/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-14 23:56:10,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-14 23:56:10,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-14 23:56:10,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-14 23:56:10,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-14 23:56:10,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-14 23:56:10,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-14 23:56:10,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-14 23:56:10,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-14 23:56:10,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-14 23:56:10,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-14 23:56:10,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-14 23:56:10,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-14 23:56:10,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-14 23:56:10,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-14 23:56:10,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-14 23:56:10,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-14 23:56:10,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-14 23:56:10,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-14 23:56:10,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-14 23:56:10,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-14 23:56:10,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-14 23:56:10,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-14 23:56:10,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-14 23:56:10,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-14 23:56:10,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-14 23:56:10,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-14 23:56:10,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-14 23:56:10,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-14 23:56:10,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-14 23:56:10,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-14 23:56:10,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-14 23:56:10,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-14 23:56:10,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-14 23:56:10,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-14 23:56:10,583 INFO L138 SettingsManager]: * Use SBE=true [2021-04-14 23:56:10,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-14 23:56:10,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-14 23:56:10,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-14 23:56:10,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-14 23:56:10,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-14 23:56:10,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-14 23:56:10,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-14 23:56:10,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-14 23:56:10,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-14 23:56:10,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-14 23:56:10,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-14 23:56:10,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-14 23:56:10,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-14 23:56:10,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-14 23:56:10,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-14 23:56:10,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-14 23:56:10,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-14 23:56:10,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-14 23:56:10,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-14 23:56:10,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-14 23:56:10,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-14 23:56:10,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-14 23:56:10,587 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-14 23:56:10,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-14 23:56:10,587 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-14 23:56:10,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-14 23:56:10,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-14 23:56:10,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-14 23:56:10,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-14 23:56:10,905 INFO L275 PluginConnector]: CDTParser initialized [2021-04-14 23:56:10,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-04-14 23:56:10,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/896d1b8dc/27110e58e5674cff8888a32283de99a7/FLAG19281af67 [2021-04-14 23:56:11,500 INFO L306 CDTParser]: Found 1 translation units. [2021-04-14 23:56:11,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-04-14 23:56:11,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/896d1b8dc/27110e58e5674cff8888a32283de99a7/FLAG19281af67 [2021-04-14 23:56:11,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/896d1b8dc/27110e58e5674cff8888a32283de99a7 [2021-04-14 23:56:11,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-14 23:56:11,990 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-14 23:56:11,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-14 23:56:11,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-14 23:56:11,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-14 23:56:11,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 11:56:11" (1/1) ... [2021-04-14 23:56:11,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625a721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:11, skipping insertion in model container [2021-04-14 23:56:11,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 11:56:11" (1/1) ... [2021-04-14 23:56:12,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-14 23:56:12,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-14 23:56:12,329 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-04-14 23:56:12,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-14 23:56:12,340 INFO L203 MainTranslator]: Completed pre-run [2021-04-14 23:56:12,400 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-04-14 23:56:12,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-14 23:56:12,469 INFO L208 MainTranslator]: Completed translation [2021-04-14 23:56:12,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12 WrapperNode [2021-04-14 23:56:12,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-14 23:56:12,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-14 23:56:12,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-14 23:56:12,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-14 23:56:12,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-14 23:56:12,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-14 23:56:12,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-14 23:56:12,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-14 23:56:12,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... [2021-04-14 23:56:12,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-14 23:56:12,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-14 23:56:12,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-14 23:56:12,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-14 23:56:12,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-14 23:56:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-04-14 23:56:12,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-04-14 23:56:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-04-14 23:56:12,635 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-04-14 23:56:12,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-14 23:56:12,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-04-14 23:56:12,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-14 23:56:12,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-14 23:56:12,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-14 23:56:12,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-04-14 23:56:12,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-14 23:56:12,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-14 23:56:12,639 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-14 23:56:12,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-14 23:56:12,979 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-04-14 23:56:12,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.04 11:56:12 BoogieIcfgContainer [2021-04-14 23:56:12,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-14 23:56:12,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-14 23:56:12,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-14 23:56:12,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-14 23:56:12,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 11:56:11" (1/3) ... [2021-04-14 23:56:12,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d66ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 11:56:12, skipping insertion in model container [2021-04-14 23:56:12,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 11:56:12" (2/3) ... [2021-04-14 23:56:12,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d66ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 11:56:12, skipping insertion in model container [2021-04-14 23:56:12,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.04 11:56:12" (3/3) ... [2021-04-14 23:56:12,986 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-04-14 23:56:12,990 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-14 23:56:12,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-14 23:56:12,995 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-14 23:56:12,995 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-14 23:56:13,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,016 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,019 