:00:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:23,940 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2020-12-23 13:00:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:23,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:23,942 INFO L225 Difference]: With dead ends: 126 [2020-12-23 13:00:23,942 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 13:00:23,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 13:00:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-12-23 13:00:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 13:00:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2020-12-23 13:00:23,948 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 11 [2020-12-23 13:00:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:23,949 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2020-12-23 13:00:23,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2020-12-23 13:00:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:23,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:23,950 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:24,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 13:00:24,164 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1790391085, now seen corresponding path program 5 times [2020-12-23 13:00:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:24,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189367437] [2020-12-23 13:00:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:24,232 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 13:00:24,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189367437] [2020-12-23 13:00:24,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243704533] [2020-12-23 13:00:24,233 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 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 13:00:24,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:24,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:24,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:24,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:24,413 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 13:00:24,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:24,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224919490] [2020-12-23 13:00:24,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:24,416 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand 11 states. [2020-12-23 13:00:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:24,602 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-12-23 13:00:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:24,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:24,604 INFO L225 Difference]: With dead ends: 155 [2020-12-23 13:00:24,604 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 13:00:24,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 13:00:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-12-23 13:00:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 13:00:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-12-23 13:00:24,609 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 11 [2020-12-23 13:00:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:24,609 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-12-23 13:00:24,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-12-23 13:00:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:24,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:24,610 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:24,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 13:00:24,822 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1414392543, now seen corresponding path program 6 times [2020-12-23 13:00:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:24,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60213577] [2020-12-23 13:00:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:24,900 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 13:00:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60213577] [2020-12-23 13:00:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142110755] [2020-12-23 13:00:24,900 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 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 13:00:24,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:24,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:24,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:25,037 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 13:00:25,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:25,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724987096] [2020-12-23 13:00:25,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:25,039 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 11 states. [2020-12-23 13:00:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:25,129 INFO L93 Difference]: Finished difference Result 136 states and 326 transitions. [2020-12-23 13:00:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:25,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:25,131 INFO L225 Difference]: With dead ends: 136 [2020-12-23 13:00:25,131 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 13:00:25,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 13:00:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-12-23 13:00:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 13:00:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 277 transitions. [2020-12-23 13:00:25,136 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 277 transitions. Word has length 11 [2020-12-23 13:00:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:25,137 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 277 transitions. [2020-12-23 13:00:25,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 277 transitions. [2020-12-23 13:00:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:25,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:25,138 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:25,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:25,352 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1423099203, now seen corresponding path program 7 times [2020-12-23 13:00:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894214401] [2020-12-23 13:00:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:25,413 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 13:00:25,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894214401] [2020-12-23 13:00:25,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932735741] [2020-12-23 13:00:25,413 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 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 13:00:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:25,562 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 13:00:25,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:25,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:25,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331150958] [2020-12-23 13:00:25,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:25,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:25,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:25,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:25,564 INFO L87 Difference]: Start difference. First operand 111 states and 277 transitions. Second operand 11 states. [2020-12-23 13:00:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:25,704 INFO L93 Difference]: Finished difference Result 137 states and 330 transitions. [2020-12-23 13:00:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:25,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:25,709 INFO L225 Difference]: With dead ends: 137 [2020-12-23 13:00:25,709 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 13:00:25,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 13:00:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2020-12-23 13:00:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 13:00:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 284 transitions. [2020-12-23 13:00:25,723 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 284 transitions. Word has length 11 [2020-12-23 13:00:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:25,723 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 284 transitions. [2020-12-23 13:00:25,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 284 transitions. [2020-12-23 13:00:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:25,724 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:25,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-23 13:00:25,938 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1423120593, now seen corresponding path program 8 times [2020-12-23 13:00:25,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:25,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461389790] [2020-12-23 13:00:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:26,001 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 13:00:26,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461389790] [2020-12-23 13:00:26,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346592281] [2020-12-23 13:00:26,002 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 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 13:00:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:26,123 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 13:00:26,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:26,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:26,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999242656] [2020-12-23 13:00:26,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:26,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:26,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:26,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:26,125 INFO L87 Difference]: Start difference. First operand 113 states and 284 transitions. Second operand 11 states. [2020-12-23 13:00:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:26,348 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-12-23 13:00:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:26,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:26,349 INFO L225 Difference]: With dead ends: 160 [2020-12-23 13:00:26,350 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 13:00:26,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 13:00:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2020-12-23 13:00:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 13:00:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2020-12-23 13:00:26,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 11 [2020-12-23 13:00:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:26,356 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2020-12-23 13:00:26,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2020-12-23 13:00:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:26,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:26,356 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:26,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:26,572 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1642922929, now seen corresponding path program 9 times [2020-12-23 13:00:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:26,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584360654] [2020-12-23 13:00:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:26,634 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 13:00:26,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584360654] [2020-12-23 13:00:26,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685000912] [2020-12-23 13:00:26,634 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 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 13:00:26,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:26,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:26,745 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 13:00:26,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:26,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083414751] [2020-12-23 13:00:26,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:26,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:26,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:26,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:26,747 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 11 states. [2020-12-23 13:00:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:26,812 INFO L93 Difference]: Finished difference Result 136 states and 330 transitions. [2020-12-23 13:00:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:26,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:26,814 INFO L225 Difference]: With dead ends: 136 [2020-12-23 13:00:26,814 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 13:00:26,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 13:00:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-12-23 13:00:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 13:00:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 282 transitions. [2020-12-23 13:00:26,820 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 282 transitions. Word has length 11 [2020-12-23 13:00:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:26,820 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 282 transitions. [2020-12-23 13:00:26,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 282 transitions. [2020-12-23 13:00:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:26,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:26,839 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:27,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 13:00:27,049 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1373016469, now seen corresponding path program 10 times [2020-12-23 13:00:27,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:27,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047161055] [2020-12-23 13:00:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:27,133 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 13:00:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047161055] [2020-12-23 13:00:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726826418] [2020-12-23 13:00:27,134 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 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 13:00:27,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:27,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:27,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:27,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:27,254 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 13:00:27,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:27,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:27,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062546801] [2020-12-23 13:00:27,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:27,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:27,256 INFO L87 Difference]: Start difference. First operand 112 states and 282 transitions. Second operand 11 states. [2020-12-23 13:00:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:27,330 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-12-23 13:00:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:27,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:27,332 INFO L225 Difference]: With dead ends: 142 [2020-12-23 13:00:27,332 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 13:00:27,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 13:00:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-12-23 13:00:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 13:00:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 277 transitions. [2020-12-23 13:00:27,338 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 277 transitions. Word has length 11 [2020-12-23 13:00:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:27,338 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 277 transitions. [2020-12-23 13:00:27,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 277 transitions. [2020-12-23 13:00:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:27,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:27,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:27,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:27,555 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:27,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1372411039, now seen corresponding path program 11 times [2020-12-23 13:00:27,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:27,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112428558] [2020-12-23 13:00:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:27,612 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 13:00:27,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112428558] [2020-12-23 13:00:27,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949518864] [2020-12-23 13:00:27,613 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 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 13:00:27,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:27,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:27,738 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 13:00:27,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:27,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:27,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716388943] [2020-12-23 13:00:27,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:27,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:27,740 INFO L87 Difference]: Start difference. First operand 110 states and 277 transitions. Second operand 11 states. [2020-12-23 13:00:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:27,838 INFO L93 Difference]: Finished difference Result 142 states and 340 transitions. [2020-12-23 13:00:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:27,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:27,841 INFO L225 Difference]: With dead ends: 142 [2020-12-23 13:00:27,841 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 13:00:27,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 13:00:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-12-23 13:00:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 13:00:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-12-23 13:00:27,847 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2020-12-23 13:00:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:27,848 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-12-23 13:00:27,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-12-23 13:00:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:27,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:27,849 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:28,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 13:00:28,062 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1372391571, now seen corresponding path program 12 times [2020-12-23 13:00:28,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:28,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428846104] [2020-12-23 13:00:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:28,141 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 13:00:28,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428846104] [2020-12-23 13:00:28,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779294732] [2020-12-23 13:00:28,142 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 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 13:00:28,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:28,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:28,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:28,252 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 13:00:28,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:28,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706122631] [2020-12-23 13:00:28,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:28,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:28,254 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 11 states. [2020-12-23 13:00:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:28,408 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2020-12-23 13:00:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:28,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:28,410 INFO L225 Difference]: With dead ends: 157 [2020-12-23 13:00:28,410 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 13:00:28,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 13:00:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2020-12-23 13:00:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 13:00:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2020-12-23 13:00:28,417 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 11 [2020-12-23 13:00:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:28,418 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2020-12-23 13:00:28,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2020-12-23 13:00:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:28,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:28,422 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:28,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 13:00:28,636 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1372389649, now seen corresponding path program 13 times [2020-12-23 13:00:28,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:28,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493748568] [2020-12-23 13:00:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:28,710 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 13:00:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493748568] [2020-12-23 13:00:28,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282515411] [2020-12-23 13:00:28,711 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 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 13:00:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:28,821 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 13:00:28,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:28,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:28,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128490123] [2020-12-23 13:00:28,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:28,824 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand 11 states. [2020-12-23 13:00:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:29,072 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-12-23 13:00:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:29,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:29,074 INFO L225 Difference]: With dead ends: 161 [2020-12-23 13:00:29,074 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 13:00:29,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 13:00:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2020-12-23 13:00:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 13:00:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 283 transitions. [2020-12-23 13:00:29,080 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 283 transitions. Word has length 11 [2020-12-23 13:00:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:29,081 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 283 transitions. [2020-12-23 13:00:29,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 283 transitions. [2020-12-23 13:00:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:29,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:29,082 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:29,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 13:00:29,296 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash 342535212, now seen corresponding path program 10 times [2020-12-23 13:00:29,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:29,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739590562] [2020-12-23 13:00:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,370 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 13:00:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739590562] [2020-12-23 13:00:29,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027000615] [2020-12-23 13:00:29,371 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 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 13:00:29,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:29,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:29,537 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 13:00:29,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:29,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:29,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531709185] [2020-12-23 13:00:29,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:29,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:29,539 INFO L87 Difference]: Start difference. First operand 112 states and 283 transitions. Second operand 14 states. [2020-12-23 13:00:29,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:29,591 INFO L93 Difference]: Finished difference Result 139 states and 337 transitions. [2020-12-23 13:00:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:29,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:29,592 INFO L225 Difference]: With dead ends: 139 [2020-12-23 13:00:29,592 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 13:00:29,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 13:00:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-12-23 13:00:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 13:00:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-23 13:00:29,597 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-23 13:00:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:29,598 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-23 13:00:29,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-23 13:00:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:29,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:29,599 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:29,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 13:00:29,813 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash 119700880, now seen corresponding path program 11 times [2020-12-23 13:00:29,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:29,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300292465] [2020-12-23 13:00:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,882 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 13:00:29,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300292465] [2020-12-23 13:00:29,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615959466] [2020-12-23 13:00:29,883 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 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 13:00:29,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:00:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:30,075 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 13:00:30,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:30,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:30,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019822548] [2020-12-23 13:00:30,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:30,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:30,078 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-23 13:00:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:30,144 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-12-23 13:00:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:30,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:30,147 INFO L225 Difference]: With dead ends: 150 [2020-12-23 13:00:30,147 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 13:00:30,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 13:00:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2020-12-23 13:00:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 13:00:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-23 13:00:30,154 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-23 13:00:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:30,154 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-23 13:00:30,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-23 13:00:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:30,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:30,155 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:30,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 13:00:30,369 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 140256670, now seen corresponding path program 12 times [2020-12-23 13:00:30,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:30,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472048712] [2020-12-23 13:00:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:30,447 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 13:00:30,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472048712] [2020-12-23 13:00:30,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031255085] [2020-12-23 13:00:30,448 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 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 13:00:30,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:30,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:30,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:30,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:30,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996862837] [2020-12-23 13:00:30,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:30,596 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-23 13:00:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:30,680 INFO L93 Difference]: Finished difference Result 148 states and 353 transitions. [2020-12-23 13:00:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:30,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:30,682 INFO L225 Difference]: With dead ends: 148 [2020-12-23 13:00:30,682 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 13:00:30,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 13:00:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-12-23 13:00:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 13:00:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 296 transitions. [2020-12-23 13:00:30,688 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 296 transitions. Word has length 11 [2020-12-23 13:00:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:30,689 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 296 transitions. [2020-12-23 13:00:30,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 296 transitions. [2020-12-23 13:00:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:30,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:30,690 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:30,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:30,905 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash 140919760, now seen corresponding path program 13 times [2020-12-23 13:00:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:30,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363762834] [2020-12-23 13:00:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:30,964 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 13:00:30,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363762834] [2020-12-23 13:00:30,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969590881] [2020-12-23 13:00:30,965 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 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 13:00:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:31,110 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 13:00:31,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:31,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:31,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444774488] [2020-12-23 13:00:31,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:31,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:31,113 INFO L87 Difference]: Start difference. First operand 118 states and 296 transitions. Second operand 14 states. [2020-12-23 13:00:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,213 INFO L93 Difference]: Finished difference Result 147 states and 353 transitions. [2020-12-23 13:00:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:31,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,215 INFO L225 Difference]: With dead ends: 147 [2020-12-23 13:00:31,215 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 13:00:31,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:00:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 13:00:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2020-12-23 13:00:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 13:00:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 303 transitions. [2020-12-23 13:00:31,221 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 303 transitions. Word has length 11 [2020-12-23 13:00:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,222 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 303 transitions. [2020-12-23 13:00:31,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 303 transitions. [2020-12-23 13:00:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:31,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,222 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:31,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:31,436 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:31,437 INFO L82 PathProgramCache]: Analyzing trace with hash 140941150, now seen corresponding path program 14 times [2020-12-23 13:00:31,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:31,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024515464] [2020-12-23 13:00:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,515 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 13:00:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024515464] [2020-12-23 13:00:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271655405] [2020-12-23 13:00:31,515 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 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 13:00:31,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:31,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:31,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:31,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:31,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683302853] [2020-12-23 13:00:31,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:31,701 INFO L87 Difference]: Start difference. First operand 120 states and 303 transitions. Second operand 14 states. [2020-12-23 13:00:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,916 INFO L93 Difference]: Finished difference Result 172 states and 415 transitions. [2020-12-23 13:00:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:31,917 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,918 INFO L225 Difference]: With dead ends: 172 [2020-12-23 13:00:31,918 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 13:00:31,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:00:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 13:00:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2020-12-23 13:00:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 13:00:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 320 transitions. [2020-12-23 13:00:31,927 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 320 transitions. Word has length 11 [2020-12-23 13:00:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,927 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 320 transitions. [2020-12-23 13:00:31,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 320 transitions. [2020-12-23 13:00:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:31,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,928 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:32,142 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 34560387, now seen corresponding path program 14 times [2020-12-23 13:00:32,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212922411] [2020-12-23 13:00:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212922411] [2020-12-23 13:00:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911815870] [2020-12-23 13:00:32,214 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 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 13:00:32,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:32,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350519674] [2020-12-23 13:00:32,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:32,380 INFO L87 Difference]: Start difference. First operand 125 states and 320 transitions. Second operand 14 states. [2020-12-23 13:00:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:32,500 INFO L93 Difference]: Finished difference Result 153 states and 371 transitions. [2020-12-23 13:00:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:32,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:32,502 INFO L225 Difference]: With dead ends: 153 [2020-12-23 13:00:32,502 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 13:00:32,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:00:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 13:00:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2020-12-23 13:00:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 13:00:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 332 transitions. [2020-12-23 13:00:32,508 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 332 transitions. Word has length 12 [2020-12-23 13:00:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:32,508 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 332 transitions. [2020-12-23 13:00:32,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 332 transitions. [2020-12-23 13:00:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:32,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:32,509 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 13:00:32,723 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash 34841247, now seen corresponding path program 15 times [2020-12-23 13:00:32,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199606201] [2020-12-23 13:00:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199606201] [2020-12-23 13:00:32,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293933754] [2020-12-23 13:00:32,788 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 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 13:00:32,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:32,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:32,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:32,944 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:32,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:32,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:32,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44772142] [2020-12-23 13:00:32,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:32,963 INFO L87 Difference]: Start difference. First operand 131 states and 332 transitions. Second operand 13 states. [2020-12-23 13:00:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:33,228 INFO L93 Difference]: Finished difference Result 187 states and 451 transitions. [2020-12-23 13:00:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:33,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:33,233 INFO L225 Difference]: With dead ends: 187 [2020-12-23 13:00:33,234 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 13:00:33,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 13:00:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2020-12-23 13:00:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 13:00:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2020-12-23 13:00:33,243 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2020-12-23 13:00:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:33,243 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2020-12-23 13:00:33,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2020-12-23 13:00:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:33,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:33,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:33,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:33,461 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -341157295, now seen corresponding path program 16 times [2020-12-23 13:00:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:33,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87615303] [2020-12-23 13:00:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:33,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87615303] [2020-12-23 13:00:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236630824] [2020-12-23 13:00:33,542 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 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 13:00:33,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:33,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:33,708 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 13:00:33,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:33,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:33,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426229686] [2020-12-23 13:00:33,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:33,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:33,710 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2020-12-23 13:00:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:33,876 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-12-23 13:00:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:33,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:33,878 INFO L225 Difference]: With dead ends: 167 [2020-12-23 13:00:33,878 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 13:00:33,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 13:00:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2020-12-23 13:00:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 13:00:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 327 transitions. [2020-12-23 13:00:33,883 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 327 transitions. Word has length 12 [2020-12-23 13:00:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:33,884 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 327 transitions. [2020-12-23 13:00:33,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 327 transitions. [2020-12-23 13:00:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:33,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:33,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 13:00:34,099 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,099 INFO L82 PathProgramCache]: Analyzing trace with hash -332450635, now seen corresponding path program 17 times [2020-12-23 13:00:34,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357482052] [2020-12-23 13:00:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,169 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 13:00:34,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357482052] [2020-12-23 13:00:34,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321817094] [2020-12-23 13:00:34,170 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 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 13:00:34,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:34,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:34,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:34,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:34,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798891213] [2020-12-23 13:00:34,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:34,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:34,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:34,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:34,356 INFO L87 Difference]: Start difference. First operand 130 states and 327 transitions. Second operand 14 states. [2020-12-23 13:00:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,558 INFO L93 Difference]: Finished difference Result 165 states and 397 transitions. [2020-12-23 13:00:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:00:34,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,560 INFO L225 Difference]: With dead ends: 165 [2020-12-23 13:00:34,560 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 13:00:34,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 13:00:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2020-12-23 13:00:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 13:00:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 334 transitions. [2020-12-23 13:00:34,566 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 334 transitions. Word has length 12 [2020-12-23 13:00:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,566 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 334 transitions. [2020-12-23 13:00:34,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 334 transitions. [2020-12-23 13:00:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:34,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:34,781 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash -332429245, now seen corresponding path program 18 times [2020-12-23 13:00:34,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889733806] [2020-12-23 13:00:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,853 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 13:00:34,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889733806] [2020-12-23 13:00:34,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312974500] [2020-12-23 13:00:34,854 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 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 13:00:34,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:35,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:35,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:35,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:35,043 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 13:00:35,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:35,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:35,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99522006] [2020-12-23 13:00:35,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:35,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:35,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:35,045 INFO L87 Difference]: Start difference. First operand 132 states and 334 transitions. Second operand 13 states. [2020-12-23 13:00:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:35,321 INFO L93 Difference]: Finished difference Result 190 states and 459 transitions. [2020-12-23 13:00:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:35,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:35,323 INFO L225 Difference]: With dead ends: 190 [2020-12-23 13:00:35,323 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 13:00:35,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 13:00:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 126. [2020-12-23 13:00:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 13:00:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2020-12-23 13:00:35,329 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2020-12-23 13:00:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:35,329 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2020-12-23 13:00:35,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2020-12-23 13:00:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:35,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:35,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:35,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 13:00:35,545 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 896494529, now seen corresponding path program 19 times [2020-12-23 13:00:35,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:35,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412602900] [2020-12-23 13:00:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:35,621 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 13:00:35,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412602900] [2020-12-23 13:00:35,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067911035] [2020-12-23 13:00:35,621 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 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 13:00:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:35,798 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 13:00:35,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:35,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:35,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473042038] [2020-12-23 13:00:35,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:35,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:35,801 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2020-12-23 13:00:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:35,956 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-12-23 13:00:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:35,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:35,958 INFO L225 Difference]: With dead ends: 171 [2020-12-23 13:00:35,958 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 13:00:35,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 13:00:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2020-12-23 13:00:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 13:00:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 328 transitions. [2020-12-23 13:00:35,964 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 328 transitions. Word has length 12 [2020-12-23 13:00:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:35,964 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 328 transitions. [2020-12-23 13:00:35,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 328 transitions. [2020-12-23 13:00:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:35,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:35,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:36,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:36,181 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1166400989, now seen corresponding path program 20 times [2020-12-23 13:00:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:36,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132634329] [2020-12-23 13:00:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:36,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132634329] [2020-12-23 13:00:36,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803721413] [2020-12-23 13:00:36,248 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 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 13:00:36,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:36,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:36,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:36,393 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 13:00:36,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:36,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:36,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512895399] [2020-12-23 13:00:36,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:36,395 INFO L87 Difference]: Start difference. First operand 131 states and 328 transitions. Second operand 14 states. [2020-12-23 13:00:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:36,589 INFO L93 Difference]: Finished difference Result 183 states and 431 transitions. [2020-12-23 13:00:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:36,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:36,591 INFO L225 Difference]: With dead ends: 183 [2020-12-23 13:00:36,591 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 13:00:36,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 13:00:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2020-12-23 13:00:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 13:00:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2020-12-23 13:00:36,597 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2020-12-23 13:00:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:36,598 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2020-12-23 13:00:36,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2020-12-23 13:00:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:36,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:36,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:36,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 13:00:36,810 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1167006419, now seen corresponding path program 21 times [2020-12-23 13:00:36,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:36,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8938207] [2020-12-23 13:00:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8938207] [2020-12-23 13:00:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571288937] [2020-12-23 13:00:36,879 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 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 13:00:36,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:36,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:36,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:37,043 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 13:00:37,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:37,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:37,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258126254] [2020-12-23 13:00:37,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:37,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:37,045 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 14 states. [2020-12-23 13:00:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:37,273 INFO L93 Difference]: Finished difference Result 176 states and 423 transitions. [2020-12-23 13:00:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:37,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:37,275 INFO L225 Difference]: With dead ends: 176 [2020-12-23 13:00:37,275 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 13:00:37,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 13:00:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2020-12-23 13:00:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2020-12-23 13:00:37,281 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2020-12-23 13:00:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:37,281 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2020-12-23 13:00:37,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2020-12-23 13:00:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:37,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:37,282 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:37,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 13:00:37,496 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1167025887, now seen corresponding path program 22 times [2020-12-23 13:00:37,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:37,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209502625] [2020-12-23 13:00:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209502625] [2020-12-23 13:00:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796089859] [2020-12-23 13:00:37,579 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 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 13:00:37,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:37,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:37,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:37,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:37,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:37,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823806053] [2020-12-23 13:00:37,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:37,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:37,739 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 14 states. [2020-12-23 13:00:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:38,163 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-12-23 13:00:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:00:38,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:38,165 INFO L225 Difference]: With dead ends: 217 [2020-12-23 13:00:38,165 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 13:00:38,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:00:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 13:00:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2020-12-23 13:00:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 352 transitions. [2020-12-23 13:00:38,172 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 352 transitions. Word has length 12 [2020-12-23 13:00:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:38,172 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 352 transitions. [2020-12-23 13:00:38,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 352 transitions. [2020-12-23 13:00:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:38,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:38,173 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:38,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 13:00:38,387 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:38,388 INFO L82 PathProgramCache]: Analyzing trace with hash 608997331, now seen corresponding path program 23 times [2020-12-23 13:00:38,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:38,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138813977] [2020-12-23 13:00:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:38,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138813977] [2020-12-23 13:00:38,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082608281] [2020-12-23 13:00:38,456 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 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 13:00:38,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:38,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:38,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:38,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:38,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:38,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:38,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692906800] [2020-12-23 13:00:38,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:38,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:38,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:38,603 INFO L87 Difference]: Start difference. First operand 136 states and 352 transitions. Second operand 14 states. [2020-12-23 13:00:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:38,738 INFO L93 Difference]: Finished difference Result 174 states and 430 transitions. [2020-12-23 13:00:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:38,739 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:38,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:38,740 INFO L225 Difference]: With dead ends: 174 [2020-12-23 13:00:38,741 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 13:00:38,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 13:00:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2020-12-23 13:00:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 13:00:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-12-23 13:00:38,746 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 12 [2020-12-23 13:00:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:38,747 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-12-23 13:00:38,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-12-23 13:00:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:38,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:38,748 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:38,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 13:00:38,962 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 609054991, now seen corresponding path program 24 times [2020-12-23 13:00:38,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:38,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071362516] [2020-12-23 13:00:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071362516] [2020-12-23 13:00:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414916248] [2020-12-23 13:00:39,039 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 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 13:00:39,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:39,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:39,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:39,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619830305] [2020-12-23 13:00:39,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:39,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:39,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:39,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:39,210 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 14 states. [2020-12-23 13:00:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:39,324 INFO L93 Difference]: Finished difference Result 172 states and 426 transitions. [2020-12-23 13:00:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:39,325 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:39,326 INFO L225 Difference]: With dead ends: 172 [2020-12-23 13:00:39,327 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 13:00:39,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:00:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 13:00:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2020-12-23 13:00:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 13:00:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 362 transitions. [2020-12-23 13:00:39,333 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 362 transitions. Word has length 12 [2020-12-23 13:00:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:39,334 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 362 transitions. [2020-12-23 13:00:39,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 362 transitions. [2020-12-23 13:00:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:39,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:39,335 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:39,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:39,550 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:39,551 INFO L82 PathProgramCache]: Analyzing trace with hash 386162999, now seen corresponding path program 25 times [2020-12-23 13:00:39,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:39,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963954795] [2020-12-23 13:00:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963954795] [2020-12-23 13:00:39,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639979488] [2020-12-23 13:00:39,606 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 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 13:00:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:39,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:39,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217911266] [2020-12-23 13:00:39,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:39,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:39,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:39,775 INFO L87 Difference]: Start difference. First operand 140 states and 362 transitions. Second operand 14 states. [2020-12-23 13:00:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:39,925 INFO L93 Difference]: Finished difference Result 181 states and 444 transitions. [2020-12-23 13:00:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:39,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:39,927 INFO L225 Difference]: With dead ends: 181 [2020-12-23 13:00:39,927 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 13:00:39,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 13:00:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-12-23 13:00:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 13:00:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 362 transitions. [2020-12-23 13:00:39,933 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 362 transitions. Word has length 12 [2020-12-23 13:00:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:39,935 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 362 transitions. [2020-12-23 13:00:39,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 362 transitions. [2020-12-23 13:00:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:39,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:39,936 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:40,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 13:00:40,149 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash 386220659, now seen corresponding path program 26 times [2020-12-23 13:00:40,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:40,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765607387] [2020-12-23 13:00:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765607387] [2020-12-23 13:00:40,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22675147] [2020-12-23 13:00:40,218 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 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 13:00:40,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:40,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:40,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695972060] [2020-12-23 13:00:40,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:40,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:40,373 INFO L87 Difference]: Start difference. First operand 140 states and 362 transitions. Second operand 14 states. [2020-12-23 13:00:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:40,503 INFO L93 Difference]: Finished difference Result 178 states and 437 transitions. [2020-12-23 13:00:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:40,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:40,506 INFO L225 Difference]: With dead ends: 178 [2020-12-23 13:00:40,506 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 13:00:40,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 13:00:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2020-12-23 13:00:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 13:00:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-12-23 13:00:40,512 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 12 [2020-12-23 13:00:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:40,512 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-12-23 13:00:40,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-12-23 13:00:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:40,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:40,513 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:40,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 13:00:40,725 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash 404931329, now seen corresponding path program 27 times [2020-12-23 13:00:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:40,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919698913] [2020-12-23 13:00:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919698913] [2020-12-23 13:00:40,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113905912] [2020-12-23 13:00:40,809 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 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 13:00:40,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:40,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:40,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:40,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553292438] [2020-12-23 13:00:40,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:40,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:40,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:40,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:40,963 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 14 states. [2020-12-23 13:00:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:41,170 INFO L93 Difference]: Finished difference Result 184 states and 446 transitions. [2020-12-23 13:00:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:41,171 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:41,173 INFO L225 Difference]: With dead ends: 184 [2020-12-23 13:00:41,173 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 13:00:41,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 13:00:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 139. [2020-12-23 13:00:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 13:00:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 359 transitions. [2020-12-23 13:00:41,180 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 359 transitions. Word has length 12 [2020-12-23 13:00:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:41,180 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 359 transitions. [2020-12-23 13:00:41,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 359 transitions. [2020-12-23 13:00:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:41,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:41,181 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:41,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:41,397 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash 405594419, now seen corresponding path program 28 times [2020-12-23 13:00:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:41,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159630097] [2020-12-23 13:00:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:41,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159630097] [2020-12-23 13:00:41,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801093572] [2020-12-23 13:00:41,459 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 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 13:00:41,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:41,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:41,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:41,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:41,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891105919] [2020-12-23 13:00:41,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:41,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:41,612 INFO L87 Difference]: Start difference. First operand 139 states and 359 transitions. Second operand 14 states. [2020-12-23 13:00:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:41,870 INFO L93 Difference]: Finished difference Result 185 states and 449 transitions. [2020-12-23 13:00:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:41,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:41,872 INFO L225 Difference]: With dead ends: 185 [2020-12-23 13:00:41,872 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 13:00:41,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 13:00:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 141. [2020-12-23 13:00:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 13:00:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 366 transitions. [2020-12-23 13:00:41,880 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 366 transitions. Word has length 12 [2020-12-23 13:00:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:41,881 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 366 transitions. [2020-12-23 13:00:41,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 366 transitions. [2020-12-23 13:00:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:41,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:41,882 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:42,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 13:00:42,095 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:42,096 INFO L82 PathProgramCache]: Analyzing trace with hash 405615809, now seen corresponding path program 29 times [2020-12-23 13:00:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:42,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336351765] [2020-12-23 13:00:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336351765] [2020-12-23 13:00:42,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663158627] [2020-12-23 13:00:42,158 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 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 13:00:42,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:42,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:42,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013899713] [2020-12-23 13:00:42,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:42,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:42,309 INFO L87 Difference]: Start difference. First operand 141 states and 366 transitions. Second operand 13 states. [2020-12-23 13:00:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:42,685 INFO L93 Difference]: Finished difference Result 206 states and 498 transitions. [2020-12-23 13:00:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:00:42,686 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:42,687 INFO L225 Difference]: With dead ends: 206 [2020-12-23 13:00:42,688 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 13:00:42,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:00:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 13:00:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 138. [2020-12-23 13:00:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 13:00:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-12-23 13:00:42,694 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 12 [2020-12-23 13:00:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:42,694 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-12-23 13:00:42,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-12-23 13:00:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:42,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:42,695 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:42,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:42,908 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 406776449, now seen corresponding path program 30 times [2020-12-23 13:00:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:42,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433130630] [2020-12-23 13:00:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433130630] [2020-12-23 13:00:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145106195] [2020-12-23 13:00:42,976 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 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 13:00:43,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:43,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:43,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:43,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437612443] [2020-12-23 13:00:43,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:43,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:43,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:43,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:43,127 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 14 states. [2020-12-23 13:00:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:43,287 INFO L93 Difference]: Finished difference Result 181 states and 441 transitions. [2020-12-23 13:00:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:43,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:43,290 INFO L225 Difference]: With dead ends: 181 [2020-12-23 13:00:43,290 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 13:00:43,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 13:00:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2020-12-23 13:00:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 352 transitions. [2020-12-23 13:00:43,295 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 352 transitions. Word has length 12 [2020-12-23 13:00:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:43,296 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 352 transitions. [2020-12-23 13:00:43,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 352 transitions. [2020-12-23 13:00:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:43,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:43,297 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:43,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 13:00:43,510 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash 407381879, now seen corresponding path program 31 times [2020-12-23 13:00:43,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:43,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240896497] [2020-12-23 13:00:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:43,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240896497] [2020-12-23 13:00:43,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912951989] [2020-12-23 13:00:43,582 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 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 13:00:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:43,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:43,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:43,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243152087] [2020-12-23 13:00:43,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:43,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:43,745 INFO L87 Difference]: Start difference. First operand 136 states and 352 transitions. Second operand 14 states. [2020-12-23 13:00:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:43,948 INFO L93 Difference]: Finished difference Result 177 states and 431 transitions. [2020-12-23 13:00:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:00:43,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:43,950 INFO L225 Difference]: With dead ends: 177 [2020-12-23 13:00:43,950 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 13:00:43,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 13:00:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-12-23 13:00:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 13:00:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 359 transitions. [2020-12-23 13:00:43,956 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 359 transitions. Word has length 12 [2020-12-23 13:00:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:43,957 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 359 transitions. [2020-12-23 13:00:43,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 359 transitions. [2020-12-23 13:00:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:43,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:43,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:44,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 13:00:44,171 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash 407401347, now seen corresponding path program 32 times [2020-12-23 13:00:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:44,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682543953] [2020-12-23 13:00:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:44,257 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 13:00:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682543953] [2020-12-23 13:00:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499825970] [2020-12-23 13:00:44,257 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 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 13:00:44,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:44,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:44,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:44,417 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 13:00:44,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:44,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:44,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197101463] [2020-12-23 13:00:44,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:44,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:44,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:44,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:44,419 INFO L87 Difference]: Start difference. First operand 138 states and 359 transitions. Second operand 14 states. [2020-12-23 13:00:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:44,717 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-12-23 13:00:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:44,717 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:44,719 INFO L225 Difference]: With dead ends: 219 [2020-12-23 13:00:44,720 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 13:00:44,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:00:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 13:00:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-12-23 13:00:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 352 transitions. [2020-12-23 13:00:44,725 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 352 transitions. Word has length 12 [2020-12-23 13:00:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:44,726 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 352 transitions. [2020-12-23 13:00:44,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 352 transitions. [2020-12-23 13:00:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:44,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:44,726 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:44,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 13:00:44,940 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1977266529, now seen corresponding path program 4 times [2020-12-23 13:00:44,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:44,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71613842] [2020-12-23 13:00:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:44,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71613842] [2020-12-23 13:00:44,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237182379] [2020-12-23 13:00:44,993 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 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 13:00:45,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:45,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:45,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 13:00:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:45,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 13:00:45,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-12-23 13:00:45,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096327378] [2020-12-23 13:00:45,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:00:45,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:45,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:00:45,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:45,066 INFO L87 Difference]: Start difference. First operand 136 states and 352 transitions. Second operand 8 states. [2020-12-23 13:00:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:45,086 INFO L93 Difference]: Finished difference Result 192 states and 531 transitions. [2020-12-23 13:00:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:45,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 13:00:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:45,089 INFO L225 Difference]: With dead ends: 192 [2020-12-23 13:00:45,089 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 13:00:45,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 13:00:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-12-23 13:00:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:00:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 518 transitions. [2020-12-23 13:00:45,096 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 518 transitions. Word has length 13 [2020-12-23 13:00:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:45,096 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 518 transitions. [2020-12-23 13:00:45,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:00:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 518 transitions. [2020-12-23 13:00:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:45,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:45,098 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:45,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 13:00:45,312 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1447090257, now seen corresponding path program 33 times [2020-12-23 13:00:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:45,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197429629] [2020-12-23 13:00:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:45,402 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 13:00:45,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197429629] [2020-12-23 13:00:45,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019269880] [2020-12-23 13:00:45,402 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 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 13:00:45,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:45,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:45,577 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 13:00:45,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:45,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:45,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632295516] [2020-12-23 13:00:45,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:45,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:45,579 INFO L87 Difference]: Start difference. First operand 185 states and 518 transitions. Second operand 16 states. [2020-12-23 13:00:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:45,712 INFO L93 Difference]: Finished difference Result 221 states and 588 transitions. [2020-12-23 13:00:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:45,713 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:45,714 INFO L225 Difference]: With dead ends: 221 [2020-12-23 13:00:45,715 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 13:00:45,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 13:00:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 191. [2020-12-23 13:00:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 13:00:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 530 transitions. [2020-12-23 13:00:45,721 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 530 transitions. Word has length 13 [2020-12-23 13:00:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:45,721 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 530 transitions. [2020-12-23 13:00:45,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 530 transitions. [2020-12-23 13:00:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:45,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:45,722 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:45,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:45,936 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:45,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1447371117, now seen corresponding path program 34 times [2020-12-23 13:00:45,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:45,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428916873] [2020-12-23 13:00:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:46,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428916873] [2020-12-23 13:00:46,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497055900] [2020-12-23 13:00:46,007 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 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 13:00:46,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:46,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:46,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:46,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:46,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:46,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:46,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417497097] [2020-12-23 13:00:46,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:46,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:46,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:46,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:46,197 INFO L87 Difference]: Start difference. First operand 191 states and 530 transitions. Second operand 16 states. [2020-12-23 13:00:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:46,557 INFO L93 Difference]: Finished difference Result 290 states and 741 transitions. [2020-12-23 13:00:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:46,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:46,559 INFO L225 Difference]: With dead ends: 290 [2020-12-23 13:00:46,559 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 13:00:46,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:00:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 13:00:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 184. [2020-12-23 13:00:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:00:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 521 transitions. [2020-12-23 13:00:46,565 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 521 transitions. Word has length 13 [2020-12-23 13:00:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:46,566 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 521 transitions. [2020-12-23 13:00:46,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 521 transitions. [2020-12-23 13:00:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:46,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:46,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:46,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 13:00:46,777 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1985942897, now seen corresponding path program 35 times [2020-12-23 13:00:46,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904743026] [2020-12-23 13:00:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:46,866 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 13:00:46,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904743026] [2020-12-23 13:00:46,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964212125] [2020-12-23 13:00:46,867 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 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 13:00:46,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:46,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:46,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:47,090 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 13:00:47,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:47,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:47,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673746005] [2020-12-23 13:00:47,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:47,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:47,092 INFO L87 Difference]: Start difference. First operand 184 states and 521 transitions. Second operand 16 states. [2020-12-23 13:00:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:47,333 INFO L93 Difference]: Finished difference Result 255 states and 668 transitions. [2020-12-23 13:00:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:47,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:47,335 INFO L225 Difference]: With dead ends: 255 [2020-12-23 13:00:47,335 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 13:00:47,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:00:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 13:00:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 189. [2020-12-23 13:00:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 13:00:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2020-12-23 13:00:47,342 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 13 [2020-12-23 13:00:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:47,342 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2020-12-23 13:00:47,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2020-12-23 13:00:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:47,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:47,343 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:47,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:47,556 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:47,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1716036437, now seen corresponding path program 36 times [2020-12-23 13:00:47,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:47,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674325978] [2020-12-23 13:00:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:47,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674325978] [2020-12-23 13:00:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954222493] [2020-12-23 13:00:47,634 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 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 13:00:47,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:47,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:47,866 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 13:00:47,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:47,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:47,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552552439] [2020-12-23 13:00:47,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:47,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:47,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:47,868 INFO L87 Difference]: Start difference. First operand 189 states and 530 transitions. Second operand 16 states. [2020-12-23 13:00:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:48,157 INFO L93 Difference]: Finished difference Result 271 states and 695 transitions. [2020-12-23 13:00:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:48,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:48,160 INFO L225 Difference]: With dead ends: 271 [2020-12-23 13:00:48,161 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 13:00:48,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 13:00:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 190. [2020-12-23 13:00:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 13:00:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 532 transitions. [2020-12-23 13:00:48,167 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 532 transitions. Word has length 13 [2020-12-23 13:00:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:48,168 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 532 transitions. [2020-12-23 13:00:48,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 532 transitions. [2020-12-23 13:00:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:48,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:48,169 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:48,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 13:00:48,384 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1715431007, now seen corresponding path program 37 times [2020-12-23 13:00:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:48,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295625916] [2020-12-23 13:00:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:48,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295625916] [2020-12-23 13:00:48,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667991889] [2020-12-23 13:00:48,463 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 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 13:00:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:48,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:48,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927423028] [2020-12-23 13:00:48,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:48,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:48,683 INFO L87 Difference]: Start difference. First operand 190 states and 532 transitions. Second operand 16 states. [2020-12-23 13:00:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:49,019 INFO L93 Difference]: Finished difference Result 263 states and 675 transitions. [2020-12-23 13:00:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:00:49,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:49,021 INFO L225 Difference]: With dead ends: 263 [2020-12-23 13:00:49,021 INFO L226 Difference]: Without dead ends: 258 [2020-12-23 13:00:49,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:00:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-23 13:00:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 192. [2020-12-23 13:00:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 13:00:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2020-12-23 13:00:49,029 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 13 [2020-12-23 13:00:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:49,029 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2020-12-23 13:00:49,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2020-12-23 13:00:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:49,030 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:49,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 13:00:49,231 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1715411539, now seen corresponding path program 38 times [2020-12-23 13:00:49,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:49,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583267657] [2020-12-23 13:00:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:49,328 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 13:00:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583267657] [2020-12-23 13:00:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025246887] [2020-12-23 13:00:49,329 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 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 13:00:49,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:49,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:49,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:49,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:49,541 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 13:00:49,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:49,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604419358] [2020-12-23 13:00:49,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:49,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:49,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:49,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:49,544 INFO L87 Difference]: Start difference. First operand 192 states and 539 transitions. Second operand 16 states. [2020-12-23 13:00:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:50,135 INFO L93 Difference]: Finished difference Result 309 states and 797 transitions. [2020-12-23 13:00:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:00:50,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:50,137 INFO L225 Difference]: With dead ends: 309 [2020-12-23 13:00:50,137 INFO L226 Difference]: Without dead ends: 290 [2020-12-23 13:00:50,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:00:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-23 13:00:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 186. [2020-12-23 13:00:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:00:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 525 transitions. [2020-12-23 13:00:50,143 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 525 transitions. Word has length 13 [2020-12-23 13:00:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:50,143 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 525 transitions. [2020-12-23 13:00:50,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 525 transitions. [2020-12-23 13:00:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:50,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:50,144 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:50,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:50,359 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2021527201, now seen corresponding path program 39 times [2020-12-23 13:00:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:50,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264636717] [2020-12-23 13:00:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,453 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 13:00:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264636717] [2020-12-23 13:00:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203348916] [2020-12-23 13:00:50,454 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 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 13:00:50,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:50,658 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 13:00:50,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:50,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478009823] [2020-12-23 13:00:50,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:50,660 INFO L87 Difference]: Start difference. First operand 186 states and 525 transitions. Second operand 16 states. [2020-12-23 