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,021 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,022 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,026 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,026 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,027 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,027 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,027 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,027 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-14 23:56:13,028 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-04-14 23:56:13,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-14 23:56:13,054 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-14 23:56:13,054 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-14 23:56:13,054 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-14 23:56:13,054 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-14 23:56:13,054 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-14 23:56:13,055 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-14 23:56:13,055 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-14 23:56:13,055 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-14 23:56:13,062 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 60 transitions, 130 flow [2021-04-14 23:56:13,132 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-14 23:56:13,145 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:13,145 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:13,146 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 962891533, now seen corresponding path program 1 times [2021-04-14 23:56:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:13,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195687634] [2021-04-14 23:56:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:13,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195687634] [2021-04-14 23:56:13,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:13,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-14 23:56:13,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726844388] [2021-04-14 23:56:13,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-14 23:56:13,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-14 23:56:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-14 23:56:13,494 INFO L87 Difference]: Start difference. First operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:13,777 INFO L93 Difference]: Finished difference Result 3048 states and 8864 transitions. [2021-04-14 23:56:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-14 23:56:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-14 23:56:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:13,798 INFO L225 Difference]: With dead ends: 3048 [2021-04-14 23:56:13,799 INFO L226 Difference]: Without dead ends: 1032 [2021-04-14 23:56:13,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-14 23:56:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-04-14 23:56:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 648. [2021-04-14 23:56:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7171561051004636) internal successors, (1758), 647 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1758 transitions. [2021-04-14 23:56:13,873 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1758 transitions. Word has length 26 [2021-04-14 23:56:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:13,874 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1758 transitions. [2021-04-14 23:56:13,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1758 transitions. [2021-04-14 23:56:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-14 23:56:13,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:13,876 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:13,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-14 23:56:13,877 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:13,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1660854806, now seen corresponding path program 1 times [2021-04-14 23:56:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:13,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623828415] [2021-04-14 23:56:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:14,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623828415] [2021-04-14 23:56:14,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:14,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-14 23:56:14,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986201573] [2021-04-14 23:56:14,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-14 23:56:14,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-14 23:56:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-14 23:56:14,016 INFO L87 Difference]: Start difference. First operand 648 states and 1758 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:14,098 INFO L93 Difference]: Finished difference Result 1627 states and 4316 transitions. [2021-04-14 23:56:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-14 23:56:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-14 23:56:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:14,107 INFO L225 Difference]: With dead ends: 1627 [2021-04-14 23:56:14,107 INFO L226 Difference]: Without dead ends: 1371 [2021-04-14 23:56:14,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-14 23:56:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-04-14 23:56:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 822. [2021-04-14 23:56:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.705237515225335) internal successors, (2221), 821 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2221 transitions. [2021-04-14 23:56:14,151 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2221 transitions. Word has length 30 [2021-04-14 23:56:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:14,151 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2221 transitions. [2021-04-14 23:56:14,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2221 transitions. [2021-04-14 23:56:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-14 23:56:14,158 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:14,158 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:14,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-14 23:56:14,158 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1932703408, now seen corresponding path program 2 times [2021-04-14 23:56:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:14,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020396769] [2021-04-14 23:56:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:14,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020396769] [2021-04-14 23:56:14,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:14,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-14 23:56:14,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606988194] [2021-04-14 23:56:14,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-14 23:56:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-14 23:56:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-14 23:56:14,316 INFO L87 Difference]: Start difference. First operand 822 states and 2221 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:14,425 INFO L93 Difference]: Finished difference Result 1099 states and 2837 transitions. [2021-04-14 23:56:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-14 23:56:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-14 23:56:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:14,430 INFO L225 Difference]: With dead ends: 1099 [2021-04-14 23:56:14,430 INFO L226 Difference]: Without dead ends: 774 [2021-04-14 23:56:14,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:56:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-04-14 23:56:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 682. [2021-04-14 23:56:14,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.6637298091042583) internal successors, (1814), 681 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1814 transitions. [2021-04-14 23:56:14,450 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1814 transitions. Word has length 30 [2021-04-14 23:56:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:14,450 INFO L480 AbstractCegarLoop]: Abstraction has 682 states and 1814 transitions. [2021-04-14 23:56:14,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1814 transitions. [2021-04-14 23:56:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:56:14,452 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:14,452 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:14,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-14 23:56:14,452 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash 815370861, now seen corresponding path program 1 times [2021-04-14 23:56:14,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:14,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502739427] [2021-04-14 23:56:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502739427] [2021-04-14 23:56:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:14,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-14 23:56:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397130000] [2021-04-14 23:56:14,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-14 23:56:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-14 23:56:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-14 23:56:14,603 INFO L87 Difference]: Start difference. First operand 682 states and 1814 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:14,714 INFO L93 Difference]: Finished difference Result 1442 states and 3782 transitions. [2021-04-14 23:56:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:56:14,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-14 23:56:14,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:14,720 INFO L225 Difference]: With dead ends: 1442 [2021-04-14 23:56:14,720 INFO L226 Difference]: Without dead ends: 1175 [2021-04-14 23:56:14,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-04-14 23:56:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 727. [2021-04-14 23:56:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.62534435261708) internal successors, (1906), 726 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1906 transitions. [2021-04-14 23:56:14,744 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1906 transitions. Word has length 34 [2021-04-14 23:56:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:14,745 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 1906 transitions. [2021-04-14 23:56:14,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1906 transitions. [2021-04-14 23:56:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:56:14,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:14,754 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:14,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-14 23:56:14,754 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:14,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1916820389, now seen corresponding path program 2 times [2021-04-14 23:56:14,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:14,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006541870] [2021-04-14 23:56:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:14,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006541870] [2021-04-14 23:56:14,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:14,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-14 23:56:14,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700174963] [2021-04-14 23:56:14,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-14 23:56:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-14 23:56:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-04-14 23:56:14,874 INFO L87 Difference]: Start difference. First operand 727 states and 1906 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:14,990 INFO L93 Difference]: Finished difference Result 1881 states and 4916 transitions. [2021-04-14 23:56:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:56:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-14 23:56:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:14,999 INFO L225 Difference]: With dead ends: 1881 [2021-04-14 23:56:14,999 INFO L226 Difference]: Without dead ends: 1614 [2021-04-14 23:56:15,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:56:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-04-14 23:56:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 821. [2021-04-14 23:56:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.7085365853658536) internal successors, (2221), 820 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2221 transitions. [2021-04-14 23:56:15,031 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2221 transitions. Word has length 34 [2021-04-14 23:56:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:15,032 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2221 transitions. [2021-04-14 23:56:15,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2221 transitions. [2021-04-14 23:56:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:56:15,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:15,033 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:15,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-14 23:56:15,034 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:15,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1894477139, now seen corresponding path program 3 times [2021-04-14 23:56:15,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:15,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074527939] [2021-04-14 23:56:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:15,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074527939] [2021-04-14 23:56:15,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:15,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-14 23:56:15,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341789086] [2021-04-14 23:56:15,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-14 23:56:15,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:15,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-14 23:56:15,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-14 23:56:15,124 INFO L87 Difference]: Start difference. First operand 821 states and 2221 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:15,254 INFO L93 Difference]: Finished difference Result 1149 states and 2989 transitions. [2021-04-14 23:56:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:56:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-14 23:56:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:15,258 INFO L225 Difference]: With dead ends: 1149 [2021-04-14 23:56:15,259 INFO L226 Difference]: Without dead ends: 813 [2021-04-14 23:56:15,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-04-14 23:56:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 694. [2021-04-14 23:56:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.6507936507936507) internal successors, (1837), 693 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1837 transitions. [2021-04-14 23:56:15,278 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1837 transitions. Word has length 34 [2021-04-14 23:56:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:15,278 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1837 transitions. [2021-04-14 23:56:15,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1837 transitions. [2021-04-14 23:56:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-14 23:56:15,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:15,279 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:15,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-14 23:56:15,279 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:15,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1589715209, now seen corresponding path program 4 times [2021-04-14 23:56:15,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:15,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72724526] [2021-04-14 23:56:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:15,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72724526] [2021-04-14 23:56:15,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-14 23:56:15,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-14 23:56:15,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536784172] [2021-04-14 23:56:15,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-14 23:56:15,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:15,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-14 23:56:15,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-14 23:56:15,362 INFO L87 Difference]: Start difference. First operand 694 states and 1837 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:15,534 INFO L93 Difference]: Finished difference Result 1146 states and 2975 transitions. [2021-04-14 23:56:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-14 23:56:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-14 23:56:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:15,540 INFO L225 Difference]: With dead ends: 1146 [2021-04-14 23:56:15,540 INFO L226 Difference]: Without dead ends: 922 [2021-04-14 23:56:15,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-04-14 23:56:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 804. [2021-04-14 23:56:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.6986301369863015) internal successors, (2167), 803 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2167 transitions. [2021-04-14 23:56:15,560 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2167 transitions. Word has length 34 [2021-04-14 23:56:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:15,560 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2167 transitions. [2021-04-14 23:56:15,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2167 transitions. [2021-04-14 23:56:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-14 23:56:15,562 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:15,562 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:15,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-14 23:56:15,563 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:15,563 INFO L82 PathProgramCache]: Analyzing trace with hash 583669760, now seen corresponding path program 1 times [2021-04-14 23:56:15,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:15,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520069329] [2021-04-14 23:56:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:15,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520069329] [2021-04-14 23:56:15,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930879920] [2021-04-14 23:56:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-14 23:56:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:15,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:15,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-14 23:56:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674902704] [2021-04-14 23:56:15,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-14 23:56:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-14 23:56:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-14 23:56:15,989 INFO L87 Difference]: Start difference. First operand 804 states and 2167 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:16,079 INFO L93 Difference]: Finished difference Result 1202 states and 3091 