13:00:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:50,903 INFO L93 Difference]: Finished difference Result 267 states and 696 transitions. [2020-12-23 13:00:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:50,904 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:50,906 INFO L225 Difference]: With dead ends: 267 [2020-12-23 13:00:50,906 INFO L226 Difference]: Without dead ends: 261 [2020-12-23 13:00:50,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-23 13:00:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 194. [2020-12-23 13:00:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 13:00:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 541 transitions. [2020-12-23 13:00:50,913 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 541 transitions. Word has length 13 [2020-12-23 13:00:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:50,913 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 541 transitions. [2020-12-23 13:00:50,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 541 transitions. [2020-12-23 13:00:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:50,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:50,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:51,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 13:00:51,129 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2021584861, now seen corresponding path program 40 times [2020-12-23 13:00:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:51,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65813632] [2020-12-23 13:00:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:51,220 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 13:00:51,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65813632] [2020-12-23 13:00:51,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179271075] [2020-12-23 13:00:51,221 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 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 13:00:51,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:51,397 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 13:00:51,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:51,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:51,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415088134] [2020-12-23 13:00:51,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:51,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:51,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:51,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:51,398 INFO L87 Difference]: Start difference. First operand 194 states and 541 transitions. Second operand 16 states. [2020-12-23 13:00:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:51,692 INFO L93 Difference]: Finished difference Result 261 states and 686 transitions. [2020-12-23 13:00:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:51,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:51,695 INFO L225 Difference]: With dead ends: 261 [2020-12-23 13:00:51,695 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 13:00:51,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 13:00:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 193. [2020-12-23 13:00:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 13:00:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 538 transitions. [2020-12-23 13:00:51,703 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 538 transitions. Word has length 13 [2020-12-23 13:00:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:51,703 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 538 transitions. [2020-12-23 13:00:51,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 538 transitions. [2020-12-23 13:00:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:51,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:51,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:51,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 13:00:51,918 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1798692869, now seen corresponding path program 41 times [2020-12-23 13:00:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:51,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763903284] [2020-12-23 13:00:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:51,993 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 13:00:51,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763903284] [2020-12-23 13:00:51,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583971344] [2020-12-23 13:00:51,994 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 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 13:00:52,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:52,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:52,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:52,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:52,173 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 13:00:52,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:52,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:52,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946300805] [2020-12-23 13:00:52,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:52,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:52,175 INFO L87 Difference]: Start difference. First operand 193 states and 538 transitions. Second operand 16 states. [2020-12-23 13:00:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:52,432 INFO L93 Difference]: Finished difference Result 282 states and 726 transitions. [2020-12-23 13:00:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:00:52,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:52,435 INFO L225 Difference]: With dead ends: 282 [2020-12-23 13:00:52,435 INFO L226 Difference]: Without dead ends: 276 [2020-12-23 13:00:52,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-23 13:00:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 195. [2020-12-23 13:00:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 13:00:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 543 transitions. [2020-12-23 13:00:52,441 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 543 transitions. Word has length 13 [2020-12-23 13:00:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:52,442 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 543 transitions. [2020-12-23 13:00:52,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 543 transitions. [2020-12-23 13:00:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:52,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:52,443 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:52,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 13:00:52,644 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1798750529, now seen corresponding path program 42 times [2020-12-23 13:00:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:52,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316740662] [2020-12-23 13:00:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:52,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316740662] [2020-12-23 13:00:52,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687304376] [2020-12-23 13:00:52,735 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 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 13:00:52,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:52,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:52,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:52,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:52,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082588882] [2020-12-23 13:00:52,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:52,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:52,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:52,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:52,911 INFO L87 Difference]: Start difference. First operand 195 states and 543 transitions. Second operand 16 states. [2020-12-23 13:00:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:53,192 INFO L93 Difference]: Finished difference Result 273 states and 709 transitions. [2020-12-23 13:00:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:00:53,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:53,194 INFO L225 Difference]: With dead ends: 273 [2020-12-23 13:00:53,194 INFO L226 Difference]: Without dead ends: 268 [2020-12-23 13:00:53,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-23 13:00:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 193. [2020-12-23 13:00:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 13:00:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 537 transitions. [2020-12-23 13:00:53,201 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 537 transitions. Word has length 13 [2020-12-23 13:00:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:53,201 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 537 transitions. [2020-12-23 13:00:53,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 537 transitions. [2020-12-23 13:00:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:53,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:53,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:53,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:53,417 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1817461199, now seen corresponding path program 43 times [2020-12-23 13:00:53,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:53,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535720745] [2020-12-23 13:00:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:53,504 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 13:00:53,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535720745] [2020-12-23 13:00:53,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946659870] [2020-12-23 13:00:53,505 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 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 13:00:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:53,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:53,685 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 13:00:53,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:53,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648777345] [2020-12-23 13:00:53,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:53,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:53,687 INFO L87 Difference]: Start difference. First operand 193 states and 537 transitions. Second operand 16 states. [2020-12-23 13:00:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:54,057 INFO L93 Difference]: Finished difference Result 279 states and 713 transitions. [2020-12-23 13:00:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:00:54,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:54,059 INFO L225 Difference]: With dead ends: 279 [2020-12-23 13:00:54,060 INFO L226 Difference]: Without dead ends: 273 [2020-12-23 13:00:54,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:00:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-23 13:00:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 194. [2020-12-23 13:00:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 13:00:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 539 transitions. [2020-12-23 13:00:54,066 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 539 transitions. Word has length 13 [2020-12-23 13:00:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:54,066 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 539 transitions. [2020-12-23 13:00:54,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 539 transitions. [2020-12-23 13:00:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:54,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:54,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:54,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:54,271 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1818124289, now seen corresponding path program 44 times [2020-12-23 13:00:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:54,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018595852] [2020-12-23 13:00:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:54,354 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 13:00:54,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018595852] [2020-12-23 13:00:54,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937250752] [2020-12-23 13:00:54,354 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 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 13:00:54,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:54,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:54,505 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 13:00:54,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:54,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123901429] [2020-12-23 13:00:54,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:54,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:54,507 INFO L87 Difference]: Start difference. First operand 194 states and 539 transitions. Second operand 16 states. [2020-12-23 13:00:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:54,949 INFO L93 Difference]: Finished difference Result 277 states and 711 transitions. [2020-12-23 13:00:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:00:54,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:54,953 INFO L225 Difference]: With dead ends: 277 [2020-12-23 13:00:54,953 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 13:00:54,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:00:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 13:00:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 197. [2020-12-23 13:00:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 13:00:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 551 transitions. [2020-12-23 13:00:54,959 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 551 transitions. Word has length 13 [2020-12-23 13:00:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:54,959 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 551 transitions. [2020-12-23 13:00:54,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 551 transitions. [2020-12-23 13:00:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:54,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:54,960 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:55,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:55,174 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1818143757, now seen corresponding path program 45 times [2020-12-23 13:00:55,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:55,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758259771] [2020-12-23 13:00:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:55,249 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 13:00:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758259771] [2020-12-23 13:00:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400630105] [2020-12-23 13:00:55,250 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 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 13:00:55,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:55,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:55,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:55,427 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 13:00:55,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:55,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:55,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149147228] [2020-12-23 13:00:55,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:55,429 INFO L87 Difference]: Start difference. First operand 197 states and 551 transitions. Second operand 16 states. [2020-12-23 13:00:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:55,993 INFO L93 Difference]: Finished difference Result 349 states and 898 transitions. [2020-12-23 13:00:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:00:55,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:55,997 INFO L225 Difference]: With dead ends: 349 [2020-12-23 13:00:55,997 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 13:00:55,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:00:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 13:00:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 194. [2020-12-23 13:00:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 13:00:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 546 transitions. [2020-12-23 13:00:56,003 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 546 transitions. Word has length 13 [2020-12-23 13:00:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:56,003 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 546 transitions. [2020-12-23 13:00:56,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 546 transitions. [2020-12-23 13:00:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:56,004 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:56,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:56,218 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1698987151, now seen corresponding path program 46 times [2020-12-23 13:00:56,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:56,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908917287] [2020-12-23 13:00:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:56,299 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 13:00:56,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908917287] [2020-12-23 13:00:56,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855299312] [2020-12-23 13:00:56,299 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 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 13:00:56,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:56,450 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 13:00:56,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:56,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:56,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538145510] [2020-12-23 13:00:56,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:56,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:56,452 INFO L87 Difference]: Start difference. First operand 194 states and 546 transitions. Second operand 16 states. [2020-12-23 13:00:56,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:56,589 INFO L93 Difference]: Finished difference Result 252 states and 673 transitions. [2020-12-23 13:00:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:56,589 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:56,591 INFO L225 Difference]: With dead ends: 252 [2020-12-23 13:00:56,591 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 13:00:56,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:00:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 13:00:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 197. [2020-12-23 13:00:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 13:00:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 554 transitions. [2020-12-23 13:00:56,597 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 554 transitions. Word has length 13 [2020-12-23 13:00:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:56,597 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 554 transitions. [2020-12-23 13:00:56,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 554 transitions. [2020-12-23 13:00:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:56,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:56,598 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:56,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 13:00:56,808 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1698989073, now seen corresponding path program 47 times [2020-12-23 13:00:56,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:56,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321046053] [2020-12-23 13:00:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:56,907 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 13:00:56,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321046053] [2020-12-23 13:00:56,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393785258] [2020-12-23 13:00:56,908 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 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 13:00:56,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:00:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:57,090 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 13:00:57,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:57,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761198775] [2020-12-23 13:00:57,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:57,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:57,092 INFO L87 Difference]: Start difference. First operand 197 states and 554 transitions. Second operand 16 states. [2020-12-23 13:00:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:57,310 INFO L93 Difference]: Finished difference Result 266 states and 706 transitions. [2020-12-23 13:00:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:57,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:57,313 INFO L225 Difference]: With dead ends: 266 [2020-12-23 13:00:57,313 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:00:57,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:00:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 200. [2020-12-23 13:00:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 13:00:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 562 transitions. [2020-12-23 13:00:57,317 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 562 transitions. Word has length 13 [2020-12-23 13:00:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:57,317 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 562 transitions. [2020-12-23 13:00:57,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 562 transitions. [2020-12-23 13:00:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:57,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:57,318 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:57,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:57,519 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1700893775, now seen corresponding path program 48 times [2020-12-23 13:00:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:57,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463403362] [2020-12-23 13:00:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463403362] [2020-12-23 13:00:57,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140722757] [2020-12-23 13:00:57,620 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 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 13:00:57,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:57,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:57,820 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 13:00:57,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:57,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:57,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672702092] [2020-12-23 13:00:57,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:57,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:57,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:57,822 INFO L87 Difference]: Start difference. First operand 200 states and 562 transitions. Second operand 16 states. [2020-12-23 13:00:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:57,964 INFO L93 Difference]: Finished difference Result 256 states and 687 transitions. [2020-12-23 13:00:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:57,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:57,966 INFO L225 Difference]: With dead ends: 256 [2020-12-23 13:00:57,967 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 13:00:57,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 13:00:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 202. [2020-12-23 13:00:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 13:00:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2020-12-23 13:00:57,975 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 13 [2020-12-23 13:00:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:57,975 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2020-12-23 13:00:57,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2020-12-23 13:00:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:57,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:57,976 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:58,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 13:00:58,192 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -913909845, now seen corresponding path program 49 times [2020-12-23 13:00:58,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:58,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985760259] [2020-12-23 13:00:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:58,269 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 13:00:58,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985760259] [2020-12-23 13:00:58,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429942156] [2020-12-23 13:00:58,271 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 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 13:00:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:58,447 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 13:00:58,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:58,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:58,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101725565] [2020-12-23 13:00:58,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:58,450 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand 16 states. [2020-12-23 13:00:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:58,645 INFO L93 Difference]: Finished difference Result 269 states and 707 transitions. [2020-12-23 13:00:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:58,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:58,647 INFO L225 Difference]: With dead ends: 269 [2020-12-23 13:00:58,647 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:00:58,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:00:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2020-12-23 13:00:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 13:00:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 570 transitions. [2020-12-23 13:00:58,654 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 570 transitions. Word has length 13 [2020-12-23 13:00:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:58,654 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 570 transitions. [2020-12-23 13:00:58,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 570 transitions. [2020-12-23 13:00:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:58,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:58,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:58,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:58,872 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -913907923, now seen corresponding path program 50 times [2020-12-23 13:00:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:58,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965221621] [2020-12-23 13:00:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:58,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965221621] [2020-12-23 13:00:58,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813427905] [2020-12-23 13:00:58,952 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 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 13:00:59,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:59,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:59,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:59,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:59,147 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 13:00:59,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:59,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:59,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41105726] [2020-12-23 13:00:59,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:59,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:59,149 INFO L87 Difference]: Start difference. First operand 203 states and 570 transitions. Second operand 16 states. [2020-12-23 13:00:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:59,398 INFO L93 Difference]: Finished difference Result 285 states and 744 transitions. [2020-12-23 13:00:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:59,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:59,401 INFO L225 Difference]: With dead ends: 285 [2020-12-23 13:00:59,401 INFO L226 Difference]: Without dead ends: 279 [2020-12-23 13:00:59,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:00:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-23 13:00:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 204. [2020-12-23 13:00:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 13:00:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 572 transitions. [2020-12-23 13:00:59,407 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 572 transitions. Word has length 13 [2020-12-23 13:00:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:59,407 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 572 transitions. [2020-12-23 13:00:59,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 572 transitions. [2020-12-23 13:00:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:59,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:59,408 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:59,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 13:00:59,622 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash -912003221, now seen corresponding path program 51 times [2020-12-23 13:00:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:59,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190133794] [2020-12-23 13:00:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:59,708 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 13:00:59,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190133794] [2020-12-23 13:00:59,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182694169] [2020-12-23 13:00:59,709 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 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 13:00:59,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:59,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:59,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:59,893 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 13:00:59,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:59,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:59,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613312855] [2020-12-23 13:00:59,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:59,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:59,895 INFO L87 Difference]: Start difference. First operand 204 states and 572 transitions. Second operand 16 states. [2020-12-23 13:01:00,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:00,086 INFO L93 Difference]: Finished difference Result 268 states and 708 transitions. [2020-12-23 13:01:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:01:00,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:00,089 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:01:00,089 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:01:00,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:01:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:01:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 200. [2020-12-23 13:01:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 13:01:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 562 transitions. [2020-12-23 13:01:00,095 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 562 transitions. Word has length 13 [2020-12-23 13:01:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:00,095 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 562 transitions. [2020-12-23 13:01:00,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 562 transitions. [2020-12-23 13:01:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:00,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:00,096 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:00,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:00,311 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash -332091615, now seen corresponding path program 52 times [2020-12-23 13:01:00,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:00,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125643253] [2020-12-23 13:01:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:00,381 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 13:01:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125643253] [2020-12-23 13:01:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414555065] [2020-12-23 13:01:00,382 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 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 13:01:00,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:00,572 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 13:01:00,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:00,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:00,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500164928] [2020-12-23 13:01:00,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:00,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:00,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:00,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:00,574 INFO L87 Difference]: Start difference. First operand 200 states and 562 transitions. Second operand 16 states. [2020-12-23 13:01:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:00,800 INFO L93 Difference]: Finished difference Result 267 states and 699 transitions. [2020-12-23 13:01:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:00,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:00,803 INFO L225 Difference]: With dead ends: 267 [2020-12-23 13:01:00,804 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 13:01:00,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:01:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 13:01:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 200. [2020-12-23 13:01:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 13:01:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 562 transitions. [2020-12-23 13:01:00,808 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 562 transitions. Word has length 13 [2020-12-23 13:01:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:00,809 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 562 transitions. [2020-12-23 13:01:00,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 562 transitions. [2020-12-23 13:01:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:00,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:00,809 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:01,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:01,011 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash -332089693, now seen corresponding path program 53 times [2020-12-23 13:01:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:01,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438187124] [2020-12-23 13:01:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:01,086 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 13:01:01,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438187124] [2020-12-23 13:01:01,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218623906] [2020-12-23 13:01:01,087 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 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 13:01:01,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:01,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:01,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:01,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771323439] [2020-12-23 13:01:01,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:01,279 INFO L87 Difference]: Start difference. First operand 200 states and 562 transitions. Second operand 16 states. [2020-12-23 13:01:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:01,575 INFO L93 Difference]: Finished difference Result 292 states and 756 transitions. [2020-12-23 13:01:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:01,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:01,578 INFO L225 Difference]: With dead ends: 292 [2020-12-23 13:01:01,578 INFO L226 Difference]: Without dead ends: 286 [2020-12-23 13:01:01,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-23 13:01:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 200. [2020-12-23 13:01:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 13:01:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 561 transitions. [2020-12-23 13:01:01,584 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 561 transitions. Word has length 13 [2020-12-23 13:01:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:01,585 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 561 transitions. [2020-12-23 13:01:01,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 561 transitions. [2020-12-23 13:01:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:01,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:01,586 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:01,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 13:01:01,798 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:01,799 INFO L82 PathProgramCache]: Analyzing trace with hash -313323285, now seen corresponding path program 54 times [2020-12-23 13:01:01,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:01,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886979899] [2020-12-23 13:01:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:01,877 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 13:01:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886979899] [2020-12-23 13:01:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52293336] [2020-12-23 13:01:01,878 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 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 13:01:01,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:01,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:02,078 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 13:01:02,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:02,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:02,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220449624] [2020-12-23 13:01:02,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:02,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:02,080 INFO L87 Difference]: Start difference. First operand 200 states and 561 transitions. Second operand 16 states. [2020-12-23 13:01:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:02,370 INFO L93 Difference]: Finished difference Result 278 states and 723 transitions. [2020-12-23 13:01:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:02,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:02,373 INFO L225 Difference]: With dead ends: 278 [2020-12-23 13:01:02,373 INFO L226 Difference]: Without dead ends: 274 [2020-12-23 13:01:02,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:01:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-23 13:01:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 201. [2020-12-23 13:01:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 13:01:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 566 transitions. [2020-12-23 13:01:02,379 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 566 transitions. Word has length 13 [2020-12-23 13:01:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:02,379 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 566 transitions. [2020-12-23 13:01:02,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 566 transitions. [2020-12-23 13:01:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:02,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:02,381 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:02,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:02,594 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash -313321363, now seen corresponding path program 55 times [2020-12-23 13:01:02,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:02,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297794910] [2020-12-23 13:01:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:02,674 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 13:01:02,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297794910] [2020-12-23 13:01:02,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470640606] [2020-12-23 13:01:02,674 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 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 13:01:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:02,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:02,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:02,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:02,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162555555] [2020-12-23 13:01:02,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:02,852 INFO L87 Difference]: Start difference. First operand 201 states and 566 transitions. Second operand 16 states. [2020-12-23 13:01:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:03,247 INFO L93 Difference]: Finished difference Result 289 states and 747 transitions. [2020-12-23 13:01:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:03,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:03,250 INFO L225 Difference]: With dead ends: 289 [2020-12-23 13:01:03,250 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 13:01:03,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 13:01:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 201. [2020-12-23 13:01:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 13:01:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 565 transitions. [2020-12-23 13:01:03,256 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 565 transitions. Word has length 13 [2020-12-23 13:01:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:03,256 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 565 transitions. [2020-12-23 13:01:03,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 565 transitions. [2020-12-23 13:01:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:03,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:03,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:03,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:03,471 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash -312717855, now seen corresponding path program 56 times [2020-12-23 13:01:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:03,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904343721] [2020-12-23 13:01:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:03,540 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 13:01:03,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904343721] [2020-12-23 13:01:03,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973739398] [2020-12-23 13:01:03,540 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 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 13:01:03,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:03,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:03,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:03,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:03,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316583040] [2020-12-23 13:01:03,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:03,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:03,723 INFO L87 Difference]: Start difference. First operand 201 states and 565 transitions. Second operand 16 states. [2020-12-23 13:01:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:04,015 INFO L93 Difference]: Finished difference Result 266 states and 694 transitions. [2020-12-23 13:01:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:04,016 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:04,018 INFO L225 Difference]: With dead ends: 266 [2020-12-23 13:01:04,018 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:01:04,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:01:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 203. [2020-12-23 13:01:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 13:01:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 572 transitions. [2020-12-23 13:01:04,024 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 572 transitions. Word has length 13 [2020-12-23 13:01:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:04,024 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 572 transitions. [2020-12-23 13:01:04,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 572 transitions. [2020-12-23 13:01:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:04,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:04,025 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:04,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 13:01:04,239 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash -312698387, now seen corresponding path program 57 times [2020-12-23 13:01:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:04,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791609738] [2020-12-23 13:01:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:04,313 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 13:01:04,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791609738] [2020-12-23 13:01:04,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969675837] [2020-12-23 13:01:04,314 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 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 13:01:04,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:04,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:01:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:04,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:04,492 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 13:01:04,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:04,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:04,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620838606] [2020-12-23 13:01:04,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:04,495 INFO L87 Difference]: Start difference. First operand 203 states and 572 transitions. Second operand 16 states. [2020-12-23 13:01:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:04,918 INFO L93 Difference]: Finished difference Result 306 states and 795 transitions. [2020-12-23 13:01:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:04,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:04,921 INFO L225 Difference]: With dead ends: 306 [2020-12-23 13:01:04,921 INFO L226 Difference]: Without dead ends: 286 [2020-12-23 13:01:04,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:01:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-23 13:01:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 200. [2020-12-23 13:01:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 13:01:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 558 transitions. [2020-12-23 13:01:04,927 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 558 transitions. Word has length 13 [2020-12-23 13:01:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:04,927 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 558 transitions. [2020-12-23 13:01:04,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 558 transitions. [2020-12-23 13:01:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:04,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:04,928 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:05,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:05,142 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash -312658273, now seen corresponding path program 58 times [2020-12-23 13:01:05,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:05,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6707967] [2020-12-23 13:01:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:05,216 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 13:01:05,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6707967] [2020-12-23 13:01:05,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840339542] [2020-12-23 13:01:05,217 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 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 13:01:05,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:05,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:05,411 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 13:01:05,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:05,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:05,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692166234] [2020-12-23 13:01:05,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:05,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:05,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:05,413 INFO L87 Difference]: Start difference. First operand 200 states and 558 transitions. Second operand 16 states. [2020-12-23 13:01:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:05,909 INFO L93 Difference]: Finished difference Result 287 states and 743 transitions. [2020-12-23 13:01:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:05,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:05,912 INFO L225 Difference]: With dead ends: 287 [2020-12-23 13:01:05,913 INFO L226 Difference]: Without dead ends: 281 [2020-12-23 13:01:05,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-23 13:01:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 203. [2020-12-23 13:01:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 13:01:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 570 transitions. [2020-12-23 13:01:05,919 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 570 transitions. Word has length 13 [2020-12-23 13:01:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:05,919 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 570 transitions. [2020-12-23 13:01:05,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 570 transitions. [2020-12-23 13:01:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:05,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:05,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:06,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 13:01:06,134 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:06,135 INFO L82 