transitions. [2021-04-14 23:56:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-14 23:56:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-14 23:56:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:16,084 INFO L225 Difference]: With dead ends: 1202 [2021-04-14 23:56:16,084 INFO L226 Difference]: Without dead ends: 932 [2021-04-14 23:56:16,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-04-14 23:56:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 849. [2021-04-14 23:56:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.661556603773585) internal successors, (2257), 848 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2257 transitions. [2021-04-14 23:56:16,108 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2257 transitions. Word has length 39 [2021-04-14 23:56:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:16,109 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2257 transitions. [2021-04-14 23:56:16,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2257 transitions. [2021-04-14 23:56:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-14 23:56:16,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:16,111 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:16,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-04-14 23:56:16,334 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:16,334 INFO L82 PathProgramCache]: Analyzing trace with hash 550525025, now seen corresponding path program 1 times [2021-04-14 23:56:16,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:16,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244940599] [2021-04-14 23:56:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244940599] [2021-04-14 23:56:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393620083] [2021-04-14 23:56:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-14 23:56:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:16,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:16,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-14 23:56:16,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588293462] [2021-04-14 23:56:16,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:56:16,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:16,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:56:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:56:16,638 INFO L87 Difference]: Start difference. First operand 849 states and 2257 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:16,788 INFO L93 Difference]: Finished difference Result 1701 states and 4409 transitions. [2021-04-14 23:56:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-14 23:56:16,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-14 23:56:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:16,794 INFO L225 Difference]: With dead ends: 1701 [2021-04-14 23:56:16,794 INFO L226 Difference]: Without dead ends: 1277 [2021-04-14 23:56:16,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-04-14 23:56:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1012. [2021-04-14 23:56:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.6340257171117707) internal successors, (2663), 1011 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2663 transitions. [2021-04-14 23:56:16,818 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2663 transitions. Word has length 39 [2021-04-14 23:56:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:16,819 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2663 transitions. [2021-04-14 23:56:16,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2663 transitions. [2021-04-14 23:56:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-04-14 23:56:16,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:16,824 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:17,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:17,046 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash -44610840, now seen corresponding path program 1 times [2021-04-14 23:56:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:17,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730015679] [2021-04-14 23:56:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:17,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730015679] [2021-04-14 23:56:17,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990612103] [2021-04-14 23:56:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-14 23:56:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:17,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:17,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-14 23:56:17,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662356102] [2021-04-14 23:56:17,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:56:17,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:17,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:56:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:56:17,320 INFO L87 Difference]: Start difference. First operand 1012 states and 2663 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:17,523 INFO L93 Difference]: Finished difference Result 1898 states and 4994 transitions. [2021-04-14 23:56:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-14 23:56:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-04-14 23:56:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:17,529 INFO L225 Difference]: With dead ends: 1898 [2021-04-14 23:56:17,529 INFO L226 Difference]: Without dead ends: 1397 [2021-04-14 23:56:17,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:56:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-04-14 23:56:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1142. [2021-04-14 23:56:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.7020157756354077) internal successors, (3083), 1141 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3083 transitions. [2021-04-14 23:56:17,563 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3083 transitions. Word has length 44 [2021-04-14 23:56:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:17,563 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3083 transitions. [2021-04-14 23:56:17,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3083 transitions. [2021-04-14 23:56:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:56:17,565 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:17,565 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:17,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-14 23:56:17,785 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2043440179, now seen corresponding path program 2 times [2021-04-14 23:56:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95991326] [2021-04-14 23:56:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95991326] [2021-04-14 23:56:17,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317645001] [2021-04-14 23:56:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:17,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:56:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:18,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:18,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-04-14 23:56:18,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912110850] [2021-04-14 23:56:18,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:56:18,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:56:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:18,082 INFO L87 Difference]: Start difference. First operand 1142 states and 3083 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:18,248 INFO L93 Difference]: Finished difference Result 2037 states and 5193 transitions. [2021-04-14 23:56:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-14 23:56:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-04-14 23:56:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:18,256 INFO L225 Difference]: With dead ends: 2037 [2021-04-14 23:56:18,257 INFO L226 Difference]: Without dead ends: 1673 [2021-04-14 23:56:18,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:56:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-04-14 23:56:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1219. [2021-04-14 23:56:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.6576354679802954) internal successors, (3237), 1218 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3237 transitions. [2021-04-14 23:56:18,284 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3237 transitions. Word has length 49 [2021-04-14 23:56:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:18,284 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 3237 transitions. [2021-04-14 23:56:18,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3237 transitions. [2021-04-14 23:56:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:56:18,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:18,286 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:18,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:18,501 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1890962021, now seen corresponding path program 3 times [2021-04-14 23:56:18,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:18,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025848940] [2021-04-14 23:56:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025848940] [2021-04-14 23:56:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580189852] [2021-04-14 23:56:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:18,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-14 23:56:18,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-14 23:56:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:18,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:18,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-14 23:56:18,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145094659] [2021-04-14 23:56:18,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:56:18,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:18,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:56:18,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:56:18,757 INFO L87 Difference]: Start difference. First operand 1219 states and 3237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:18,861 INFO L93 Difference]: Finished difference Result 1872 states and 4671 transitions. [2021-04-14 23:56:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-14 23:56:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-04-14 23:56:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:18,867 INFO L225 Difference]: With dead ends: 1872 [2021-04-14 23:56:18,867 INFO L226 Difference]: Without dead ends: 1587 [2021-04-14 23:56:18,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-04-14 23:56:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1199. [2021-04-14 23:56:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.6686143572621037) internal successors, (3197), 1198 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3197 transitions. [2021-04-14 23:56:18,894 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3197 transitions. Word has length 49 [2021-04-14 23:56:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:18,894 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 3197 transitions. [2021-04-14 23:56:18,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3197 transitions. [2021-04-14 23:56:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-14 23:56:18,896 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:18,896 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:19,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-14 23:56:19,109 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1160280110, now seen corresponding path program 4 times [2021-04-14 23:56:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:19,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588673364] [2021-04-14 23:56:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:19,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588673364] [2021-04-14 23:56:19,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19761889] [2021-04-14 23:56:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:19,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:19,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:19,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:56:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:19,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:19,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-04-14 23:56:19,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222396485] [2021-04-14 23:56:19,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:56:19,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:56:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:56:19,398 INFO L87 Difference]: Start difference. First operand 1199 states and 3197 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:19,740 INFO L93 Difference]: Finished difference Result 2427 states and 6313 transitions. [2021-04-14 23:56:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-14 23:56:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-04-14 23:56:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:19,755 INFO L225 Difference]: With dead ends: 2427 [2021-04-14 23:56:19,755 INFO L226 Difference]: Without dead ends: 1732 [2021-04-14 23:56:19,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:56:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-04-14 23:56:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1267. [2021-04-14 23:56:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.6248025276461298) internal successors, (3323), 1266 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 3323 transitions. [2021-04-14 23:56:19,795 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 3323 transitions. Word has length 49 [2021-04-14 23:56:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:19,795 INFO L480 AbstractCegarLoop]: Abstraction has 1267 states and 3323 transitions. [2021-04-14 23:56:19,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 3323 transitions. [2021-04-14 23:56:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:56:19,799 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:19,799 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:20,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:20,021 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:20,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1036953270, now seen corresponding path program 5 times [2021-04-14 23:56:20,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:20,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756703350] [2021-04-14 23:56:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756703350] [2021-04-14 23:56:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191568522] [2021-04-14 23:56:20,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:20,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-14 23:56:20,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-14 23:56:20,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:20,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:20,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-14 23:56:20,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098787415] [2021-04-14 23:56:20,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-14 23:56:20,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:20,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-14 23:56:20,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-14 23:56:20,276 INFO L87 Difference]: Start difference. First operand 1267 states and 3323 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:20,446 INFO L93 Difference]: Finished difference Result 1807 states and 4581 transitions. [2021-04-14 23:56:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-14 23:56:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-04-14 23:56:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:20,458 INFO L225 Difference]: With dead ends: 1807 [2021-04-14 23:56:20,458 INFO L226 Difference]: Without dead ends: 1522 [2021-04-14 23:56:20,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:56:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-04-14 23:56:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1317. [2021-04-14 23:56:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 2.6390577507598785) internal successors, (3473), 1316 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3473 transitions. [2021-04-14 23:56:20,486 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3473 transitions. Word has length 54 [2021-04-14 23:56:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:20,486 INFO L480 AbstractCegarLoop]: Abstraction has 1317 states and 3473 transitions. [2021-04-14 23:56:20,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3473 transitions. [2021-04-14 23:56:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-14 23:56:20,488 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:20,488 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:20,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-14 23:56:20,712 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -579715687, now seen corresponding path program 6 times [2021-04-14 23:56:20,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:20,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260421460] [2021-04-14 23:56:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260421460] [2021-04-14 23:56:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407213740] [2021-04-14 23:56:20,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:20,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-14 23:56:20,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-14 23:56:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:20,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:20,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-14 23:56:20,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775755621] [2021-04-14 23:56:20,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:56:20,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:20,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:56:20,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:20,986 INFO L87 Difference]: Start difference. First operand 1317 states and 3473 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:21,324 INFO L93 Difference]: Finished difference Result 2702 states and 7108 transitions. [2021-04-14 23:56:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:56:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-04-14 23:56:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:21,329 INFO L225 Difference]: With dead ends: 2702 [2021-04-14 23:56:21,329 INFO L226 Difference]: Without dead ends: 2007 [2021-04-14 23:56:21,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2021-04-14 23:56:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-04-14 23:56:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1113. [2021-04-14 23:56:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.678956834532374) internal successors, (2979), 1112 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2979 transitions. [2021-04-14 23:56:21,352 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2979 transitions. Word has length 54 [2021-04-14 23:56:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:21,352 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2979 transitions. [2021-04-14 23:56:21,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2979 