PathProgramCache]: Analyzing trace with hash -312638805, now seen corresponding path program 59 times [2020-12-23 13:01:06,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:06,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573923205] [2020-12-23 13:01:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:06,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573923205] [2020-12-23 13:01:06,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158460579] [2020-12-23 13:01:06,231 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 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 13:01:06,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:06,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:06,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:06,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:06,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:06,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:06,428 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 13:01:06,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:06,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939686022] [2020-12-23 13:01:06,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:06,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:06,430 INFO L87 Difference]: Start difference. First operand 203 states and 570 transitions. Second operand 16 states. [2020-12-23 13:01:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:07,148 INFO L93 Difference]: Finished difference Result 359 states and 921 transitions. [2020-12-23 13:01:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:01:07,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:07,151 INFO L225 Difference]: With dead ends: 359 [2020-12-23 13:01:07,151 INFO L226 Difference]: Without dead ends: 341 [2020-12-23 13:01:07,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=939, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:01:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-23 13:01:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 201. [2020-12-23 13:01:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 13:01:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 558 transitions. [2020-12-23 13:01:07,157 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 558 transitions. Word has length 13 [2020-12-23 13:01:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:07,158 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 558 transitions. [2020-12-23 13:01:07,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 558 transitions. [2020-12-23 13:01:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:07,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:07,159 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:07,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 13:01:07,368 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash -310789841, now seen corresponding path program 60 times [2020-12-23 13:01:07,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:07,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354239135] [2020-12-23 13:01:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:07,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354239135] [2020-12-23 13:01:07,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388645147] [2020-12-23 13:01:07,469 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 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 13:01:07,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:07,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:01:07,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:07,658 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 13:01:07,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:07,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284279073] [2020-12-23 13:01:07,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:07,661 INFO L87 Difference]: Start difference. First operand 201 states and 558 transitions. Second operand 16 states. [2020-12-23 13:01:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:08,326 INFO L93 Difference]: Finished difference Result 355 states and 904 transitions. [2020-12-23 13:01:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:01:08,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:08,329 INFO L225 Difference]: With dead ends: 355 [2020-12-23 13:01:08,329 INFO L226 Difference]: Without dead ends: 337 [2020-12-23 13:01:08,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=923, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:01:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-23 13:01:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 200. [2020-12-23 13:01:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 13:01:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 558 transitions. [2020-12-23 13:01:08,335 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 558 transitions. Word has length 13 [2020-12-23 13:01:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:08,335 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 558 transitions. [2020-12-23 13:01:08,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 558 transitions. [2020-12-23 13:01:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:08,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:08,336 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:08,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 13:01:08,551 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash -274773731, now seen corresponding path program 61 times [2020-12-23 13:01:08,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:08,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91209062] [2020-12-23 13:01:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:08,624 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 13:01:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91209062] [2020-12-23 13:01:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171703602] [2020-12-23 13:01:08,625 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 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 13:01:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:08,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:08,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:08,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546366081] [2020-12-23 13:01:08,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:08,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:08,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:08,812 INFO L87 Difference]: Start difference. First operand 200 states and 558 transitions. Second operand 16 states. [2020-12-23 13:01:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:09,000 INFO L93 Difference]: Finished difference Result 272 states and 720 transitions. [2020-12-23 13:01:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:09,000 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:09,003 INFO L225 Difference]: With dead ends: 272 [2020-12-23 13:01:09,003 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 13:01:09,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:01:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 13:01:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2020-12-23 13:01:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 13:01:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 553 transitions. [2020-12-23 13:01:09,010 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 553 transitions. Word has length 13 [2020-12-23 13:01:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:09,010 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 553 transitions. [2020-12-23 13:01:09,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 553 transitions. [2020-12-23 13:01:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:09,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:09,011 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:09,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:09,225 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -254217941, now seen corresponding path program 62 times [2020-12-23 13:01:09,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:09,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036828696] [2020-12-23 13:01:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:09,295 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 13:01:09,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036828696] [2020-12-23 13:01:09,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216308267] [2020-12-23 13:01:09,296 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 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 13:01:09,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:09,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:09,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:09,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:09,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:09,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379390546] [2020-12-23 13:01:09,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:09,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:09,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:09,480 INFO L87 Difference]: Start difference. First operand 198 states and 553 transitions. Second operand 16 states. [2020-12-23 13:01:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:09,691 INFO L93 Difference]: Finished difference Result 271 states and 714 transitions. [2020-12-23 13:01:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:09,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:09,694 INFO L225 Difference]: With dead ends: 271 [2020-12-23 13:01:09,694 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:01:09,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:01:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:01:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 196. [2020-12-23 13:01:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 13:01:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 548 transitions. [2020-12-23 13:01:09,700 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 548 transitions. Word has length 13 [2020-12-23 13:01:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:09,700 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 548 transitions. [2020-12-23 13:01:09,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 548 transitions. [2020-12-23 13:01:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:09,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:09,701 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:09,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:09,902 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash -253612511, now seen corresponding path program 63 times [2020-12-23 13:01:09,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:09,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786601949] [2020-12-23 13:01:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:09,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786601949] [2020-12-23 13:01:09,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551610504] [2020-12-23 13:01:09,982 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 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 13:01:10,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:10,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:10,185 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 13:01:10,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:10,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:10,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096191485] [2020-12-23 13:01:10,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:10,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:10,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:10,187 INFO L87 Difference]: Start difference. First operand 196 states and 548 transitions. Second operand 16 states. [2020-12-23 13:01:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:10,457 INFO L93 Difference]: Finished difference Result 263 states and 699 transitions. [2020-12-23 13:01:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:10,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:10,460 INFO L225 Difference]: With dead ends: 263 [2020-12-23 13:01:10,460 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 13:01:10,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 13:01:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 198. [2020-12-23 13:01:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 13:01:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 555 transitions. [2020-12-23 13:01:10,466 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 555 transitions. Word has length 13 [2020-12-23 13:01:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:10,466 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 555 transitions. [2020-12-23 13:01:10,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 555 transitions. [2020-12-23 13:01:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:10,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:10,467 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:10,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:10,681 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -253593043, now seen corresponding path program 64 times [2020-12-23 13:01:10,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:10,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44222956] [2020-12-23 13:01:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44222956] [2020-12-23 13:01:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601430261] [2020-12-23 13:01:10,760 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 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 13:01:10,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:10,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:10,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:10,943 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 13:01:10,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:10,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:10,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502229013] [2020-12-23 13:01:10,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:10,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:10,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:10,945 INFO L87 Difference]: Start difference. First operand 198 states and 555 transitions. Second operand 16 states. [2020-12-23 13:01:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:11,330 INFO L93 Difference]: Finished difference Result 336 states and 866 transitions. [2020-12-23 13:01:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:11,330 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:11,332 INFO L225 Difference]: With dead ends: 336 [2020-12-23 13:01:11,333 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 13:01:11,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 13:01:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 198. [2020-12-23 13:01:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 13:01:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 556 transitions. [2020-12-23 13:01:11,337 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 556 transitions. Word has length 13 [2020-12-23 13:01:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:11,337 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 556 transitions. [2020-12-23 13:01:11,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 556 transitions. [2020-12-23 13:01:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:11,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:11,338 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:11,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:11,540 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1536124564, now seen corresponding path program 15 times [2020-12-23 13:01:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:11,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052103655] [2020-12-23 13:01:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:11,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052103655] [2020-12-23 13:01:11,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823473046] [2020-12-23 13:01:11,582 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 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 13:01:11,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:01:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 13:01:11,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:11,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 13:01:11,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-12-23 13:01:11,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216306375] [2020-12-23 13:01:11,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:01:11,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:01:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:01:11,647 INFO L87 Difference]: Start difference. First operand 198 states and 556 transitions. Second operand 8 states. [2020-12-23 13:01:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:11,669 INFO L93 Difference]: Finished difference Result 282 states and 777 transitions. [2020-12-23 13:01:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:01:11,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 13:01:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:11,671 INFO L225 Difference]: With dead ends: 282 [2020-12-23 13:01:11,671 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 13:01:11,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:01:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 13:01:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-12-23 13:01:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 13:01:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 714 transitions. [2020-12-23 13:01:11,678 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 714 transitions. Word has length 13 [2020-12-23 13:01:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:11,678 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 714 transitions. [2020-12-23 13:01:11,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:01:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 714 transitions. [2020-12-23 13:01:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:11,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:11,679 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:11,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-23 13:01:11,880 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2009124029, now seen corresponding path program 65 times [2020-12-23 13:01:11,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:11,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114964557] [2020-12-23 13:01:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:11,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114964557] [2020-12-23 13:01:11,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955208353] [2020-12-23 13:01:11,969 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 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 13:01:12,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:12,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:12,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:12,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173797787] [2020-12-23 13:01:12,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:12,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:12,186 INFO L87 Difference]: Start difference. First operand 259 states and 714 transitions. Second operand 17 states. [2020-12-23 13:01:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:12,364 INFO L93 Difference]: Finished difference Result 285 states and 764 transitions. [2020-12-23 13:01:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:12,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:12,368 INFO L225 Difference]: With dead ends: 285 [2020-12-23 13:01:12,368 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 13:01:12,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:01:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 13:01:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 259. [2020-12-23 13:01:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 13:01:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 714 transitions. [2020-12-23 13:01:12,375 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 714 transitions. Word has length 14 [2020-12-23 13:01:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:12,375 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 714 transitions. [2020-12-23 13:01:12,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 714 transitions. [2020-12-23 13:01:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:12,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:12,376 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:12,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:12,590 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:12,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2008843169, now seen corresponding path program 66 times [2020-12-23 13:01:12,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:12,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610444113] [2020-12-23 13:01:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:12,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610444113] [2020-12-23 13:01:12,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823849247] [2020-12-23 13:01:12,701 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 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 13:01:12,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:12,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:12,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:12,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:12,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:12,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:12,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244915886] [2020-12-23 13:01:12,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:12,930 INFO L87 Difference]: Start difference. First operand 259 states and 714 transitions. Second operand 18 states. [2020-12-23 13:01:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:13,371 INFO L93 Difference]: Finished difference Result 359 states and 929 transitions. [2020-12-23 13:01:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:13,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:13,374 INFO L225 Difference]: With dead ends: 359 [2020-12-23 13:01:13,374 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 13:01:13,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:01:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 13:01:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 256. [2020-12-23 13:01:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-23 13:01:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 714 transitions. [2020-12-23 13:01:13,382 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 714 transitions. Word has length 14 [2020-12-23 13:01:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:13,382 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 714 transitions. [2020-12-23 13:01:13,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 714 transitions. [2020-12-23 13:01:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:13,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:13,383 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:13,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:13,584 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:13,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1147189887, now seen corresponding path program 67 times [2020-12-23 13:01:13,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:13,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33541848] [2020-12-23 13:01:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:13,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33541848] [2020-12-23 13:01:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030125262] [2020-12-23 13:01:13,673 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 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 13:01:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:13,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:13,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:13,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:13,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27949497] [2020-12-23 13:01:13,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:13,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:13,957 INFO L87 Difference]: Start difference. First operand 256 states and 714 transitions. Second operand 17 states. [2020-12-23 13:01:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:14,286 INFO L93 Difference]: Finished difference Result 348 states and 906 transitions. [2020-12-23 13:01:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:14,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:14,289 INFO L225 Difference]: With dead ends: 348 [2020-12-23 13:01:14,289 INFO L226 Difference]: Without dead ends: 344 [2020-12-23 13:01:14,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:01:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-12-23 13:01:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 261. [2020-12-23 13:01:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 13:01:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 723 transitions. [2020-12-23 13:01:14,296 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 723 transitions. Word has length 14 [2020-12-23 13:01:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:14,297 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 723 transitions. [2020-12-23 13:01:14,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 723 transitions. [2020-12-23 13:01:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:14,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:14,298 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:14,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:14,513 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash -877283427, now seen corresponding path program 68 times [2020-12-23 13:01:14,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:14,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695833966] [2020-12-23 13:01:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:14,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695833966] [2020-12-23 13:01:14,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846003614] [2020-12-23 13:01:14,600 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 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 13:01:14,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:14,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:14,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:14,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529242070] [2020-12-23 13:01:14,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:14,878 INFO L87 Difference]: Start difference. First operand 261 states and 723 transitions. Second operand 17 states. [2020-12-23 13:01:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:15,243 INFO L93 Difference]: Finished difference Result 354 states and 916 transitions. [2020-12-23 13:01:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:15,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:15,247 INFO L225 Difference]: With dead ends: 354 [2020-12-23 13:01:15,248 INFO L226 Difference]: Without dead ends: 350 [2020-12-23 13:01:15,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-12-23 13:01:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 263. [2020-12-23 13:01:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 13:01:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 730 transitions. [2020-12-23 13:01:15,255 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 730 transitions. Word has length 14 [2020-12-23 13:01:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:15,256 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 730 transitions. [2020-12-23 13:01:15,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 730 transitions. [2020-12-23 13:01:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:15,257 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:15,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:15,471 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash -876677997, now seen corresponding path program 69 times [2020-12-23 13:01:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:15,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085943346] [2020-12-23 13:01:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085943346] [2020-12-23 13:01:15,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545261555] [2020-12-23 13:01:15,560 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 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 13:01:15,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:15,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:15,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:15,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486394589] [2020-12-23 13:01:15,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:15,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:15,837 INFO L87 Difference]: Start difference. First operand 263 states and 730 transitions. Second operand 17 states. [2020-12-23 13:01:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:16,347 INFO L93 Difference]: Finished difference Result 358 states and 932 transitions. [2020-12-23 13:01:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:16,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:16,350 INFO L225 Difference]: With dead ends: 358 [2020-12-23 13:01:16,350 INFO L226 Difference]: Without dead ends: 354 [2020-12-23 13:01:16,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-23 13:01:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 267. [2020-12-23 13:01:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 13:01:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 744 transitions. [2020-12-23 13:01:16,357 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 744 transitions. Word has length 14 [2020-12-23 13:01:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:16,358 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 744 transitions. [2020-12-23 13:01:16,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 744 transitions. [2020-12-23 13:01:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:16,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:16,358 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:16,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-23 13:01:16,559 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash -876658529, now seen corresponding path program 70 times [2020-12-23 13:01:16,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:16,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887633233] [2020-12-23 13:01:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887633233] [2020-12-23 13:01:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648231319] [2020-12-23 13:01:16,654 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 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 13:01:16,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:16,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:16,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:16,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:16,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:16,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:16,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:16,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:16,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776309961] [2020-12-23 13:01:16,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:16,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:16,898 INFO L87 Difference]: Start difference. First operand 267 states and 744 transitions. Second operand 17 states. [2020-12-23 13:01:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:17,551 INFO L93 Difference]: Finished difference Result 313 states and 825 transitions. [2020-12-23 13:01:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:17,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:17,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:17,553 INFO L225 Difference]: With dead ends: 313 [2020-12-23 13:01:17,553 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 13:01:17,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:01:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 13:01:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 267. [2020-12-23 13:01:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 13:01:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 742 transitions. [2020-12-23 13:01:17,559 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 742 transitions. Word has length 14 [2020-12-23 13:01:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:17,559 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 742 transitions. [2020-12-23 13:01:17,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 742 transitions. [2020-12-23 13:01:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:17,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:17,560 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:17,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-23 13:01:17,761 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -876656607, now seen corresponding path program 71 times [2020-12-23 13:01:17,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:17,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502364099] [2020-12-23 13:01:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:17,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502364099] [2020-12-23 13:01:17,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94781520] [2020-12-23 13:01:17,856 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 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 13:01:17,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:17,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:18,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:18,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:18,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:18,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:18,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:18,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090406752] [2020-12-23 13:01:18,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:18,127 INFO L87 Difference]: Start difference. First operand 267 states and 742 transitions. Second operand 18 states. [2020-12-23 13:01:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:18,893 INFO L93 Difference]: Finished difference Result 458 states and 1173 transitions. [2020-12-23 13:01:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:01:18,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:18,896 INFO L225 Difference]: With dead ends: 458 [2020-12-23 13:01:18,896 INFO L226 Difference]: Without dead ends: 443 [2020-12-23 13:01:18,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:01:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-12-23 13:01:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 265. [2020-12-23 13:01:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-23 13:01:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 747 transitions. [2020-12-23 13:01:18,904 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 747 transitions. Word has length 14 [2020-12-23 13:01:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:18,904 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 747 transitions. [2020-12-23 13:01:18,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 747 transitions. [2020-12-23 13:01:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:18,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:18,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:19,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:19,112 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1434629425, now seen corresponding path program 72 times [2020-12-23 13:01:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:19,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449037807] [2020-12-23 13:01:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:19,211 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 13:01:19,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449037807] [2020-12-23 13:01:19,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884534670] [2020-12-23 13:01:19,212 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 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 13:01:19,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:19,490 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 13:01:19,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:19,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913085653] [2020-12-23 13:01:19,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:19,491 INFO L87 Difference]: Start difference. First operand 265 states and 747 transitions. Second operand 17 states. [2020-12-23 13:01:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:19,886 INFO L93 Difference]: Finished difference Result 378 states and 989 transitions. [2020-12-23 13:01:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:19,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:19,889 INFO L225 Difference]: With dead ends: 378 [2020-12-23 13:01:19,889 INFO L226 Difference]: Without dead ends: 373 [2020-12-23 13:01:19,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-23 13:01:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 271. [2020-12-23 13:01:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 13:01:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 759 transitions. [2020-12-23 13:01:19,895 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 759 transitions. Word has length 14 [2020-12-23 13:01:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:19,895 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 759 transitions. [2020-12-23 13:01:19,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 759 transitions. [2020-12-23 13:01:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:19,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:19,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:20,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:20,118 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1657463757, now seen corresponding path program 73 times [2020-12-23 13:01:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:20,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228696234] [2020-12-23 13:01:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228696234] [2020-12-23 13:01:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10968744] [2020-12-23 13:01:20,211 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 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 13:01:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:20,469 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 13:01:20,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:20,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612755132] [2020-12-23 13:01:20,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:20,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:20,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:20,471 INFO L87 Difference]: Start difference. First operand 271 states and 759 transitions. Second operand 17 states. [2020-12-23 13:01:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:20,911 INFO L93 Difference]: Finished difference Result 374 states and 984 transitions. [2020-12-23 13:01:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:20,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:20,913 INFO L225 Difference]: With dead ends: 374 [2020-12-23 13:01:20,913 INFO L226 Difference]: Without dead ends: 369 [2020-12-23 13:01:20,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-12-23 13:01:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 271. [2020-12-23 13:01:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 13:01:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 758 transitions. [2020-12-23 13:01:20,919 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 758 transitions. Word has length 14 [2020-12-23 13:01:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:20,919 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 758 transitions. [2020-12-23 13:01:20,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 758 transitions. [2020-12-23 13:01:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:20,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:20,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:21,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:21,121 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1636907967, now seen corresponding path program 74 times [2020-12-23 13:01:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:21,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35579260] [2020-12-23 13:01:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:21,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35579260] [2020-12-23 13:01:21,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634344710] [2020-12-23 13:01:21,212 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 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 13:01:21,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:21,475 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 13:01:21,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:21,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:21,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473575211] [2020-12-23 13:01:21,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:21,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:21,477 INFO L87 Difference]: Start difference. First operand 271 states and 758 transitions. Second operand 17 states. [2020-12-23 13:01:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:22,030 INFO L93 Difference]: Finished difference Result 390 states and 1019 transitions. [2020-12-23 13:01:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:22,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:22,032 INFO L225 Difference]: With dead ends: 390 [2020-12-23 13:01:22,032 INFO L226 Difference]: Without dead ends: 385 [2020-12-23 13:01:22,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:01:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-12-23 13:01:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 273. [2020-12-23 13:01:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-23 13:01:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 765 transitions. [2020-12-23 13:01:22,039 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 765 transitions. Word has length 14 [2020-12-23 13:01:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:22,039 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 765 transitions. [2020-12-23 13:01:22,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 765 transitions. [2020-12-23 13:01:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:22,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:22,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:22,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:22,241 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:22,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1636302537, now seen corresponding path program 75 times [2020-12-23 13:01:22,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:22,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555507005] [2020-12-23 13:01:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:22,346 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 13:01:22,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555507005] [2020-12-23 13:01:22,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545156683] [2020-12-23 13:01:22,347 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 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 13:01:22,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:22,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:22,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:22,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862301950] [2020-12-23 13:01:22,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:22,605 INFO L87 Difference]: Start difference. First operand 273 states and 765 transitions. Second operand 17 states. [2020-12-23 13:01:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:23,216 INFO L93 Difference]: Finished difference Result 385 states and 1005 transitions. [2020-12-23 13:01:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:23,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:23,218 INFO L225 Difference]: With dead ends: 385 [2020-12-23 13:01:23,219 INFO L226 Difference]: Without dead ends: 380 [2020-12-23 13:01:23,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:01:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-23 13:01:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 277. [2020-12-23 13:01:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 13:01:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 779 transitions. [2020-12-23 13:01:23,226 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 779 transitions. Word has length 14 [2020-12-23 13:01:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:23,227 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 779 transitions. [2020-12-23 13:01:23,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 779 transitions. [2020-12-23 13:01:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:23,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:23,228 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:23,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:23,438 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1636283069, now seen corresponding path program 76 times [2020-12-23 13:01:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:23,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969233527] [2020-12-23 13:01:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:23,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969233527] [2020-12-23 13:01:23,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204708148] [2020-12-23 13:01:23,532 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 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 13:01:23,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:23,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:23,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:23,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:23,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:23,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:23,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:23,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597057334] [2020-12-23 13:01:23,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:23,785 INFO L87 Difference]: Start difference. First operand 277 states and 779 transitions. Second operand 17 states. [2020-12-23 13:01:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:24,729 INFO L93 Difference]: Finished difference Result 369 states and 967 transitions. [2020-12-23 13:01:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:24,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:24,731 INFO L225 Difference]: With dead ends: 369 [2020-12-23 13:01:24,731 INFO L226 Difference]: Without dead ends: 356 [2020-12-23 13:01:24,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:01:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-23 13:01:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 281. [2020-12-23 13:01:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 13:01:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 796 transitions. [2020-12-23 13:01:24,740 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 796 transitions. Word has length 14 [2020-12-23 13:01:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:24,740 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 796 transitions. [2020-12-23 13:01:24,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 796 transitions. [2020-12-23 13:01:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:24,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:24,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:24,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:24,945 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1636281147, now seen corresponding path program 77 times [2020-12-23 13:01:24,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:24,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2454868] [2020-12-23 13:01:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:25,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2454868] [2020-12-23 13:01:25,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107371368] [2020-12-23 13:01:25,047 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 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 13:01:25,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:25,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:25,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:25,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:25,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:25,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:25,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:25,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:25,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:25,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:25,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:25,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:25,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226193836] [2020-12-23 13:01:25,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:25,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:25,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:25,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:25,391 INFO L87 Difference]: Start difference. First operand 281 states and 796 transitions. Second operand 18 states. [2020-12-23 13:01:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:26,514 INFO L93 Difference]: Finished difference Result 496 states and 1274 transitions. [2020-12-23 13:01:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:01:26,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:26,517 INFO L225 Difference]: With dead ends: 496 [2020-12-23 13:01:26,517 INFO L226 Difference]: Without dead ends: 480 [2020-12-23 13:01:26,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:01:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-12-23 13:01:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 278. [2020-12-23 13:01:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 13:01:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 799 transitions. [2020-12-23 13:01:26,525 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 799 transitions. Word has length 14 [2020-12-23 13:01:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:26,525 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 799 transitions. [2020-12-23 13:01:26,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 799 transitions. [2020-12-23 13:01:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:26,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:26,526 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:26,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:26,727 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1757227135, now seen corresponding path program 78 times [2020-12-23 13:01:26,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:26,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552842744] [2020-12-23 13:01:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:26,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552842744] [2020-12-23 13:01:26,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895552757] [2020-12-23 13:01:26,848 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 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 13:01:26,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:27,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:27,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:27,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334580236] [2020-12-23 13:01:27,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:27,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:27,082 INFO L87 Difference]: Start difference. First operand 278 states and 799 transitions. Second operand 17 states. [2020-12-23 13:01:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:27,523 INFO L93 Difference]: Finished difference Result 374 states and 994 transitions. [2020-12-23 13:01:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:27,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:27,525 INFO L225 Difference]: With dead ends: 374 [2020-12-23 13:01:27,525 INFO L226 Difference]: Without dead ends: 371 [2020-12-23 13:01:27,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-23 13:01:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 279. [2020-12-23 13:01:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 13:01:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 802 transitions. [2020-12-23 13:01:27,534 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 802 transitions. Word has length 14 [2020-12-23 13:01:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:27,534 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 802 transitions. [2020-12-23 13:01:27,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 802 transitions. [2020-12-23 13:01:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:27,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:27,535 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:27,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-23 13:01:27,750 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1757225213, now seen corresponding path program 79 times [2020-12-23 13:01:27,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:27,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779971177] [2020-12-23 13:01:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:27,851 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 13:01:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779971177] [2020-12-23 13:01:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104957167] [2020-12-23 13:01:27,852 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 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 13:01:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:27,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:27,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:28,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:28,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215099031] [2020-12-23 13:01:28,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:28,082 INFO L87 Difference]: Start difference. First operand 279 states and 802 transitions. Second operand 17 states. [2020-12-23 13:01:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:28,506 INFO L93 Difference]: Finished difference Result 399 states and 1052 transitions. [2020-12-23 13:01:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:28,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:28,508 INFO L225 Difference]: With dead ends: 399 [2020-12-23 13:01:28,509 INFO L226 Difference]: Without dead ends: 394 [2020-12-23 13:01:28,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-23 13:01:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 281. [2020-12-23 13:01:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 13:01:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 808 transitions. [2020-12-23 13:01:28,516 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 808 transitions. Word has length 14 [2020-12-23 13:01:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:28,517 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 808 transitions. [2020-12-23 13:01:28,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 808 transitions. [2020-12-23 13:01:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:28,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:28,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:28,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:28,730 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1755380093, now seen corresponding path program 80 times [2020-12-23 13:01:28,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:28,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786283540] [2020-12-23 13:01:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:28,845 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 13:01:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786283540] [2020-12-23 13:01:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31778658] [2020-12-23 13:01:28,845 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 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 13:01:28,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:28,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:29,082 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 13:01:29,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:29,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424297231] [2020-12-23 13:01:29,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:29,084 INFO L87 Difference]: Start difference. First operand 281 states and 808 transitions. Second operand 17 states. [2020-12-23 13:01:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:29,597 INFO L93 Difference]: Finished difference Result 398 states and 1053 transitions. [2020-12-23 13:01:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:29,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:29,599 INFO L225 Difference]: With dead ends: 398 [2020-12-23 13:01:29,599 INFO L226 Difference]: Without dead ends: 393 [2020-12-23 13:01:29,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=567, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:29,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-23 13:01:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 282. [2020-12-23 13:01:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-23 13:01:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 811 transitions. [2020-12-23 13:01:29,607 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 811 transitions. Word has length 14 [2020-12-23 13:01:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:29,607 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 811 transitions. [2020-12-23 13:01:29,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 811 transitions. [2020-12-23 13:01:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:29,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:29,609 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:29,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-23 13:01:29,817 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1755318589, now seen corresponding path program 81 times [2020-12-23 13:01:29,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:29,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203172772] [2020-12-23 13:01:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:29,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203172772] [2020-12-23 13:01:29,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855996879] [2020-12-23 13:01:29,920 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 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 13:01:30,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:30,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:30,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:30,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:30,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:30,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395329472] [2020-12-23 13:01:30,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:30,215 INFO L87 Difference]: Start difference. First operand 282 states and 811 transitions. Second operand 17 states. [2020-12-23 13:01:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:30,581 INFO L93 Difference]: Finished difference Result 376 states and 999 transitions. [2020-12-23 13:01:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:30,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:30,584 INFO L225 Difference]: With dead ends: 376 [2020-12-23 13:01:30,584 INFO L226 Difference]: Without dead ends: 353 [2020-12-23 13:01:30,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:01:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-12-23 13:01:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 287. [2020-12-23 13:01:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:01:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 813 transitions. [2020-12-23 13:01:30,593 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 813 transitions. Word has length 14 [2020-12-23 13:01:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:30,594 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 813 transitions. [2020-12-23 13:01:30,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 813 transitions. [2020-12-23 13:01:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:30,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:30,595 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:30,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:30,807 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash -75156835, now seen corresponding path program 82 times [2020-12-23 13:01:30,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:30,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429961857] [2020-12-23 13:01:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429961857] [2020-12-23 13:01:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197085468] [2020-12-23 13:01:30,913 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 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 13:01:30,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:30,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:30,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:31,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:31,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:31,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095615808] [2020-12-23 13:01:31,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:31,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:31,124 INFO L87 Difference]: Start difference. First operand 287 states and 813 transitions. Second operand 17 states. [2020-12-23 13:01:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:31,548 INFO L93 Difference]: Finished difference Result 388 states and 1019 transitions. [2020-12-23 13:01:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:31,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:31,550 INFO L225 Difference]: With dead ends: 388 [2020-12-23 13:01:31,550 INFO L226 Difference]: Without dead ends: 385 [2020-12-23 13:01:31,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-12-23 13:01:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 287. [2020-12-23 13:01:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:01:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 813 transitions. [2020-12-23 13:01:31,557 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 813 transitions. Word has length 14 [2020-12-23 13:01:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:31,558 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 813 transitions. [2020-12-23 13:01:31,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 813 transitions. [2020-12-23 13:01:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:31,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:31,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:31,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-23 13:01:31,773 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:31,774 INFO L82 PathProgramCache]: Analyzing trace with hash -75154913, now seen corresponding path program 83 times [2020-12-23 13:01:31,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:31,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012524508] [2020-12-23 13:01:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:31,862 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 13:01:31,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012524508] [2020-12-23 13:01:31,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220544975] [2020-12-23 13:01:31,862 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 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 13:01:31,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:31,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:32,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:32,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574078155] [2020-12-23 13:01:32,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:32,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:32,084 INFO L87 Difference]: Start difference. First operand 287 states and 813 transitions. Second operand 17 states. [2020-12-23 13:01:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:32,516 INFO L93 Difference]: Finished difference Result 409 states and 1071 transitions. [2020-12-23 13:01:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:32,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:32,518 INFO L225 Difference]: With dead ends: 409 [2020-12-23 13:01:32,518 INFO L226 Difference]: Without dead ends: 404 [2020-12-23 13:01:32,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-12-23 13:01:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 287. [2020-12-23 13:01:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:01:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 813 transitions. [2020-12-23 13:01:32,525 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 813 transitions. Word has length 14 [2020-12-23 13:01:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:32,525 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 813 transitions. [2020-12-23 13:01:32,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 813 transitions. [2020-12-23 13:01:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:32,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:32,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:32,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-23 13:01:32,727 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash -73309793, now seen corresponding path program 84 times [2020-12-23 13:01:32,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:32,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577818989] [2020-12-23 13:01:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:32,825 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 13:01:32,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577818989] [2020-12-23 13:01:32,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990106496] [2020-12-23 13:01:32,826 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 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 13:01:32,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:32,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:32,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:33,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470648980] [2020-12-23 13:01:33,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:33,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:33,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:33,089 INFO L87 Difference]: Start difference. First operand 287 states and 813 transitions. Second operand 17 states. [2020-12-23 13:01:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:33,658 INFO L93 Difference]: Finished difference Result 407 states and 1069 transitions. [2020-12-23 13:01:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:01:33,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:33,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:33,661 INFO L225 Difference]: With dead ends: 407 [2020-12-23 13:01:33,661 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 13:01:33,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 13:01:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 288. [2020-12-23 13:01:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 13:01:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 816 transitions. [2020-12-23 13:01:33,666 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 816 transitions. Word has length 14 [2020-12-23 13:01:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:33,667 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 816 transitions. [2020-12-23 13:01:33,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 816 transitions. [2020-12-23 13:01:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:33,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:33,668 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:33,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-23 13:01:33,868 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -73248289, now seen corresponding path program 85 times [2020-12-23 13:01:33,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:33,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465172528] [2020-12-23 13:01:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:33,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465172528] [2020-12-23 13:01:33,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391169778] [2020-12-23 13:01:33,974 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 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 13:01:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:34,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:34,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:34,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:34,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515315788] [2020-12-23 13:01:34,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:34,194 INFO L87 Difference]: Start difference. First operand 288 states and 816 transitions. Second operand 17 states. [2020-12-23 13:01:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:34,547 INFO L93 Difference]: Finished difference Result 373 states and 988 transitions. [2020-12-23 13:01:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:34,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:34,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:34,550 INFO L225 Difference]: With dead ends: 373 [2020-12-23 13:01:34,550 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 13:01:34,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:01:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 13:01:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 287. [2020-12-23 13:01:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:01:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 811 transitions. [2020-12-23 13:01:34,555 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 811 transitions. Word has length 14 [2020-12-23 13:01:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:34,555 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 811 transitions. [2020-12-23 13:01:34,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 811 transitions. [2020-12-23 13:01:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:34,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:34,556 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:34,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:34,757 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash 506661395, now seen corresponding path program 86 times [2020-12-23 13:01:34,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:34,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22667942] [2020-12-23 13:01:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:34,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22667942] [2020-12-23 13:01:34,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221977003] [2020-12-23 13:01:34,854 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 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 13:01:34,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:34,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:34,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:34,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:35,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:35,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:35,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644802760] [2020-12-23 13:01:35,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:35,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:35,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:35,081 INFO L87 Difference]: Start difference. First operand 287 states and 811 transitions. Second operand 17 states. [2020-12-23 13:01:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:35,687 INFO L93 Difference]: Finished difference Result 387 states and 1013 transitions. [2020-12-23 13:01:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:35,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:35,689 INFO L225 Difference]: With dead ends: 387 [2020-12-23 13:01:35,689 INFO L226 Difference]: Without dead ends: 384 [2020-12-23 13:01:35,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:01:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-23 13:01:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 286. [2020-12-23 13:01:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 13:01:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 808 transitions. [2020-12-23 13:01:35,694 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 808 transitions. Word has length 14 [2020-12-23 13:01:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:35,694 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 808 transitions. [2020-12-23 13:01:35,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 808 transitions. [2020-12-23 13:01:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:35,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:35,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:35,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-23 13:01:35,896 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:35,897 INFO L82 PathProgramCache]: Analyzing trace with hash 506663317, now seen corresponding path program 87 times [2020-12-23 13:01:35,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:35,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556939472] [2020-12-23 13:01:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:35,997 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 13:01:35,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556939472] [2020-12-23 13:01:35,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728327718] [2020-12-23 13:01:35,998 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 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 13:01:36,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:36,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:36,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:36,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374838213] [2020-12-23 13:01:36,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:36,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:36,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:36,228 INFO L87 Difference]: Start difference. First operand 286 states and 808 transitions. Second operand 17 states. [2020-12-23 13:01:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:36,789 INFO L93 Difference]: Finished difference Result 411 states and 1070 transitions. [2020-12-23 13:01:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:01:36,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:36,792 INFO L225 Difference]: With dead ends: 411 [2020-12-23 13:01:36,792 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 13:01:36,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:01:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 13:01:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 287. [2020-12-23 13:01:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:01:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 810 transitions. [2020-12-23 13:01:36,797 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 810 transitions. Word has length 14 [2020-12-23 13:01:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:36,797 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 810 transitions. [2020-12-23 13:01:36,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 810 transitions. [2020-12-23 13:01:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:36,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:36,798 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:36,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:36,998 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash 525429725, now seen corresponding path program 88 times [2020-12-23 13:01:36,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:37,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605363359] [2020-12-23 13:01:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:37,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605363359] [2020-12-23 13:01:37,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095009387] [2020-12-23 13:01:37,101 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 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 13:01:37,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:37,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:37,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:37,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:37,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413642927] [2020-12-23 13:01:37,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:37,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:37,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:37,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:37,322 INFO L87 Difference]: Start difference. First operand 287 states and 810 transitions. Second operand 17 states. [2020-12-23 13:01:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:38,021 INFO L93 Difference]: Finished difference Result 388 states and 1006 transitions. [2020-12-23 13:01:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:38,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:38,024 INFO L225 Difference]: With dead ends: 388 [2020-12-23 13:01:38,024 INFO L226 Difference]: Without dead ends: 385 [2020-12-23 13:01:38,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:01:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-12-23 13:01:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 286. [2020-12-23 13:01:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 13:01:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 807 transitions. [2020-12-23 13:01:38,031 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 807 transitions. Word has length 14 [2020-12-23 13:01:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:38,031 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 807 transitions. [2020-12-23 13:01:38,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 807 transitions. [2020-12-23 13:01:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:38,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:38,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:38,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-23 13:01:38,233 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash 525431647, now seen corresponding path program 89 times [2020-12-23 13:01:38,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:38,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363435939] [2020-12-23 13:01:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:38,328 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 13:01:38,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363435939] [2020-12-23 13:01:38,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775210084] [2020-12-23 13:01:38,328 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 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 13:01:38,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:38,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:38,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:38,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:38,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092973051] [2020-12-23 13:01:38,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:38,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:38,551 INFO L87 Difference]: Start difference. First operand 286 states and 807 transitions. Second operand 17 states. [2020-12-23 13:01:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:39,262 INFO L93 Difference]: Finished difference Result 410 states and 1060 transitions. [2020-12-23 13:01:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:01:39,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:39,264 INFO L225 Difference]: With dead ends: 410 [2020-12-23 13:01:39,264 INFO L226 Difference]: Without dead ends: 405 [2020-12-23 13:01:39,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:01:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-23 13:01:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 289. [2020-12-23 13:01:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 13:01:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 816 transitions. [2020-12-23 13:01:39,269 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 816 transitions. Word has length 14 [2020-12-23 13:01:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:39,269 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 816 transitions. [2020-12-23 13:01:39,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 816 transitions. [2020-12-23 13:01:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:39,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:39,270 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:39,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:39,471 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash 526035155, now seen corresponding path program 90 times [2020-12-23 13:01:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:39,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845310097] [2020-12-23 13:01:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:39,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845310097] [2020-12-23 13:01:39,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095527660] [2020-12-23 13:01:39,573 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 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 13:01:39,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:39,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:39,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:39,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:39,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99662612] [2020-12-23 13:01:39,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:39,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:39,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:39,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:39,818 INFO L87 Difference]: Start difference. First operand 289 states and 816 transitions. Second operand 17 states. [2020-12-23 13:01:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:40,468 INFO L93 Difference]: Finished difference Result 369 states and 966 transitions. [2020-12-23 13:01:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:01:40,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:40,470 INFO L225 Difference]: With dead ends: 369 [2020-12-23 13:01:40,470 INFO L226 Difference]: Without dead ends: 366 [2020-12-23 13:01:40,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:01:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-23 13:01:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 289. [2020-12-23 13:01:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 13:01:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 815 transitions. [2020-12-23 13:01:40,476 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 815 transitions. Word has length 14 [2020-12-23 13:01:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:40,476 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 815 transitions. [2020-12-23 13:01:40,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 815 transitions. [2020-12-23 13:01:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:40,477 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:40,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:40,678 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash 526054623, now seen corresponding path program 91 times [2020-12-23 13:01:40,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:40,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481837080] [2020-12-23 13:01:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:40,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481837080] [2020-12-23 13:01:40,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260721558] [2020-12-23 13:01:40,816 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 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 13:01:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:40,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:41,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:41,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:41,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:41,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505955273] [2020-12-23 13:01:41,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:41,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:41,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:41,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:41,040 INFO L87 Difference]: Start difference. First operand 289 states and 815 transitions. Second operand 18 states. [2020-12-23 13:01:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:41,914 INFO L93 Difference]: Finished difference Result 396 states and 1024 transitions. [2020-12-23 13:01:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:01:41,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:41,916 INFO L225 Difference]: With dead ends: 396 [2020-12-23 13:01:41,916 INFO L226 Difference]: Without dead ends: 381 [2020-12-23 13:01:41,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=576, Invalid=1316, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:01:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-23 13:01:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 284. [2020-12-23 13:01:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-23 13:01:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 796 transitions. [2020-12-23 13:01:41,921 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 796 transitions. Word has length 14 [2020-12-23 13:01:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:41,921 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 796 transitions. [2020-12-23 13:01:41,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 796 transitions. [2020-12-23 13:01:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:41,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:41,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:42,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-12-23 13:01:42,123 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash 526094737, now seen corresponding path program 92 times [2020-12-23 13:01:42,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:42,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828764543] [2020-12-23 13:01:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828764543] [2020-12-23 13:01:42,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880615830] [2020-12-23 13:01:42,227 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 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 13:01:42,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:42,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:42,464 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 13:01:42,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:42,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:42,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473357238] [2020-12-23 13:01:42,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:42,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:42,466 INFO L87 Difference]: Start difference. First operand 284 states and 796 transitions. Second operand 17 states. [2020-12-23 13:01:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:43,272 INFO L93 Difference]: Finished difference Result 403 states and 1041 transitions. [2020-12-23 13:01:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:43,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:43,275 INFO L225 Difference]: With dead ends: 403 [2020-12-23 13:01:43,275 INFO L226 Difference]: Without dead ends: 398 [2020-12-23 13:01:43,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=941, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:01:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-23 13:01:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 288. [2020-12-23 13:01:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 13:01:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 810 transitions. [2020-12-23 13:01:43,280 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 810 transitions. Word has length 14 [2020-12-23 13:01:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:43,280 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 810 transitions. [2020-12-23 13:01:43,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 810 transitions. [2020-12-23 13:01:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:43,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:43,281 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:43,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-23 13:01:43,481 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash 526114205, now seen corresponding path program 93 times [2020-12-23 13:01:43,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:43,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417064990] [2020-12-23 13:01:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:43,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417064990] [2020-12-23 13:01:43,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539656245] [2020-12-23 13:01:43,604 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 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 13:01:43,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:01:43,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:43,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:01:43,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:43,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:43,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:43,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:43,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:43,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:43,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403386683] [2020-12-23 13:01:43,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:43,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:43,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:43,852 INFO L87 Difference]: Start difference. First operand 288 states and 810 transitions. Second operand 18 states. [2020-12-23 13:01:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:45,476 INFO L93 Difference]: Finished difference Result 490 states and 1228 transitions. [2020-12-23 13:01:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 13:01:45,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:45,478 INFO L225 Difference]: With dead ends: 490 [2020-12-23 13:01:45,478 INFO L226 Difference]: Without dead ends: 474 [2020-12-23 13:01:45,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=786, Invalid=2076, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 13:01:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-23 13:01:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 285. [2020-12-23 13:01:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-23 13:01:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 801 transitions. [2020-12-23 13:01:45,487 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 801 transitions. Word has length 14 [2020-12-23 13:01:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:45,488 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 801 transitions. [2020-12-23 13:01:45,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 801 transitions. [2020-12-23 13:01:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:45,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:45,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:45,699 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash 527961247, now seen corresponding path program 94 times [2020-12-23 13:01:45,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:45,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586216264] [2020-12-23 13:01:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:45,824 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 13:01:45,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586216264] [2020-12-23 13:01:45,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684716155] [2020-12-23 13:01:45,825 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 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 13:01:45,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:46,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:46,145 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 13:01:46,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:46,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:46,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363905804] [2020-12-23 13:01:46,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:46,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:46,148 INFO L87 Difference]: Start difference. First operand 285 states and 801 transitions. Second operand 18 states. [2020-12-23 13:01:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:47,275 INFO L93 Difference]: Finished difference Result 518 states and 1332 transitions. [2020-12-23 13:01:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 13:01:47,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:47,277 INFO L225 Difference]: With dead ends: 518 [2020-12-23 13:01:47,277 INFO L226 Difference]: Without dead ends: 480 [2020-12-23 13:01:47,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 13:01:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-12-23 13:01:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 278. [2020-12-23 13:01:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 13:01:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 787 transitions. [2020-12-23 13:01:47,284 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 787 transitions. Word has length 14 [2020-12-23 13:01:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:47,285 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 787 transitions. [2020-12-23 13:01:47,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 787 transitions. [2020-12-23 13:01:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:47,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:47,285 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:47,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-23 13:01:47,486 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:47,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:47,487 INFO L82 PathProgramCache]: Analyzing trace with hash 563919697, now seen corresponding path program 95 times [2020-12-23 13:01:47,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:47,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280037773] [2020-12-23 13:01:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:47,586 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 13:01:47,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280037773] [2020-12-23 13:01:47,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042414273] [2020-12-23 13:01:47,586 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 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 13:01:47,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:47,842 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 13:01:47,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:47,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:47,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881679601] [2020-12-23 13:01:47,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:47,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:47,843 INFO L87 Difference]: Start difference. First operand 278 states and 787 transitions. Second operand 17 states. [2020-12-23 13:01:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:48,528 INFO L93 Difference]: Finished difference Result 410 states and 1069 transitions. [2020-12-23 13:01:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:01:48,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:48,531 INFO L225 Difference]: With dead ends: 410 [2020-12-23 13:01:48,531 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 13:01:48,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:01:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 13:01:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 277. [2020-12-23 13:01:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 13:01:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 785 transitions. [2020-12-23 13:01:48,538 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 785 transitions. Word has length 14 [2020-12-23 13:01:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:48,539 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 785 transitions. [2020-12-23 13:01:48,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 785 transitions. [2020-12-23 13:01:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:48,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:48,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-23 13:01:48,756 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash 582688027, now seen corresponding path program 96 times [2020-12-23 13:01:48,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:48,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543180748] [2020-12-23 13:01:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:48,868 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 13:01:48,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543180748] [2020-12-23 13:01:48,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905657647] [2020-12-23 13:01:48,868 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 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 13:01:48,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:49,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:49,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:49,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737193556] [2020-12-23 13:01:49,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:49,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:49,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:49,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:49,118 INFO L87 Difference]: Start difference. First operand 277 states and 785 transitions. Second operand 17 states. [2020-12-23 13:01:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:49,926 INFO L93 Difference]: Finished difference Result 401 states and 1047 transitions. [2020-12-23 13:01:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:01:49,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:49,928 INFO L225 Difference]: With dead ends: 401 [2020-12-23 13:01:49,928 INFO L226 Difference]: Without dead ends: 397 [2020-12-23 13:01:49,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:01:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-23 13:01:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 276. [2020-12-23 13:01:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-23 13:01:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 782 transitions. [2020-12-23 13:01:49,933 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 782 transitions. Word has length 14 [2020-12-23 13:01:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:49,933 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 782 transitions. [2020-12-23 13:01:49,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 782 transitions. [2020-12-23 