transitions. [2021-04-14 23:56:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:56:21,354 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:21,354 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:21,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-14 23:56:21,567 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1583951326, now seen corresponding path program 7 times [2021-04-14 23:56:21,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:21,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008895609] [2021-04-14 23:56:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:21,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008895609] [2021-04-14 23:56:21,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677319782] [2021-04-14 23:56:21,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:56:21,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:21,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:21,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-04-14 23:56:21,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592430036] [2021-04-14 23:56:21,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:21,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:21,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:21,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:21,893 INFO L87 Difference]: Start difference. First operand 1113 states and 2979 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:22,147 INFO L93 Difference]: Finished difference Result 1983 states and 5039 transitions. [2021-04-14 23:56:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-14 23:56:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:56:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:22,151 INFO L225 Difference]: With dead ends: 1983 [2021-04-14 23:56:22,151 INFO L226 Difference]: Without dead ends: 1634 [2021-04-14 23:56:22,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:56:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-04-14 23:56:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1273. [2021-04-14 23:56:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 2.5935534591194966) internal successors, (3299), 1272 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 3299 transitions. [2021-04-14 23:56:22,176 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 3299 transitions. Word has length 59 [2021-04-14 23:56:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:22,176 INFO L480 AbstractCegarLoop]: Abstraction has 1273 states and 3299 transitions. [2021-04-14 23:56:22,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 3299 transitions. [2021-04-14 23:56:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:56:22,180 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:22,180 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:22,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:22,403 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash -678585900, now seen corresponding path program 8 times [2021-04-14 23:56:22,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:22,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267609701] [2021-04-14 23:56:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267609701] [2021-04-14 23:56:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137592610] [2021-04-14 23:56:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:22,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:22,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-14 23:56:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:22,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:22,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-14 23:56:22,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621367571] [2021-04-14 23:56:22,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:56:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:56:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:56:22,679 INFO L87 Difference]: Start difference. First operand 1273 states and 3299 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:22,830 INFO L93 Difference]: Finished difference Result 2197 states and 5361 transitions. [2021-04-14 23:56:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-14 23:56:22,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:56:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:22,834 INFO L225 Difference]: With dead ends: 2197 [2021-04-14 23:56:22,834 INFO L226 Difference]: Without dead ends: 1912 [2021-04-14 23:56:22,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:56:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-04-14 23:56:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1374. [2021-04-14 23:56:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.6125273124544792) internal successors, (3587), 1373 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 3587 transitions. [2021-04-14 23:56:22,859 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 3587 transitions. Word has length 59 [2021-04-14 23:56:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:22,859 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 3587 transitions. [2021-04-14 23:56:22,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 3587 transitions. [2021-04-14 23:56:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:56:22,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:22,861 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:23,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:23,081 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1386346932, now seen corresponding path program 9 times [2021-04-14 23:56:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:23,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795599170] [2021-04-14 23:56:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:23,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795599170] [2021-04-14 23:56:23,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396131387] [2021-04-14 23:56:23,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:23,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-14 23:56:23,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:56:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:23,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:23,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-14 23:56:23,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118096025] [2021-04-14 23:56:23,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-14 23:56:23,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:23,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-14 23:56:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-04-14 23:56:23,347 INFO L87 Difference]: Start difference. First operand 1374 states and 3587 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:23,531 INFO L93 Difference]: Finished difference Result 2247 states and 5561 transitions. [2021-04-14 23:56:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-14 23:56:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:56:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:23,535 INFO L225 Difference]: With dead ends: 2247 [2021-04-14 23:56:23,535 INFO L226 Difference]: Without dead ends: 1962 [2021-04-14 23:56:23,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:56:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-04-14 23:56:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1474. [2021-04-14 23:56:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.6388323150033943) internal successors, (3887), 1473 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3887 transitions. [2021-04-14 23:56:23,563 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3887 transitions. Word has length 59 [2021-04-14 23:56:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:23,563 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3887 transitions. [2021-04-14 23:56:23,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3887 transitions. [2021-04-14 23:56:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-14 23:56:23,566 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:23,566 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:23,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-14 23:56:23,781 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1843584515, now seen corresponding path program 10 times [2021-04-14 23:56:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:23,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347667900] [2021-04-14 23:56:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:23,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347667900] [2021-04-14 23:56:23,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853020174] [2021-04-14 23:56:23,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:23,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:23,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:56:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:24,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:24,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-04-14 23:56:24,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314264317] [2021-04-14 23:56:24,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-14 23:56:24,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-14 23:56:24,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-14 23:56:24,065 INFO L87 Difference]: Start difference. First operand 1474 states and 3887 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:24,420 INFO L93 Difference]: Finished difference Result 2992 states and 7738 transitions. [2021-04-14 23:56:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:56:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-04-14 