13:01:49,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:49,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:49,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:50,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-12-23 13:01:50,135 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash 583293457, now seen corresponding path program 97 times [2020-12-23 13:01:50,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:50,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654679455] [2020-12-23 13:01:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:50,241 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 13:01:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654679455] [2020-12-23 13:01:50,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657653439] [2020-12-23 13:01:50,242 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 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 13:01:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:50,492 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 13:01:50,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:50,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:50,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123259847] [2020-12-23 13:01:50,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:50,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:50,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:50,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:50,493 INFO L87 Difference]: Start difference. First operand 276 states and 782 transitions. Second operand 17 states. [2020-12-23 13:01:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:51,459 INFO L93 Difference]: Finished difference Result 399 states and 1035 transitions. [2020-12-23 13:01:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:01:51,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:51,461 INFO L225 Difference]: With dead ends: 399 [2020-12-23 13:01:51,461 INFO L226 Difference]: Without dead ends: 395 [2020-12-23 13:01:51,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=1051, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:01:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-23 13:01:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 277. [2020-12-23 13:01:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 13:01:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 784 transitions. [2020-12-23 13:01:51,467 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 784 transitions. Word has length 14 [2020-12-23 13:01:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:51,467 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 784 transitions. [2020-12-23 13:01:51,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 784 transitions. [2020-12-23 13:01:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:51,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:51,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:51,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:51,668 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:51,669 INFO L82 PathProgramCache]: Analyzing trace with hash 583314847, now seen corresponding path program 98 times [2020-12-23 13:01:51,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:51,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223001401] [2020-12-23 13:01:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:51,788 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 13:01:51,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223001401] [2020-12-23 13:01:51,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398084659] [2020-12-23 13:01:51,789 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 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 13:01:51,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:51,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:52,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:52,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:52,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:52,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:52,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:52,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:52,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:52,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:52,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981622614] [2020-12-23 13:01:52,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:52,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:52,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:52,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:52,078 INFO L87 Difference]: Start difference. First operand 277 states and 784 transitions. Second operand 18 states. [2020-12-23 13:01:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:53,708 INFO L93 Difference]: Finished difference Result 518 states and 1321 transitions. [2020-12-23 13:01:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 13:01:53,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:53,711 INFO L225 Difference]: With dead ends: 518 [2020-12-23 13:01:53,711 INFO L226 Difference]: Without dead ends: 502 [2020-12-23 13:01:53,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 13:01:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-23 13:01:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 277. [2020-12-23 13:01:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 13:01:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 787 transitions. [2020-12-23 13:01:53,716 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 787 transitions. Word has length 14 [2020-12-23 13:01:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:53,716 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 787 transitions. [2020-12-23 13:01:53,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 787 transitions. [2020-12-23 13:01:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:53,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:53,717 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:53,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-23 13:01:53,918 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1129054289, now seen corresponding path program 99 times [2020-12-23 13:01:53,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:53,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092800081] [2020-12-23 13:01:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:54,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092800081] [2020-12-23 13:01:54,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868429851] [2020-12-23 13:01:54,035 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 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 13:01:54,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:54,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:54,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:54,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:54,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699380272] [2020-12-23 13:01:54,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:54,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:54,305 INFO L87 Difference]: Start difference. First operand 277 states and 787 transitions. Second operand 17 states. [2020-12-23 13:01:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:54,748 INFO L93 Difference]: Finished difference Result 386 states and 1021 transitions. [2020-12-23 13:01:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:54,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:54,750 INFO L225 Difference]: With dead ends: 386 [2020-12-23 13:01:54,750 INFO L226 Difference]: Without dead ends: 371 [2020-12-23 13:01:54,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-23 13:01:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 286. [2020-12-23 13:01:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 13:01:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 807 transitions. [2020-12-23 13:01:54,755 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 807 transitions. Word has length 14 [2020-12-23 13:01:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:54,755 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 807 transitions. [2020-12-23 13:01:54,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 807 transitions. [2020-12-23 13:01:54,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:54,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:54,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:54,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-23 13:01:54,957 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1130839827, now seen corresponding path program 100 times [2020-12-23 13:01:54,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:54,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703328295] [2020-12-23 13:01:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:55,067 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 13:01:55,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703328295] [2020-12-23 13:01:55,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960399351] [2020-12-23 13:01:55,068 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:55,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:55,305 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 13:01:55,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:55,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371937418] [2020-12-23 13:01:55,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:55,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:55,307 INFO L87 Difference]: Start difference. First operand 286 states and 807 transitions. Second operand 17 states. [2020-12-23 13:01:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:55,643 INFO L93 Difference]: Finished difference Result 380 states and 1001 transitions. [2020-12-23 13:01:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:55,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:55,645 INFO L225 Difference]: With dead ends: 380 [2020-12-23 13:01:55,646 INFO L226 Difference]: Without dead ends: 376 [2020-12-23 13:01:55,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:01:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-23 13:01:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 287. [2020-12-23 13:01:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:01:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 809 transitions. [2020-12-23 13:01:55,653 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 809 transitions. Word has length 14 [2020-12-23 13:01:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:55,653 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 809 transitions. [2020-12-23 13:01:55,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 809 transitions. [2020-12-23 13:01:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:55,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:55,654 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:55,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:55,868 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:55,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841749, now seen corresponding path program 101 times [2020-12-23 13:01:55,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:55,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100643849] [2020-12-23 13:01:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:55,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100643849] [2020-12-23 13:01:55,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150110146] [2020-12-23 13:01:55,976 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:56,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:56,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:56,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:56,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:56,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511025973] [2020-12-23 13:01:56,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:56,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:56,208 INFO L87 Difference]: Start difference. First operand 287 states and 809 transitions. Second operand 17 states. [2020-12-23 13:01:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:56,543 INFO L93 Difference]: Finished difference Result 393 states and 1034 transitions. [2020-12-23 13:01:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:56,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:56,545 INFO L225 Difference]: With dead ends: 393 [2020-12-23 13:01:56,545 INFO L226 Difference]: Without dead ends: 379 [2020-12-23 13:01:56,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:01:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-23 13:01:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 289. [2020-12-23 13:01:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 13:01:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 813 transitions. [2020-12-23 13:01:56,550 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 813 transitions. Word has length 14 [2020-12-23 13:01:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:56,550 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 813 transitions. [2020-12-23 13:01:56,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 813 transitions. [2020-12-23 13:01:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:56,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:56,551 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:56,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:56,752 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1186310669, now seen corresponding path program 102 times [2020-12-23 13:01:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:56,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991464218] [2020-12-23 13:01:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:56,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991464218] [2020-12-23 13:01:56,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994991062] [2020-12-23 13:01:56,868 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:56,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:56,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:57,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:57,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:57,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623278970] [2020-12-23 13:01:57,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:57,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:57,134 INFO L87 Difference]: Start difference. First operand 289 states and 813 transitions. Second operand 17 states. [2020-12-23 13:01:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:57,484 INFO L93 Difference]: Finished difference Result 381 states and 1007 transitions. [2020-12-23 13:01:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:01:57,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:57,486 INFO L225 Difference]: With dead ends: 381 [2020-12-23 13:01:57,486 INFO L226 Difference]: Without dead ends: 368 [2020-12-23 13:01:57,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-12-23 13:01:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 289. [2020-12-23 13:01:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 13:01:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 811 transitions. [2020-12-23 13:01:57,493 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 811 transitions. Word has length 14 [2020-12-23 13:01:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:57,493 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 811 transitions. [2020-12-23 13:01:57,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 811 transitions. [2020-12-23 13:01:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:57,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:57,494 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:57,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:57,698 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1733626037, now seen corresponding path program 103 times [2020-12-23 13:01:57,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:57,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257947672] [2020-12-23 13:01:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:57,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257947672] [2020-12-23 13:01:57,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530280194] [2020-12-23 13:01:57,808 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:58,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:58,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335470062] [2020-12-23 13:01:58,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:58,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:58,062 INFO L87 Difference]: Start difference. First operand 289 states and 811 transitions. Second operand 17 states. [2020-12-23 13:01:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:58,574 INFO L93 Difference]: Finished difference Result 406 states and 1060 transitions. [2020-12-23 13:01:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:58,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:58,577 INFO L225 Difference]: With dead ends: 406 [2020-12-23 13:01:58,577 INFO L226 Difference]: Without dead ends: 391 [2020-12-23 13:01:58,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=567, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-12-23 13:01:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 294. [2020-12-23 13:01:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-12-23 13:01:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 821 transitions. [2020-12-23 13:01:58,583 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 821 transitions. Word has length 14 [2020-12-23 13:01:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:58,583 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 821 transitions. [2020-12-23 13:01:58,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 821 transitions. [2020-12-23 13:01:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:58,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:58,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:58,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:58,784 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:58,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1735411575, now seen corresponding path program 104 times [2020-12-23 13:01:58,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:58,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436808644] [2020-12-23 13:01:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:58,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436808644] [2020-12-23 13:01:58,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217557738] [2020-12-23 13:01:58,892 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:58,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:58,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:58,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:59,112 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 13:01:59,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:59,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982936798] [2020-12-23 13:01:59,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:59,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:59,114 INFO L87 Difference]: Start difference. First operand 294 states and 821 transitions. Second operand 17 states. [2020-12-23 13:01:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:59,568 INFO L93 Difference]: Finished difference Result 397 states and 1034 transitions. [2020-12-23 13:01:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:59,569 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:59,570 INFO L225 Difference]: With dead ends: 397 [2020-12-23 13:01:59,570 INFO L226 Difference]: Without dead ends: 393 [2020-12-23 13:01:59,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-23 13:01:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 295. [2020-12-23 13:01:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-23 13:01:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 823 transitions. [2020-12-23 13:01:59,575 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 823 transitions. Word has length 14 [2020-12-23 13:01:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:59,575 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 823 transitions. [2020-12-23 13:01:59,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 823 transitions. [2020-12-23 13:01:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:59,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:59,576 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:59,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-12-23 13:01:59,777 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1735413497, now seen corresponding path program 105 times [2020-12-23 13:01:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:59,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311051628] [2020-12-23 13:01:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:59,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311051628] [2020-12-23 13:01:59,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067455079] [2020-12-23 13:01:59,890 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:59,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:59,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:59,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:59,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:00,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:00,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:00,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955656236] [2020-12-23 13:02:00,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:00,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:00,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:00,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:00,102 INFO L87 Difference]: Start difference. First operand 295 states and 823 transitions. Second operand 17 states. [2020-12-23 13:02:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:00,492 INFO L93 Difference]: Finished difference Result 407 states and 1060 transitions. [2020-12-23 13:02:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:02:00,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:00,494 INFO L225 Difference]: With dead ends: 407 [2020-12-23 13:02:00,494 INFO L226 Difference]: Without dead ends: 393 [2020-12-23 13:02:00,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-23 13:02:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 295. [2020-12-23 13:02:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-23 13:02:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 823 transitions. [2020-12-23 13:02:00,499 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 823 transitions. Word has length 14 [2020-12-23 13:02:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:00,499 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 823 transitions. [2020-12-23 13:02:00,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 823 transitions. [2020-12-23 13:02:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:00,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:00,500 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:00,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-23 13:02:00,702 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1790882417, now seen corresponding path program 106 times [2020-12-23 13:02:00,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:00,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704827378] [2020-12-23 13:02:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:00,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704827378] [2020-12-23 13:02:00,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161168313] [2020-12-23 13:02:00,806 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:00,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:00,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:01,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:01,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:01,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39151037] [2020-12-23 13:02:01,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:01,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:01,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:01,100 INFO L87 Difference]: Start difference. First operand 295 states and 823 transitions. Second operand 17 states. [2020-12-23 13:02:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:01,561 INFO L93 Difference]: Finished difference Result 391 states and 1025 transitions. [2020-12-23 13:02:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:01,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:01,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:01,565 INFO L225 Difference]: With dead ends: 391 [2020-12-23 13:02:01,565 INFO L226 Difference]: Without dead ends: 378 [2020-12-23 13:02:01,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-12-23 13:02:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 287. [2020-12-23 13:02:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 13:02:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 807 transitions. [2020-12-23 13:02:01,574 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 807 transitions. Word has length 14 [2020-12-23 13:02:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:01,574 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 807 transitions. [2020-12-23 13:02:01,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 807 transitions. [2020-12-23 13:02:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:01,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:01,575 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:01,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-23 13:02:01,788 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1704845313, now seen corresponding path program 107 times [2020-12-23 13:02:01,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:01,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052112852] [2020-12-23 13:02:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:01,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052112852] [2020-12-23 13:02:01,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839730351] [2020-12-23 13:02:01,903 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:01,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:01,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:01,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:02,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:02,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:02,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534593227] [2020-12-23 13:02:02,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:02,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:02,175 INFO L87 Difference]: Start difference. First operand 287 states and 807 transitions. Second operand 17 states. [2020-12-23 13:02:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:02,718 INFO L93 Difference]: Finished difference Result 403 states and 1051 transitions. [2020-12-23 13:02:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:02,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:02,720 INFO L225 Difference]: With dead ends: 403 [2020-12-23 13:02:02,720 INFO L226 Difference]: Without dead ends: 388 [2020-12-23 13:02:02,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:02:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-12-23 13:02:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 289. [2020-12-23 13:02:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 13:02:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 811 transitions. [2020-12-23 13:02:02,726 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 811 transitions. Word has length 14 [2020-12-23 13:02:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:02,726 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 811 transitions. [2020-12-23 13:02:02,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 811 transitions. [2020-12-23 13:02:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:02,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:02,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:02,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:02,928 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:02,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1703059775, now seen corresponding path program 108 times [2020-12-23 13:02:02,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:02,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249462064] [2020-12-23 13:02:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:03,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249462064] [2020-12-23 13:02:03,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119310124] [2020-12-23 13:02:03,043 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:03,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:03,307 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 13:02:03,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:03,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:03,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633771994] [2020-12-23 13:02:03,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:03,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:03,309 INFO L87 Difference]: Start difference. First operand 289 states and 811 transitions. Second operand 17 states. [2020-12-23 13:02:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:03,776 INFO L93 Difference]: Finished difference Result 390 states and 1018 transitions. [2020-12-23 13:02:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:03,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:03,779 INFO L225 Difference]: With dead ends: 390 [2020-12-23 13:02:03,779 INFO L226 Difference]: Without dead ends: 386 [2020-12-23 13:02:03,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-23 13:02:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 290. [2020-12-23 13:02:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-23 13:02:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 813 transitions. [2020-12-23 13:02:03,788 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 813 transitions. Word has length 14 [2020-12-23 13:02:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:03,788 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 813 transitions. [2020-12-23 13:02:03,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 813 transitions. [2020-12-23 13:02:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:03,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:03,789 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:03,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-23 13:02:03,990 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1703057853, now seen corresponding path program 109 times [2020-12-23 13:02:03,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:03,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350349837] [2020-12-23 13:02:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:04,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350349837] [2020-12-23 13:02:04,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260083905] [2020-12-23 13:02:04,119 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:04,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:04,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:04,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284202521] [2020-12-23 13:02:04,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:04,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:04,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:04,365 INFO L87 Difference]: Start difference. First operand 290 states and 813 transitions. Second operand 17 states. [2020-12-23 13:02:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:04,811 INFO L93 Difference]: Finished difference Result 400 states and 1044 transitions. [2020-12-23 13:02:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:04,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:04,814 INFO L225 Difference]: With dead ends: 400 [2020-12-23 13:02:04,814 INFO L226 Difference]: Without dead ends: 386 [2020-12-23 13:02:04,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-23 13:02:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 290. [2020-12-23 13:02:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-23 13:02:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 813 transitions. [2020-12-23 13:02:04,820 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 813 transitions. Word has length 14 [2020-12-23 13:02:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:04,820 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 813 transitions. [2020-12-23 13:02:04,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 813 transitions. [2020-12-23 13:02:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:04,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:04,821 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:05,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:05,022 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1123027083, now seen corresponding path program 110 times [2020-12-23 13:02:05,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:05,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24536367] [2020-12-23 13:02:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:05,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24536367] [2020-12-23 13:02:05,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029426717] [2020-12-23 13:02:05,145 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:05,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:05,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:05,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:05,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:05,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:05,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219328044] [2020-12-23 13:02:05,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:05,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:05,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:05,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:05,398 INFO L87 Difference]: Start difference. First operand 290 states and 813 transitions. Second operand 17 states. [2020-12-23 13:02:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:06,140 INFO L93 Difference]: Finished difference Result 412 states and 1061 transitions. [2020-12-23 13:02:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:06,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:06,143 INFO L225 Difference]: With dead ends: 412 [2020-12-23 13:02:06,143 INFO L226 Difference]: Without dead ends: 397 [2020-12-23 13:02:06,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-23 13:02:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 290. [2020-12-23 13:02:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-23 13:02:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 810 transitions. [2020-12-23 13:02:06,150 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 810 transitions. Word has length 14 [2020-12-23 13:02:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:06,150 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 810 transitions. [2020-12-23 13:02:06,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 810 transitions. [2020-12-23 13:02:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:06,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:06,151 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:06,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-12-23 13:02:06,365 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1102471293, now seen corresponding path program 111 times [2020-12-23 13:02:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:06,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345993519] [2020-12-23 13:02:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:06,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345993519] [2020-12-23 13:02:06,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361883967] [2020-12-23 13:02:06,480 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:06,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:06,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:06,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:06,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684663079] [2020-12-23 13:02:06,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:06,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:06,749 INFO L87 Difference]: Start difference. First operand 290 states and 810 transitions. Second operand 17 states. [2020-12-23 13:02:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:07,707 INFO L93 Difference]: Finished difference Result 426 states and 1087 transitions. [2020-12-23 13:02:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 13:02:07,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:07,710 INFO L225 Difference]: With dead ends: 426 [2020-12-23 13:02:07,710 INFO L226 Difference]: Without dead ends: 412 [2020-12-23 13:02:07,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:02:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-12-23 13:02:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 290. [2020-12-23 13:02:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-23 13:02:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 807 transitions. [2020-12-23 13:02:07,716 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 807 transitions. Word has length 14 [2020-12-23 13:02:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:07,716 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 807 transitions. [2020-12-23 13:02:07,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 807 transitions. [2020-12-23 13:02:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:07,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:07,717 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:07,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:07,919 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1101808203, now seen corresponding path program 112 times [2020-12-23 13:02:07,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354142410] [2020-12-23 13:02:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:08,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354142410] [2020-12-23 13:02:08,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222839421] [2020-12-23 13:02:08,038 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:08,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:08,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:08,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:08,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266555287] [2020-12-23 13:02:08,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:08,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:08,308 INFO L87 Difference]: Start difference. First operand 290 states and 807 transitions. Second operand 17 states. [2020-12-23 13:02:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:09,268 INFO L93 Difference]: Finished difference Result 418 states and 1077 transitions. [2020-12-23 13:02:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:02:09,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:09,272 INFO L225 Difference]: With dead ends: 418 [2020-12-23 13:02:09,272 INFO L226 Difference]: Without dead ends: 405 [2020-12-23 13:02:09,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=431, Invalid=1051, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:02:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-23 13:02:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 294. [2020-12-23 13:02:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-12-23 13:02:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 820 transitions. [2020-12-23 13:02:09,281 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 820 transitions. Word has length 14 [2020-12-23 13:02:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:09,281 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 820 transitions. [2020-12-23 13:02:09,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 820 transitions. [2020-12-23 13:02:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:09,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:09,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:09,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-12-23 13:02:09,498 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1101788735, now seen corresponding path program 113 times [2020-12-23 13:02:09,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:09,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515639721] [2020-12-23 13:02:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:09,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515639721] [2020-12-23 13:02:09,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753082660] [2020-12-23 13:02:09,645 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:09,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:09,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:09,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:09,938 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:09,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:09,978 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 13:02:09,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:09,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:09,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105999846] [2020-12-23 13:02:09,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:09,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:09,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:09,980 INFO L87 Difference]: Start difference. First operand 294 states and 820 transitions. Second operand 18 states. [2020-12-23 13:02:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:11,610 INFO L93 Difference]: Finished difference Result 528 states and 1316 transitions. [2020-12-23 13:02:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 13:02:11,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:11,612 INFO L225 Difference]: With dead ends: 528 [2020-12-23 13:02:11,612 INFO L226 Difference]: Without dead ends: 499 [2020-12-23 13:02:11,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 13:02:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-23 13:02:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 285. [2020-12-23 13:02:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-23 13:02:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 794 transitions. [2020-12-23 13:02:11,617 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 794 transitions. Word has length 14 [2020-12-23 13:02:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:11,618 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 794 transitions. [2020-12-23 13:02:11,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 794 transitions. [2020-12-23 13:02:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:11,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:11,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:11,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:11,832 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1065830285, now seen corresponding path program 114 times [2020-12-23 13:02:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:11,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204638861] [2020-12-23 13:02:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:11,945 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 13:02:11,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204638861] [2020-12-23 13:02:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794668718] [2020-12-23 13:02:11,946 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:12,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:12,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:12,198 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 13:02:12,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:12,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:12,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303270619] [2020-12-23 13:02:12,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:12,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:12,200 INFO L87 Difference]: Start difference. First operand 285 states and 794 transitions. Second operand 17 states. [2020-12-23 13:02:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:12,842 INFO L93 Difference]: Finished difference Result 414 states and 1057 transitions. [2020-12-23 13:02:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:12,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:12,845 INFO L225 Difference]: With dead ends: 414 [2020-12-23 13:02:12,845 INFO L226 Difference]: Without dead ends: 410 [2020-12-23 13:02:12,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-23 13:02:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 286. [2020-12-23 13:02:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 13:02:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 797 transitions. [2020-12-23 13:02:12,853 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 797 transitions. Word has length 14 [2020-12-23 13:02:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:12,853 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 797 transitions. [2020-12-23 13:02:12,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 797 transitions. [2020-12-23 13:02:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:12,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:12,854 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:13,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-12-23 13:02:13,068 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:13,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1065828363, now seen corresponding path program 115 times [2020-12-23 13:02:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:13,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964278099] [2020-12-23 13:02:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:13,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964278099] [2020-12-23 13:02:13,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136190954] [2020-12-23 13:02:13,201 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:13,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:13,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:13,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349750160] [2020-12-23 13:02:13,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:13,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:13,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:13,469 INFO L87 Difference]: Start difference. First operand 286 states and 797 transitions. Second operand 17 states. [2020-12-23 13:02:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:14,058 INFO L93 Difference]: Finished difference Result 416 states and 1066 transitions. [2020-12-23 13:02:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:14,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:14,061 INFO L225 Difference]: With dead ends: 416 [2020-12-23 13:02:14,061 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 13:02:14,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:02:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 13:02:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 282. [2020-12-23 13:02:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-23 13:02:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 788 transitions. [2020-12-23 13:02:14,066 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 788 transitions. Word has length 14 [2020-12-23 13:02:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:14,066 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 788 transitions. [2020-12-23 13:02:14,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 788 transitions. [2020-12-23 13:02:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:14,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:14,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:14,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-23 13:02:14,267 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1047061955, now seen corresponding path program 116 times [2020-12-23 13:02:14,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:14,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603460392] [2020-12-23 13:02:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:14,364 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 13:02:14,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603460392] [2020-12-23 13:02:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369396079] [2020-12-23 13:02:14,365 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:14,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:14,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:14,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:14,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:14,615 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 13:02:14,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:14,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:14,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700468211] [2020-12-23 13:02:14,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:14,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:14,617 INFO L87 Difference]: Start difference. First operand 282 states and 788 transitions. Second operand 17 states. [2020-12-23 13:02:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:15,474 INFO L93 Difference]: Finished difference Result 412 states and 1047 transitions. [2020-12-23 13:02:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:02:15,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:15,475 INFO L225 Difference]: With dead ends: 412 [2020-12-23 13:02:15,476 INFO L226 Difference]: Without dead ends: 408 [2020-12-23 13:02:15,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=390, Invalid=942, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:02:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-12-23 13:02:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 281. [2020-12-23 13:02:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 13:02:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 785 transitions. [2020-12-23 13:02:15,481 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 785 transitions. Word has length 14 [2020-12-23 13:02:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:15,481 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 785 transitions. [2020-12-23 13:02:15,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 785 transitions. [2020-12-23 13:02:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:15,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:15,482 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:15,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-12-23 13:02:15,693 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:15,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1047060033, now seen corresponding path program 117 times [2020-12-23 13:02:15,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:15,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580816598] [2020-12-23 13:02:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:15,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580816598] [2020-12-23 13:02:15,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508207340] [2020-12-23 13:02:15,799 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:15,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:15,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:15,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:16,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:16,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:16,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106677319] [2020-12-23 13:02:16,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:16,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:16,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:16,058 INFO L87 Difference]: Start difference. First operand 281 states and 785 transitions. Second operand 17 states. [2020-12-23 13:02:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:16,795 INFO L93 Difference]: Finished difference Result 420 states and 1073 transitions. [2020-12-23 13:02:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:16,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:16,797 INFO L225 Difference]: With dead ends: 420 [2020-12-23 13:02:16,797 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 13:02:16,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 13:02:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 281. [2020-12-23 13:02:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 13:02:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 782 transitions. [2020-12-23 13:02:16,803 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 782 transitions. Word has length 14 [2020-12-23 13:02:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:16,803 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 782 transitions. [2020-12-23 13:02:16,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 782 transitions. [2020-12-23 13:02:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:16,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:16,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:17,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:17,005 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1046456525, now seen corresponding path program 118 times [2020-12-23 13:02:17,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:17,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529275874] [2020-12-23 13:02:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529275874] [2020-12-23 13:02:17,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52327970] [2020-12-23 13:02:17,120 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:17,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:17,377 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 13:02:17,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:17,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:17,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847399659] [2020-12-23 13:02:17,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:17,379 INFO L87 Difference]: Start difference. First operand 281 states and 782 transitions. Second operand 17 states. [2020-12-23 13:02:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:18,296 INFO L93 Difference]: Finished difference Result 410 states and 1043 transitions. [2020-12-23 13:02:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:02:18,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:18,298 INFO L225 Difference]: With dead ends: 410 [2020-12-23 13:02:18,298 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 13:02:18,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=942, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:02:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 13:02:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 281. [2020-12-23 13:02:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 13:02:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 781 transitions. [2020-12-23 13:02:18,303 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 781 transitions. Word has length 14 [2020-12-23 13:02:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:18,303 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 781 transitions. [2020-12-23 13:02:18,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 781 transitions. [2020-12-23 13:02:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:18,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:18,304 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:18,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:18,505 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1046437057, now seen corresponding path program 119 times [2020-12-23 13:02:18,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:18,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171024703] [2020-12-23 13:02:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171024703] [2020-12-23 13:02:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000649110] [2020-12-23 13:02:18,644 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:18,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:18,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:18,858 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:18,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:18,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580394832] [2020-12-23 13:02:18,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:18,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:18,886 INFO L87 Difference]: Start difference. First operand 281 states and 781 transitions. Second operand 18 states. [2020-12-23 13:02:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:19,995 INFO L93 Difference]: Finished difference Result 467 states and 1171 transitions. [2020-12-23 13:02:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:02:19,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:19,997 INFO L225 Difference]: With dead ends: 467 [2020-12-23 13:02:19,997 INFO L226 Difference]: Without dead ends: 449 [2020-12-23 13:02:19,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=571, Invalid=1499, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 13:02:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-12-23 13:02:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 280. [2020-12-23 13:02:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-23 13:02:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 765 transitions. [2020-12-23 13:02:20,002 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 765 transitions. Word has length 14 [2020-12-23 13:02:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:20,002 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 765 transitions. [2020-12-23 13:02:20,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 765 transitions. [2020-12-23 13:02:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:20,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:20,003 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:20,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-12-23 13:02:20,204 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1046396943, now seen corresponding path program 120 times [2020-12-23 13:02:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:20,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724885837] [2020-12-23 13:02:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:20,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724885837] [2020-12-23 13:02:20,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446166820] [2020-12-23 13:02:20,327 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:20,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:20,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:20,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:20,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:20,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252277287] [2020-12-23 13:02:20,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:20,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:20,557 INFO L87 Difference]: Start difference. First operand 280 states and 765 transitions. Second operand 17 states. [2020-12-23 13:02:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:21,365 INFO L93 Difference]: Finished difference Result 424 states and 1078 transitions. [2020-12-23 13:02:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:21,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:21,367 INFO L225 Difference]: With dead ends: 424 [2020-12-23 13:02:21,367 INFO L226 Difference]: Without dead ends: 411 [2020-12-23 13:02:21,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-23 13:02:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 284. [2020-12-23 13:02:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-23 13:02:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 778 transitions. [2020-12-23 13:02:21,374 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 778 transitions. Word has length 14 [2020-12-23 13:02:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:21,374 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 778 transitions. [2020-12-23 13:02:21,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 778 transitions. [2020-12-23 13:02:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:21,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:21,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:21,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-12-23 13:02:21,582 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1046377475, now seen corresponding path program 121 times [2020-12-23 13:02:21,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:21,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589952399] [2020-12-23 13:02:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:21,736 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 13:02:21,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589952399] [2020-12-23 13:02:21,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221563596] [2020-12-23 13:02:21,737 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:21,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:21,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:21,985 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 13:02:21,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:21,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:21,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796785651] [2020-12-23 13:02:21,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:21,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:21,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:21,987 INFO L87 Difference]: Start difference. First operand 284 states and 778 transitions. Second operand 18 states. [2020-12-23 13:02:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:23,045 INFO L93 Difference]: Finished difference Result 529 states and 1294 transitions. [2020-12-23 13:02:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:02:23,046 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:23,047 INFO L225 Difference]: With dead ends: 529 [2020-12-23 13:02:23,047 INFO L226 Difference]: Without dead ends: 501 [2020-12-23 13:02:23,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-12-23 13:02:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 269. [2020-12-23 13:02:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-23 13:02:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 727 transitions. [2020-12-23 13:02:23,052 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 727 transitions. Word has length 14 [2020-12-23 13:02:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:23,053 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 727 transitions. [2020-12-23 13:02:23,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 727 transitions. [2020-12-23 13:02:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:23,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:23,053 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:23,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:23,254 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 72007169, now seen corresponding path program 122 times [2020-12-23 13:02:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:23,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612651664] [2020-12-23 13:02:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612651664] [2020-12-23 13:02:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349872671] [2020-12-23 13:02:23,383 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:23,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:23,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:23,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:23,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588479594] [2020-12-23 13:02:23,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:23,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:23,635 INFO L87 Difference]: Start difference. First operand 269 states and 727 transitions. Second operand 17 states. [2020-12-23 13:02:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:23,935 INFO L93 Difference]: Finished difference Result 352 states and 895 transitions. [2020-12-23 13:02:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:02:23,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:23,938 INFO L225 Difference]: With dead ends: 352 [2020-12-23 13:02:23,938 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 13:02:23,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:02:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 13:02:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 267. [2020-12-23 13:02:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 13:02:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 723 transitions. [2020-12-23 13:02:23,942 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 723 transitions. Word has length 14 [2020-12-23 13:02:23,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:23,942 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 723 transitions. [2020-12-23 13:02:23,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 723 transitions. [2020-12-23 13:02:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:23,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:23,943 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:24,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:24,143 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash 709236659, now seen corresponding path program 123 times [2020-12-23 13:02:24,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:24,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111733566] [2020-12-23 13:02:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:24,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111733566] [2020-12-23 13:02:24,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106872912] [2020-12-23 13:02:24,279 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:24,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:24,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:24,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:24,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921981292] [2020-12-23 13:02:24,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:24,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:24,537 INFO L87 Difference]: Start difference. First operand 267 states and 723 transitions. Second operand 17 states. [2020-12-23 13:02:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:24,863 INFO L93 Difference]: Finished difference Result 348 states and 887 transitions. [2020-12-23 13:02:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:02:24,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:24,865 INFO L225 Difference]: With dead ends: 348 [2020-12-23 13:02:24,866 INFO L226 Difference]: Without dead ends: 335 [2020-12-23 13:02:24,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:02:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-12-23 13:02:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 265. [2020-12-23 13:02:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-23 13:02:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 719 transitions. [2020-12-23 13:02:24,870 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 719 transitions. Word has length 14 [2020-12-23 13:02:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:24,870 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 719 transitions. [2020-12-23 13:02:24,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 719 transitions. [2020-12-23 13:02:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:24,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:24,871 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:25,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:25,072 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 729792449, now seen corresponding path program 124 times [2020-12-23 13:02:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30592778] [2020-12-23 13:02:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:25,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30592778] [2020-12-23 13:02:25,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390491513] [2020-12-23 13:02:25,191 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:25,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:25,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:25,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:25,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:25,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066482383] [2020-12-23 13:02:25,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:25,450 INFO L87 Difference]: Start difference. First operand 265 states and 719 transitions. Second operand 17 states. [2020-12-23 13:02:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:25,791 INFO L93 Difference]: Finished difference Result 344 states and 881 transitions. [2020-12-23 13:02:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:25,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:25,794 INFO L225 Difference]: With dead ends: 344 [2020-12-23 13:02:25,794 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 13:02:25,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:02:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 13:02:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 263. [2020-12-23 13:02:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 13:02:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 717 transitions. [2020-12-23 13:02:25,799 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 717 transitions. Word has length 14 [2020-12-23 13:02:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:25,800 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 717 transitions. [2020-12-23 13:02:25,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 717 transitions. [2020-12-23 13:02:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:25,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:25,800 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-12-23 13:02:26,001 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 730397879, now seen corresponding path program 125 times [2020-12-23 13:02:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:26,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722116144] [2020-12-23 13:02:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722116144] [2020-12-23 13:02:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975614509] [2020-12-23 13:02:26,125 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:26,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:26,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:26,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:26,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:26,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:26,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:26,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332942179] [2020-12-23 13:02:26,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:26,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:26,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:26,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:26,419 INFO L87 Difference]: Start difference. First operand 263 states and 717 transitions. Second operand 17 states. [2020-12-23 13:02:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:26,841 INFO L93 Difference]: Finished difference Result 334 states and 863 transitions. [2020-12-23 13:02:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:02:26,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:26,843 INFO L225 Difference]: With dead ends: 334 [2020-12-23 13:02:26,843 INFO L226 Difference]: Without dead ends: 321 [2020-12-23 13:02:26,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-23 13:02:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 263. [2020-12-23 13:02:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 13:02:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 715 transitions. [2020-12-23 13:02:26,848 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 715 transitions. Word has length 14 [2020-12-23 13:02:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 715 transitions. [2020-12-23 13:02:26,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 715 transitions. [2020-12-23 13:02:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:26,849 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:27,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-12-23 13:02:27,050 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash 730417347, now seen corresponding path program 126 times [2020-12-23 13:02:27,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:27,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271003425] [2020-12-23 13:02:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:27,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271003425] [2020-12-23 13:02:27,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724507758] [2020-12-23 13:02:27,166 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:27,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:27,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:27,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:27,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:27,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273353588] [2020-12-23 13:02:27,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:27,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:27,429 INFO L87 Difference]: Start difference. First operand 263 states and 715 transitions. Second operand 17 states. [2020-12-23 13:02:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:28,005 INFO L93 Difference]: Finished difference Result 335 states and 861 transitions. [2020-12-23 13:02:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:02:28,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:28,007 INFO L225 Difference]: With dead ends: 335 [2020-12-23 13:02:28,007 INFO L226 Difference]: Without dead ends: 326 [2020-12-23 13:02:28,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:02:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-23 13:02:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 259. [2020-12-23 13:02:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 13:02:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 704 transitions. [2020-12-23 13:02:28,013 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 704 transitions. Word has length 14 [2020-12-23 13:02:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:28,014 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 704 transitions. [2020-12-23 13:02:28,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 704 transitions. [2020-12-23 13:02:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:28,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:28,014 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:28,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-12-23 13:02:28,230 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash 730419269, now seen corresponding path program 127 times [2020-12-23 13:02:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:28,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561777382] [2020-12-23 13:02:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:28,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561777382] [2020-12-23 13:02:28,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515937814] [2020-12-23 13:02:28,382 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:28,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:28,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:28,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:02:28,677 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:28,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:28,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:28,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542343861] [2020-12-23 13:02:28,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:28,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:28,716 INFO L87 Difference]: Start difference. First operand 259 states and 704 transitions. Second operand 18 states. [2020-12-23 13:02:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:29,467 INFO L93 Difference]: Finished difference Result 419 states and 1029 transitions. [2020-12-23 13:02:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:02:29,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:29,468 INFO L225 Difference]: With dead ends: 419 [2020-12-23 13:02:29,469 INFO L226 Difference]: Without dead ends: 382 [2020-12-23 13:02:29,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-23 13:02:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 254. [2020-12-23 13:02:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-23 13:02:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 687 transitions. [2020-12-23 13:02:29,473 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 687 transitions. Word has length 14 [2020-12-23 13:02:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:29,473 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 687 transitions. [2020-12-23 13:02:29,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 687 transitions. [2020-12-23 13:02:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:29,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:29,474 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:29,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-12-23 13:02:29,675 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:29,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:29,675 INFO L82 PathProgramCache]: Analyzing trace with hash -915650353, now seen corresponding path program 128 times [2020-12-23 13:02:29,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:29,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661263146] [2020-12-23 13:02:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:29,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661263146] [2020-12-23 13:02:29,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217506261] [2020-12-23 13:02:29,836 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:29,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:29,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:29,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:29,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:30,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:30,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:30,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204340342] [2020-12-23 13:02:30,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:30,233 INFO L87 Difference]: Start difference. First operand 254 states and 687 transitions. Second operand 20 states. [2020-12-23 13:02:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:30,789 INFO L93 Difference]: Finished difference Result 347 states and 876 transitions. [2020-12-23 13:02:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:02:30,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:30,792 INFO L225 Difference]: With dead ends: 347 [2020-12-23 13:02:30,792 INFO L226 Difference]: Without dead ends: 344 [2020-12-23 13:02:30,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:02:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-12-23 13:02:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-12-23 13:02:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 13:02:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 696 transitions. [2020-12-23 13:02:30,810 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 696 transitions. Word has length 15 [2020-12-23 13:02:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:30,810 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 696 transitions. [2020-12-23 13:02:30,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 696 transitions. [2020-12-23 13:02:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:30,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:30,811 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:31,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-12-23 13:02:31,027 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash -645743893, now seen corresponding path program 129 times [2020-12-23 13:02:31,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:31,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024328679] [2020-12-23 13:02:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:31,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024328679] [2020-12-23 13:02:31,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410030565] [2020-12-23 13:02:31,187 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:31,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:31,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:31,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:31,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952750432] [2020-12-23 13:02:31,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:31,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:31,569 INFO L87 Difference]: Start difference. First operand 259 states and 696 transitions. Second operand 20 states. [2020-12-23 13:02:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:32,227 INFO L93 Difference]: Finished difference Result 345 states and 872 transitions. [2020-12-23 13:02:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:02:32,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:32,229 INFO L225 Difference]: With dead ends: 345 [2020-12-23 13:02:32,229 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 13:02:32,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 13:02:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 261. [2020-12-23 13:02:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 13:02:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 702 transitions. [2020-12-23 13:02:32,234 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 702 transitions. Word has length 15 [2020-12-23 13:02:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:32,235 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 702 transitions. [2020-12-23 13:02:32,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 702 transitions. [2020-12-23 13:02:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:32,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:32,235 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:32,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-12-23 13:02:32,436 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash -645138463, now seen corresponding path program 130 times [2020-12-23 13:02:32,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:32,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121671299] [2020-12-23 13:02:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:32,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121671299] [2020-12-23 13:02:32,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941698700] [2020-12-23 13:02:32,593 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:32,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:32,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:32,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625957073] [2020-12-23 13:02:32,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:32,951 INFO L87 Difference]: Start difference. First operand 261 states and 702 transitions. Second operand 20 states. [2020-12-23 13:02:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:33,745 INFO L93 Difference]: Finished difference Result 344 states and 877 transitions. [2020-12-23 13:02:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:02:33,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:33,748 INFO L225 Difference]: With dead ends: 344 [2020-12-23 13:02:33,748 INFO L226 Difference]: Without dead ends: 341 [2020-12-23 13:02:33,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-23 13:02:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 265. [2020-12-23 13:02:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-23 13:02:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 714 transitions. [2020-12-23 13:02:33,753 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 714 transitions. Word has length 15 [2020-12-23 13:02:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:33,754 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 714 transitions. [2020-12-23 13:02:33,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 714 transitions. [2020-12-23 13:02:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:33,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:33,754 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:33,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:33,957 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash -645117073, now seen corresponding path program 131 times [2020-12-23 13:02:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:33,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280929442] [2020-12-23 13:02:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:34,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280929442] [2020-12-23 13:02:34,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678185424] [2020-12-23 13:02:34,102 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:34,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:34,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:34,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:02:34,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:34,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:34,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:34,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:34,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919543488] [2020-12-23 13:02:34,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:34,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:34,509 INFO L87 Difference]: Start difference. First operand 265 states and 714 transitions. Second operand 20 states. [2020-12-23 13:02:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:35,561 INFO L93 Difference]: Finished difference Result 458 states and 1138 transitions. [2020-12-23 13:02:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:35,563 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:35,564 INFO L225 Difference]: With dead ends: 458 [2020-12-23 13:02:35,564 INFO L226 Difference]: Without dead ends: 446 [2020-12-23 13:02:35,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=439, Invalid=1043, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:02:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-23 13:02:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 261. [2020-12-23 13:02:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 13:02:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 707 transitions. [2020-12-23 13:02:35,571 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 707 transitions. Word has length 15 [2020-12-23 13:02:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:35,571 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 707 transitions. [2020-12-23 13:02:35,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 707 transitions. [2020-12-23 13:02:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:35,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:35,573 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:35,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-23 13:02:35,788 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1203149473, now seen corresponding path program 132 times [2020-12-23 13:02:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:35,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958740298] [2020-12-23 13:02:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:35,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958740298] [2020-12-23 13:02:35,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832297633] [2020-12-23 13:02:35,952 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:36,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:36,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:02:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:36,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:36,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056906386] [2020-12-23 13:02:36,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:36,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:36,355 INFO L87 Difference]: Start difference. First operand 261 states and 707 transitions. Second operand 20 states. [2020-12-23 13:02:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:37,012 INFO L93 Difference]: Finished difference Result 357 states and 898 transitions. [2020-12-23 13:02:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:02:37,014 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:37,014 INFO L225 Difference]: With dead ends: 357 [2020-12-23 13:02:37,015 INFO L226 Difference]: Without dead ends: 355 [2020-12-23 13:02:37,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-12-23 13:02:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 263. [2020-12-23 13:02:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 13:02:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 713 transitions. [2020-12-23 13:02:37,020 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 713 transitions. Word has length 15 [2020-12-23 13:02:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:37,020 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 713 transitions. [2020-12-23 13:02:37,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 713 transitions. [2020-12-23 13:02:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:37,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:37,021 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:37,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:37,223 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1203089891, now seen corresponding path program 133 times [2020-12-23 13:02:37,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:37,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634424322] [2020-12-23 13:02:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:37,408 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 13:02:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634424322] [2020-12-23 13:02:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129082648] [2020-12-23 13:02:37,409 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:37,911 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 13:02:37,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:37,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:37,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457851101] [2020-12-23 13:02:37,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:37,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:37,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:37,913 INFO L87 Difference]: Start difference. First operand 263 states and 713 transitions. Second operand 20 states. [2020-12-23 13:02:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:41,652 INFO L93 Difference]: Finished difference Result 396 states and 982 transitions. [2020-12-23 13:02:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:02:41,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:41,655 INFO L225 Difference]: With dead ends: 396 [2020-12-23 13:02:41,655 INFO L226 Difference]: Without dead ends: 389 [2020-12-23 13:02:41,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-23 13:02:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 268. [2020-12-23 13:02:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-12-23 13:02:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 722 transitions. [2020-12-23 13:02:41,659 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 722 transitions. Word has length 15 [2020-12-23 13:02:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:41,660 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 722 transitions. [2020-12-23 13:02:41,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 722 transitions. [2020-12-23 13:02:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:41,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:41,660 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:41,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:41,861 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1425983805, now seen corresponding path program 134 times [2020-12-23 13:02:41,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:41,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573013712] [2020-12-23 13:02:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:41,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573013712] [2020-12-23 13:02:41,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605263305] [2020-12-23 13:02:41,992 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:42,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:43,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:43,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:43,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339145272] [2020-12-23 13:02:43,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:43,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:43,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2020-12-23 13:02:43,598 INFO L87 Difference]: Start difference. First operand 268 states and 722 transitions. Second operand 20 states. [2020-12-23 13:02:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:46,122 INFO L93 Difference]: Finished difference Result 365 states and 913 transitions. [2020-12-23 13:02:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:46,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:46,123 INFO L225 Difference]: With dead ends: 365 [2020-12-23 13:02:46,124 INFO L226 Difference]: Without dead ends: 363 [2020-12-23 13:02:46,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=267, Invalid=724, Unknown=1, NotChecked=0, Total=992 [2020-12-23 13:02:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-23 13:02:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 268. [2020-12-23 13:02:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-12-23 13:02:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 722 transitions. [2020-12-23 13:02:46,130 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 722 transitions. Word has length 15 [2020-12-23 13:02:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:46,130 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 722 transitions. [2020-12-23 13:02:46,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 722 transitions. [2020-12-23 13:02:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:46,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:46,131 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:46,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:46,332 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1425924223, now seen corresponding path program 135 times [2020-12-23 13:02:46,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:46,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754002677] [2020-12-23 13:02:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:46,506 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 13:02:46,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754002677] [2020-12-23 13:02:46,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927605443] [2020-12-23 13:02:46,507 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:46,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:46,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:46,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:47,096 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 13:02:47,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:47,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:47,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719324608] [2020-12-23 13:02:47,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:47,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:47,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:47,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:47,098 INFO L87 Difference]: Start difference. First operand 268 states and 722 transitions. Second operand 20 states. [2020-12-23 13:02:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:51,294 INFO L93 Difference]: Finished difference Result 393 states and 976 transitions. [2020-12-23 13:02:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:51,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:51,297 INFO L225 Difference]: With dead ends: 393 [2020-12-23 13:02:51,297 INFO L226 Difference]: Without dead ends: 386 [2020-12-23 13:02:51,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-23 13:02:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 268. [2020-12-23 13:02:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-12-23 13:02:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 721 transitions. [2020-12-23 13:02:51,301 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 721 transitions. Word has length 15 [2020-12-23 13:02:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:51,301 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 721 transitions. [2020-12-23 13:02:51,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 721 transitions. [2020-12-23 13:02:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:51,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:51,302 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:51,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:51,503 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1407215475, now seen corresponding path program 136 times [2020-12-23 13:02:51,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:51,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301940461] [2020-12-23 13:02:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301940461] [2020-12-23 13:02:51,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620929850] [2020-12-23 13:02:51,674 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:51,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:51,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:51,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:52,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:52,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375202866] [2020-12-23 13:02:52,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:52,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:52,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:52,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:52,135 INFO L87 Difference]: Start difference. First operand 268 states and 721 transitions. Second operand 20 states. [2020-12-23 13:02:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:53,267 INFO L93 Difference]: Finished difference Result 353 states and 892 transitions. [2020-12-23 13:02:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:02:53,268 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:53,269 INFO L225 Difference]: With dead ends: 353 [2020-12-23 13:02:53,269 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 13:02:53,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 13:02:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 267. [2020-12-23 13:02:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 13:02:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 718 transitions. [2020-12-23 13:02:53,274 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 718 transitions. Word has length 15 [2020-12-23 13:02:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:53,274 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 718 transitions. [2020-12-23 13:02:53,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 718 transitions. [2020-12-23 13:02:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:53,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:53,274 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:53,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-12-23 13:02:53,475 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1406610045, now seen corresponding path program 137 times [2020-12-23 13:02:53,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:53,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220017095] [2020-12-23 13:02:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220017095] [2020-12-23 