23:56:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:24,425 INFO L225 Difference]: With dead ends: 2992 [2021-04-14 23:56:24,426 INFO L226 Difference]: Without dead ends: 2297 [2021-04-14 23:56:24,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-04-14 23:56:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-04-14 23:56:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1467. [2021-04-14 23:56:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 2.607776261937244) internal successors, (3823), 1466 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 3823 transitions. [2021-04-14 23:56:24,464 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 3823 transitions. Word has length 59 [2021-04-14 23:56:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:24,465 INFO L480 AbstractCegarLoop]: Abstraction has 1467 states and 3823 transitions. [2021-04-14 23:56:24,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 3823 transitions. [2021-04-14 23:56:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:24,470 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:24,470 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:24,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:24,685 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash -687632775, now seen corresponding path program 11 times [2021-04-14 23:56:24,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:24,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830218221] [2021-04-14 23:56:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830218221] [2021-04-14 23:56:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095152149] [2021-04-14 23:56:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:24,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-14 23:56:24,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:56:24,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:24,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:24,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-14 23:56:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129531070] [2021-04-14 23:56:24,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:56:24,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:56:24,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:56:24,994 INFO L87 Difference]: Start difference. First operand 1467 states and 3823 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:25,218 INFO L93 Difference]: Finished difference Result 2057 states and 5181 transitions. [2021-04-14 23:56:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-14 23:56:25,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-04-14 23:56:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:25,223 INFO L225 Difference]: With dead ends: 2057 [2021-04-14 23:56:25,224 INFO L226 Difference]: Without dead ends: 1772 [2021-04-14 23:56:25,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:56:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-04-14 23:56:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1517. [2021-04-14 23:56:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.620712401055409) internal successors, (3973), 1516 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3973 transitions. [2021-04-14 23:56:25,256 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3973 transitions. Word has length 64 [2021-04-14 23:56:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:25,256 INFO L480 AbstractCegarLoop]: Abstraction has 1517 states and 3973 transitions. [2021-04-14 23:56:25,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3973 transitions. [2021-04-14 23:56:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:25,258 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:25,258 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:25,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-14 23:56:25,481 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash -320511301, now seen corresponding path program 12 times [2021-04-14 23:56:25,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:25,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211248749] [2021-04-14 23:56:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211248749] [2021-04-14 23:56:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60153594] [2021-04-14 23:56:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:25,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-14 23:56:25,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-14 23:56:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:25,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:25,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-14 23:56:25,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33501374] [2021-04-14 23:56:25,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-14 23:56:25,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-14 23:56:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-14 23:56:25,743 INFO L87 Difference]: Start difference. First operand 1517 states and 3973 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:25,987 INFO L93 Difference]: Finished difference Result 2232 states and 5631 transitions. [2021-04-14 23:56:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-14 23:56:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-04-14 23:56:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:25,991 INFO L225 Difference]: With dead ends: 2232 [2021-04-14 23:56:25,991 INFO L226 Difference]: Without dead ends: 1947 [2021-04-14 23:56:25,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-04-14 23:56:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-04-14 23:56:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1617. [2021-04-14 23:56:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 2.6441831683168315) internal successors, (4273), 1616 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 4273 transitions. [2021-04-14 23:56:26,019 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 4273 transitions. Word has length 64 [2021-04-14 23:56:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:26,020 INFO L480 AbstractCegarLoop]: Abstraction has 1617 states and 4273 transitions. [2021-04-14 23:56:26,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 4273 transitions. [2021-04-14 23:56:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-14 23:56:26,022 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:26,022 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:26,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:26,237 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash 136726282, now seen corresponding path program 13 times [2021-04-14 23:56:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:26,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338779097] [2021-04-14 23:56:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338779097] [2021-04-14 23:56:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668241257] [2021-04-14 23:56:26,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:26,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:26,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:26,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:26,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-04-14 23:56:26,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112024999] [2021-04-14 23:56:26,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-14 23:56:26,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-14 23:56:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-14 23:56:26,562 INFO L87 Difference]: Start difference. First operand 1617 states and 4273 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:26,975 INFO L93 Difference]: Finished difference Result 3002 states and 7908 transitions. [2021-04-14 23:56:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-14 23:56:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-04-14 23:56:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:26,980 INFO L225 Difference]: With dead ends: 3002 [2021-04-14 23:56:26,980 INFO L226 Difference]: Without dead ends: 2307 [2021-04-14 23:56:26,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-04-14 23:56:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-04-14 23:56:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1263. [2021-04-14 23:56:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.677496038034865) internal successors, (3379), 1262 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3379 transitions. [2021-04-14 23:56:27,010 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3379 transitions. Word has length 64 [2021-04-14 23:56:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:27,010 INFO L480 AbstractCegarLoop]: Abstraction has 1263 states and 3379 transitions. [2021-04-14 23:56:27,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3379 transitions. [2021-04-14 23:56:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:27,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:27,012 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:27,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-14 23:56:27,233 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:27,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1357502801, now seen corresponding path program 14 times [2021-04-14 23:56:27,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:27,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100617129] [2021-04-14 23:56:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100617129] [2021-04-14 23:56:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324208141] [2021-04-14 23:56:27,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:27,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-14 