13:02:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258379949] [2020-12-23 13:02:53,648 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:53,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:53,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:54,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:54,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:54,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344381859] [2020-12-23 13:02:54,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:54,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:54,102 INFO L87 Difference]: Start difference. First operand 267 states and 718 transitions. Second operand 20 states. [2020-12-23 13:02:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:55,275 INFO L93 Difference]: Finished difference Result 344 states and 877 transitions. [2020-12-23 13:02:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:55,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:02:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:55,278 INFO L225 Difference]: With dead ends: 344 [2020-12-23 13:02:55,278 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 13:02:55,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 13:02:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 269. [2020-12-23 13:02:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-23 13:02:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 723 transitions. [2020-12-23 13:02:55,283 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 723 transitions. Word has length 15 [2020-12-23 13:02:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:55,283 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 723 transitions. [2020-12-23 13:02:55,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:02:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 723 transitions. [2020-12-23 13:02:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:02:55,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:55,283 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:55,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-12-23 13:02:55,484 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:55,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1406588655, now seen corresponding path program 138 times [2020-12-23 13:02:55,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:55,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947363274] [2020-12-23 13:02:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:55,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947363274] [2020-12-23 13:02:55,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007674808] [2020-12-23 13:02:55,672 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:55,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:02:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:56,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:56,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 13:02:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:56,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:56,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:02:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325481885] [2020-12-23 13:02:56,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:02:56,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:02:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:02:56,253 INFO L87 Difference]: Start difference. First operand 269 states and 723 transitions. Second operand 20 states. [2020-12-23 13:03:03,171 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-23 13:03:03,716 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 13:03:10,147 WARN L197 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 13:03:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:21,755 INFO L93 Difference]: Finished difference Result 445 states and 1114 transitions. [2020-12-23 13:03:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:03:21,757 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:21,758 INFO L225 Difference]: With dead ends: 445 [2020-12-23 13:03:21,758 INFO L226 Difference]: Without dead ends: 433 [2020-12-23 13:03:21,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=501, Invalid=1217, Unknown=4, NotChecked=0, Total=1722 [2020-12-23 13:03:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-12-23 13:03:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 269. [2020-12-23 13:03:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-23 13:03:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 725 transitions. [2020-12-23 13:03:21,763 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 725 transitions. Word has length 15 [2020-12-23 13:03:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:21,763 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 725 transitions. [2020-12-23 13:03:21,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 725 transitions. [2020-12-23 13:03:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:21,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:21,763 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:21,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-23 13:03:21,964 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:21,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1405368433, now seen corresponding path program 139 times [2020-12-23 13:03:21,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:21,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351479570] [2020-12-23 13:03:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:22,182 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 13:03:22,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351479570] [2020-12-23 13:03:22,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643677649] [2020-12-23 13:03:22,183 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:22,860 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 13:03:22,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:22,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:22,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603902373] [2020-12-23 13:03:22,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:22,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:22,862 INFO L87 Difference]: Start difference. First operand 269 states and 725 transitions. Second operand 20 states. [2020-12-23 13:03:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:31,407 INFO L93 Difference]: Finished difference Result 408 states and 1011 transitions. [2020-12-23 13:03:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:03:31,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:31,410 INFO L225 Difference]: With dead ends: 408 [2020-12-23 13:03:31,410 INFO L226 Difference]: Without dead ends: 401 [2020-12-23 13:03:31,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:03:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-23 13:03:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 271. [2020-12-23 13:03:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 13:03:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 732 transitions. [2020-12-23 13:03:31,416 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 732 transitions. Word has length 15 [2020-12-23 13:03:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:31,416 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 732 transitions. [2020-12-23 13:03:31,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 732 transitions. [2020-12-23 13:03:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:31,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:31,417 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:31,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-23 13:03:31,620 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1404763003, now seen corresponding path program 140 times [2020-12-23 13:03:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:31,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748528702] [2020-12-23 13:03:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:31,873 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 13:03:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748528702] [2020-12-23 13:03:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30174703] [2020-12-23 13:03:31,874 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:31,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:03:31,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:31,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:31,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:32,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:32,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48732947] [2020-12-23 13:03:32,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:32,509 INFO L87 Difference]: Start difference. First operand 271 states and 732 transitions. Second operand 20 states. [2020-12-23 13:03:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:41,327 INFO L93 Difference]: Finished difference Result 398 states and 993 transitions. [2020-12-23 13:03:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:03:41,329 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:41,330 INFO L225 Difference]: With dead ends: 398 [2020-12-23 13:03:41,330 INFO L226 Difference]: Without dead ends: 394 [2020-12-23 13:03:41,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:03:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-23 13:03:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 275. [2020-12-23 13:03:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-23 13:03:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 746 transitions. [2020-12-23 13:03:41,336 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 746 transitions. Word has length 15 [2020-12-23 13:03:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:41,336 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 746 transitions. [2020-12-23 13:03:41,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 746 transitions. [2020-12-23 13:03:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:41,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:41,337 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:41,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:41,538 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:41,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1404743535, now seen corresponding path program 141 times [2020-12-23 13:03:41,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:41,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815053705] [2020-12-23 13:03:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815053705] [2020-12-23 13:03:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492654118] [2020-12-23 13:03:41,830 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:41,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:03:41,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:41,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:03:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:42,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:42,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:03:42,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695579212] [2020-12-23 13:03:42,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:03:42,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:42,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:03:42,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:03:42,274 INFO L87 Difference]: Start difference. First operand 275 states and 746 transitions. Second operand 19 states. [2020-12-23 13:03:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:44,542 INFO L93 Difference]: Finished difference Result 455 states and 1125 transitions. [2020-12-23 13:03:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 13:03:44,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-23 13:03:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:44,546 INFO L225 Difference]: With dead ends: 455 [2020-12-23 13:03:44,546 INFO L226 Difference]: Without dead ends: 440 [2020-12-23 13:03:44,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 13:03:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-12-23 13:03:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 267. [2020-12-23 13:03:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 13:03:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 728 transitions. [2020-12-23 13:03:44,553 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 728 transitions. Word has length 15 [2020-12-23 13:03:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:44,554 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 728 transitions. [2020-12-23 13:03:44,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:03:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 728 transitions. [2020-12-23 13:03:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:44,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:44,555 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:44,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-12-23 13:03:44,771 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1525687601, now seen corresponding path program 142 times [2020-12-23 13:03:44,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:44,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491547979] [2020-12-23 13:03:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:45,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491547979] [2020-12-23 13:03:45,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130253942] [2020-12-23 13:03:45,018 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:45,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:03:45,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:45,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:45,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:45,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458355834] [2020-12-23 13:03:45,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:45,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:45,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:45,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:45,655 INFO L87 Difference]: Start difference. First operand 267 states and 728 transitions. Second operand 20 states. [2020-12-23 13:03:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:46,818 INFO L93 Difference]: Finished difference Result 372 states and 941 transitions. [2020-12-23 13:03:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:03:46,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:46,820 INFO L225 Difference]: With dead ends: 372 [2020-12-23 13:03:46,820 INFO L226 Difference]: Without dead ends: 370 [2020-12-23 13:03:46,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:03:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-23 13:03:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 270. [2020-12-23 13:03:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-23 13:03:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 737 transitions. [2020-12-23 13:03:46,825 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 737 transitions. Word has length 15 [2020-12-23 13:03:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:46,825 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 737 transitions. [2020-12-23 13:03:46,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 737 transitions. [2020-12-23 13:03:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:46,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:46,826 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:47,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:47,027 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1525628019, now seen corresponding path program 143 times [2020-12-23 13:03:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:47,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087242271] [2020-12-23 13:03:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:47,294 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 13:03:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087242271] [2020-12-23 13:03:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876681653] [2020-12-23 13:03:47,295 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:47,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:03:47,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:47,998 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 13:03:47,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:47,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:47,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532762869] [2020-12-23 13:03:47,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:47,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:48,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:48,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:48,000 INFO L87 Difference]: Start difference. First operand 270 states and 737 transitions. Second operand 20 states. [2020-12-23 13:03:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:49,103 INFO L93 Difference]: Finished difference Result 404 states and 1009 transitions. [2020-12-23 13:03:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:03:49,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:49,107 INFO L225 Difference]: With dead ends: 404 [2020-12-23 13:03:49,107 INFO L226 Difference]: Without dead ends: 400 [2020-12-23 13:03:49,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=689, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:03:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-12-23 13:03:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 272. [2020-12-23 13:03:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-23 13:03:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 743 transitions. [2020-12-23 13:03:49,113 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 743 transitions. Word has length 15 [2020-12-23 13:03:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:49,113 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 743 transitions. [2020-12-23 13:03:49,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 743 transitions. [2020-12-23 13:03:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:49,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:49,114 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:49,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:49,316 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1523779055, now seen corresponding path program 144 times [2020-12-23 13:03:49,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:49,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312866375] [2020-12-23 13:03:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:49,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312866375] [2020-12-23 13:03:49,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728404275] [2020-12-23 13:03:49,639 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:49,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:03:49,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:49,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:50,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:50,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:50,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297733434] [2020-12-23 13:03:50,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:50,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:50,176 INFO L87 Difference]: Start difference. First operand 272 states and 743 transitions. Second operand 20 states. [2020-12-23 13:03:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:51,110 INFO L93 Difference]: Finished difference Result 384 states and 967 transitions. [2020-12-23 13:03:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:03:51,111 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:51,112 INFO L225 Difference]: With dead ends: 384 [2020-12-23 13:03:51,113 INFO L226 Difference]: Without dead ends: 363 [2020-12-23 13:03:51,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:03:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-23 13:03:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 278. [2020-12-23 13:03:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 13:03:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 746 transitions. [2020-12-23 13:03:51,118 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 746 transitions. Word has length 15 [2020-12-23 13:03:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:51,118 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 746 transitions. [2020-12-23 13:03:51,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 746 transitions. [2020-12-23 13:03:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:51,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:51,119 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:51,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:51,320 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:51,320 INFO L82 PathProgramCache]: Analyzing trace with hash 156382699, now seen corresponding path program 145 times [2020-12-23 13:03:51,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:51,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393732584] [2020-12-23 13:03:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:51,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393732584] [2020-12-23 13:03:51,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809069871] [2020-12-23 13:03:51,544 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:51,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:51,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:52,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:52,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644020514] [2020-12-23 13:03:52,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:52,212 INFO L87 Difference]: Start difference. First operand 278 states and 746 transitions. Second operand 20 states. [2020-12-23 13:03:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:53,484 INFO L93 Difference]: Finished difference Result 385 states and 964 transitions. [2020-12-23 13:03:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:03:53,485 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:53,486 INFO L225 Difference]: With dead ends: 385 [2020-12-23 13:03:53,486 INFO L226 Difference]: Without dead ends: 383 [2020-12-23 13:03:53,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:03:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-23 13:03:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 279. [2020-12-23 13:03:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 13:03:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 749 transitions. [2020-12-23 13:03:53,491 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 749 transitions. Word has length 15 [2020-12-23 13:03:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:53,491 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 749 transitions. [2020-12-23 13:03:53,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 749 transitions. [2020-12-23 13:03:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:53,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:53,491 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:53,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-12-23 13:03:53,692 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 156442281, now seen corresponding path program 146 times [2020-12-23 13:03:53,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:53,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685665606] [2020-12-23 13:03:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:53,981 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 13:03:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685665606] [2020-12-23 13:03:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571348569] [2020-12-23 13:03:53,981 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:54,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:03:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:54,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:54,698 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 13:03:54,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:54,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:54,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058101561] [2020-12-23 13:03:54,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:54,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:54,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:54,700 INFO L87 Difference]: Start difference. First operand 279 states and 749 transitions. Second operand 20 states. [2020-12-23 13:03:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:55,906 INFO L93 Difference]: Finished difference Result 415 states and 1032 transitions. [2020-12-23 13:03:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:03:55,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:55,909 INFO L225 Difference]: With dead ends: 415 [2020-12-23 13:03:55,909 INFO L226 Difference]: Without dead ends: 411 [2020-12-23 13:03:55,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:03:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-23 13:03:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 279. [2020-12-23 13:03:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 13:03:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 749 transitions. [2020-12-23 13:03:55,914 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 749 transitions. Word has length 15 [2020-12-23 13:03:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:55,915 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 749 transitions. [2020-12-23 13:03:55,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 749 transitions. [2020-12-23 13:03:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:55,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:55,915 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:56,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:56,116 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash 158291245, now seen corresponding path program 147 times [2020-12-23 13:03:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:56,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390741334] [2020-12-23 13:03:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:56,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390741334] [2020-12-23 13:03:56,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276692220] [2020-12-23 13:03:56,379 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:56,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:03:56,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:56,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:56,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:56,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787743385] [2020-12-23 13:03:56,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:56,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:56,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:56,938 INFO L87 Difference]: Start difference. First operand 279 states and 749 transitions. Second operand 20 states. [2020-12-23 13:03:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:57,819 INFO L93 Difference]: Finished difference Result 377 states and 949 transitions. [2020-12-23 13:03:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:03:57,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:57,822 INFO L225 Difference]: With dead ends: 377 [2020-12-23 13:03:57,822 INFO L226 Difference]: Without dead ends: 363 [2020-12-23 13:03:57,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:03:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-23 13:03:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 278. [2020-12-23 13:03:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 13:03:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 744 transitions. [2020-12-23 13:03:57,827 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 744 transitions. Word has length 15 [2020-12-23 13:03:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:57,827 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 744 transitions. [2020-12-23 13:03:57,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 744 transitions. [2020-12-23 13:03:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:57,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:57,828 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:58,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-12-23 13:03:58,030 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash 738200929, now seen corresponding path program 148 times [2020-12-23 13:03:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:58,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272336303] [2020-12-23 13:03:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:58,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272336303] [2020-12-23 13:03:58,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144874494] [2020-12-23 13:03:58,263 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:58,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:03:58,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:59,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:59,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:59,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595256020] [2020-12-23 13:03:59,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:59,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:59,041 INFO L87 Difference]: Start difference. First operand 278 states and 744 transitions. Second operand 20 states. [2020-12-23 13:04:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:00,798 INFO L93 Difference]: Finished difference Result 384 states and 959 transitions. [2020-12-23 13:04:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:04:00,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:00,801 INFO L225 Difference]: With dead ends: 384 [2020-12-23 13:04:00,801 INFO L226 Difference]: Without dead ends: 382 [2020-12-23 13:04:00,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=407, Invalid=1075, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:04:00,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-23 13:04:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 278. [2020-12-23 13:04:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 13:04:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 744 transitions. [2020-12-23 13:04:00,806 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 744 transitions. Word has length 15 [2020-12-23 13:04:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:00,806 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 744 transitions. [2020-12-23 13:04:00,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 744 transitions. [2020-12-23 13:04:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:00,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:00,807 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:01,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:01,008 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:01,008 INFO L82 PathProgramCache]: Analyzing trace with hash 738260511, now seen corresponding path program 149 times [2020-12-23 13:04:01,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:01,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958346556] [2020-12-23 13:04:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:01,271 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 13:04:01,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958346556] [2020-12-23 13:04:01,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538866903] [2020-12-23 13:04:01,271 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:01,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:04:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:02,041 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 13:04:02,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:02,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:02,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648037763] [2020-12-23 13:04:02,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:02,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:02,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:02,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:02,043 INFO L87 Difference]: Start difference. First operand 278 states and 744 transitions. Second operand 20 states. [2020-12-23 13:04:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:03,657 INFO L93 Difference]: Finished difference Result 430 states and 1054 transitions. [2020-12-23 13:04:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:04:03,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:03,661 INFO L225 Difference]: With dead ends: 430 [2020-12-23 13:04:03,661 INFO L226 Difference]: Without dead ends: 426 [2020-12-23 13:04:03,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:04:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-23 13:04:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 279. [2020-12-23 13:04:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 13:04:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 746 transitions. [2020-12-23 13:04:03,667 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 746 transitions. Word has length 15 [2020-12-23 13:04:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:03,667 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 746 transitions. [2020-12-23 13:04:03,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 746 transitions. [2020-12-23 13:04:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:03,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:03,668 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:03,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-12-23 13:04:03,869 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash 756969259, now seen corresponding path program 150 times [2020-12-23 13:04:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923783219] [2020-12-23 13:04:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923783219] [2020-12-23 13:04:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587154846] [2020-12-23 13:04:04,108 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:04,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:04:04,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:04,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:04,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044971598] [2020-12-23 13:04:04,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:04,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:04,751 INFO L87 Difference]: Start difference. First operand 279 states and 746 transitions. Second operand 20 states. [2020-12-23 13:04:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:06,788 INFO L93 Difference]: Finished difference Result 386 states and 964 transitions. [2020-12-23 13:04:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:04:06,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:06,792 INFO L225 Difference]: With dead ends: 386 [2020-12-23 13:04:06,792 INFO L226 Difference]: Without dead ends: 384 [2020-12-23 13:04:06,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:04:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-23 13:04:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 278. [2020-12-23 13:04:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 13:04:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 743 transitions. [2020-12-23 13:04:06,798 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 743 transitions. Word has length 15 [2020-12-23 13:04:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:06,798 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 743 transitions. [2020-12-23 13:04:06,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 743 transitions. [2020-12-23 13:04:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:06,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:06,799 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:06,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-12-23 13:04:06,999 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash 757574689, now seen corresponding path program 151 times [2020-12-23 13:04:07,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925808152] [2020-12-23 13:04:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925808152] [2020-12-23 13:04:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163823021] [2020-12-23 13:04:07,259 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:07,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:07,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:07,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896786757] [2020-12-23 13:04:07,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:07,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:07,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:07,899 INFO L87 Difference]: Start difference. First operand 278 states and 743 transitions. Second operand 20 states. [2020-12-23 13:04:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:09,725 INFO L93 Difference]: Finished difference Result 355 states and 903 transitions. [2020-12-23 13:04:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:04:09,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:09,729 INFO L225 Difference]: With dead ends: 355 [2020-12-23 13:04:09,729 INFO L226 Difference]: Without dead ends: 353 [2020-12-23 13:04:09,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=500, Invalid=1140, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:04:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-12-23 13:04:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 280. [2020-12-23 13:04:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-23 13:04:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 748 transitions. [2020-12-23 13:04:09,736 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 748 transitions. Word has length 15 [2020-12-23 13:04:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:09,736 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 748 transitions. [2020-12-23 13:04:09,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 748 transitions. [2020-12-23 13:04:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:09,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:09,736 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:09,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:09,937 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:09,938 INFO L82 PathProgramCache]: Analyzing trace with hash 757596079, now seen corresponding path program 152 times [2020-12-23 13:04:09,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:09,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516145334] [2020-12-23 13:04:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:10,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516145334] [2020-12-23 13:04:10,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54216452] [2020-12-23 13:04:10,236 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:10,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:04:10,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:10,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:04:10,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:04:10,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:04:10,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:10,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:10,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:04:10,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:10,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:10,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37295847] [2020-12-23 13:04:10,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:10,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:10,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:10,938 INFO L87 Difference]: Start difference. First operand 280 states and 748 transitions. Second operand 20 states. [2020-12-23 13:04:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:14,103 INFO L93 Difference]: Finished difference Result 475 states and 1188 transitions. [2020-12-23 13:04:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:04:14,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:14,106 INFO L225 Difference]: With dead ends: 475 [2020-12-23 13:04:14,106 INFO L226 Difference]: Without dead ends: 463 [2020-12-23 13:04:14,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=645, Invalid=1611, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 13:04:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-23 13:04:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 276. [2020-12-23 13:04:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-23 13:04:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 736 transitions. [2020-12-23 13:04:14,111 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 736 transitions. Word has length 15 [2020-12-23 13:04:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:14,112 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 736 transitions. [2020-12-23 13:04:14,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 736 transitions. [2020-12-23 13:04:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:14,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:14,112 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:14,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:14,316 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash 758816301, now seen corresponding path program 153 times [2020-12-23 13:04:14,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:14,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964178453] [2020-12-23 13:04:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:14,626 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 13:04:14,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964178453] [2020-12-23 13:04:14,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371698088] [2020-12-23 13:04:14,627 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:14,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:04:14,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:15,351 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 13:04:15,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:15,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:15,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710613616] [2020-12-23 13:04:15,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:15,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:15,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:15,355 INFO L87 Difference]: Start difference. First operand 276 states and 736 transitions. Second operand 20 states. [2020-12-23 13:04:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:17,326 INFO L93 Difference]: Finished difference Result 452 states and 1105 transitions. [2020-12-23 13:04:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:04:17,329 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:17,330 INFO L225 Difference]: With dead ends: 452 [2020-12-23 13:04:17,330 INFO L226 Difference]: Without dead ends: 448 [2020-12-23 13:04:17,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 13:04:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-23 13:04:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 279. [2020-12-23 13:04:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 13:04:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 748 transitions. [2020-12-23 13:04:17,337 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 748 transitions. Word has length 15 [2020-12-23 13:04:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:17,337 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 748 transitions. [2020-12-23 13:04:17,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 748 transitions. [2020-12-23 13:04:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:17,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:17,338 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:17,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-12-23 13:04:17,539 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash 759421731, now seen corresponding path program 154 times [2020-12-23 13:04:17,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:17,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051406152] [2020-12-23 13:04:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:17,847 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 13:04:17,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051406152] [2020-12-23 13:04:17,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330857165] [2020-12-23 13:04:17,848 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:17,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:04:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:18,594 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 13:04:18,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:18,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533689639] [2020-12-23 13:04:18,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:18,596 INFO L87 Difference]: Start difference. First operand 279 states and 748 transitions. Second operand 20 states. [2020-12-23 13:04:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:20,862 INFO L93 Difference]: Finished difference Result 422 states and 1053 transitions. [2020-12-23 13:04:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:04:20,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:20,866 INFO L225 Difference]: With dead ends: 422 [2020-12-23 13:04:20,866 INFO L226 Difference]: Without dead ends: 418 [2020-12-23 13:04:20,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=485, Invalid=1155, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:04:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-23 13:04:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 283. [2020-12-23 13:04:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-23 13:04:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 762 transitions. [2020-12-23 13:04:20,871 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 762 transitions. Word has length 15 [2020-12-23 13:04:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:20,871 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 762 transitions. [2020-12-23 13:04:20,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 762 transitions. [2020-12-23 13:04:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:20,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:20,872 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:21,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:21,073 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 759441199, now seen corresponding path program 155 times [2020-12-23 13:04:21,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:21,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405501070] [2020-12-23 13:04:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:21,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405501070] [2020-12-23 13:04:21,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341310524] [2020-12-23 13:04:21,402 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:21,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:04:21,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:21,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:22,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:22,074 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:04:22,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:22,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:22,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:22,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262507148] [2020-12-23 13:04:22,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:22,144 INFO L87 Difference]: Start difference. First operand 283 states and 762 transitions. Second operand 20 states. [2020-12-23 13:04:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:25,457 INFO L93 Difference]: Finished difference Result 508 states and 1262 transitions. [2020-12-23 13:04:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 13:04:25,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:25,462 INFO L225 Difference]: With dead ends: 508 [2020-12-23 13:04:25,462 INFO L226 Difference]: Without dead ends: 490 [2020-12-23 13:04:25,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=759, Invalid=1893, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 13:04:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-12-23 13:04:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 272. [2020-12-23 13:04:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-23 13:04:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 723 transitions. [2020-12-23 13:04:25,468 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 723 transitions. Word has length 15 [2020-12-23 13:04:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:25,469 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 723 transitions. [2020-12-23 13:04:25,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 723 transitions. [2020-12-23 13:04:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:25,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:25,469 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:25,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:25,670 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash 795520735, now seen corresponding path program 156 times [2020-12-23 13:04:25,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:25,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549033148] [2020-12-23 13:04:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:26,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549033148] [2020-12-23 13:04:26,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144283003] [2020-12-23 13:04:26,001 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:26,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:04:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:26,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:26,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471559171] [2020-12-23 13:04:26,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:26,620 INFO L87 Difference]: Start difference. First operand 272 states and 723 transitions. Second operand 20 states.