23:56:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:27,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:27,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-14 23:56:27,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611030244] [2021-04-14 23:56:27,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-14 23:56:27,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-14 23:56:27,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-14 23:56:27,564 INFO L87 Difference]: Start difference. First operand 1263 states and 3379 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:27,839 INFO L93 Difference]: Finished difference Result 2183 states and 5539 transitions. [2021-04-14 23:56:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-14 23:56:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:27,843 INFO L225 Difference]: With dead ends: 2183 [2021-04-14 23:56:27,843 INFO L226 Difference]: Without dead ends: 1834 [2021-04-14 23:56:27,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-04-14 23:56:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-04-14 23:56:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1473. [2021-04-14 23:56:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.5808423913043477) internal successors, (3799), 1472 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 3799 transitions. [2021-04-14 23:56:27,866 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 3799 transitions. Word has length 69 [2021-04-14 23:56:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:27,866 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 3799 transitions. [2021-04-14 23:56:27,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 3799 transitions. [2021-04-14 23:56:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:27,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:27,869 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:28,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-14 23:56:28,085 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1498950275, now seen corresponding path program 15 times [2021-04-14 23:56:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:28,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081145024] [2021-04-14 23:56:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:28,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081145024] [2021-04-14 23:56:28,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500229431] [2021-04-14 23:56:28,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:28,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-14 23:56:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:28,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:28,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-14 23:56:28,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241938820] [2021-04-14 23:56:28,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:56:28,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:28,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:56:28,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:28,373 INFO L87 Difference]: Start difference. First operand 1473 states and 3799 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:28,556 INFO L93 Difference]: Finished difference Result 2547 states and 6161 transitions. [2021-04-14 23:56:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-14 23:56:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:28,560 INFO L225 Difference]: With dead ends: 2547 [2021-04-14 23:56:28,560 INFO L226 Difference]: Without dead ends: 2262 [2021-04-14 23:56:28,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:56:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-04-14 23:56:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1574. [2021-04-14 23:56:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 2.5982199618563255) internal successors, (4087), 1573 states have internal predecessors, (4087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 4087 transitions. [2021-04-14 23:56:28,610 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 4087 transitions. Word has length 69 [2021-04-14 23:56:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:28,610 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 4087 transitions. [2021-04-14 23:56:28,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 4087 transitions. [2021-04-14 23:56:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:28,612 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:28,612 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:28,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:28,813 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:28,813 INFO L82 PathProgramCache]: Analyzing trace with hash 836645475, now seen corresponding path program 16 times [2021-04-14 23:56:28,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:28,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131715449] [2021-04-14 23:56:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:28,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131715449] [2021-04-14 23:56:28,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958996795] [2021-04-14 23:56:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:28,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:29,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:29,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-14 23:56:29,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328497486] [2021-04-14 23:56:29,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:56:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:56:29,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:29,112 INFO L87 Difference]: Start difference. First operand 1574 states and 4087 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:29,328 INFO L93 Difference]: Finished difference Result 2597 states and 6361 transitions. [2021-04-14 23:56:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-14 23:56:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:29,332 INFO L225 Difference]: With dead ends: 2597 [2021-04-14 23:56:29,332 INFO L226 Difference]: Without dead ends: 2312 [2021-04-14 23:56:29,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:56:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-04-14 23:56:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1674. [2021-04-14 23:56:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.6222355050806936) internal successors, (4387), 1673 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4387 transitions. [2021-04-14 23:56:29,361 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4387 transitions. Word has length 69 [2021-04-14 23:56:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:29,361 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4387 transitions. [2021-04-14 23:56:29,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4387 transitions. [2021-04-14 23:56:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:29,365 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:29,365 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:29,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-14 23:56:29,586 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:29,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1203766949, now seen corresponding path program 17 times [2021-04-14 23:56:29,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:29,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007502467] [2021-04-14 23:56:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:29,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007502467] [2021-04-14 23:56:29,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91398117] [2021-04-14 23:56:29,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:29,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-14 23:56:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-14 23:56:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-14 23:56:29,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:29,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-14 23:56:29,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774819593] [2021-04-14 23:56:29,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-14 23:56:29,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:29,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-14 23:56:29,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-14 23:56:29,887 INFO L87 Difference]: Start difference. First operand 1674 states and 4387 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:30,147 INFO L93 Difference]: Finished difference Result 2597 states and 6461 transitions. [2021-04-14 23:56:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-14 23:56:30,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:30,151 INFO L225 Difference]: With dead ends: 2597 [2021-04-14 23:56:30,151 INFO L226 Difference]: Without dead ends: 2312 [2021-04-14 23:56:30,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-04-14 23:56:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-04-14 23:56:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1774. [2021-04-14 23:56:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.643542019176537) internal successors, (4687), 1773 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 4687 transitions. [2021-04-14 23:56:30,181 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 4687 transitions. Word has length 69 [2021-04-14 23:56:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:30,181 INFO L480 AbstractCegarLoop]: Abstraction has 1774 states and 4687 transitions. [2021-04-14 23:56:30,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 4687 transitions. [2021-04-14 23:56:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-14 23:56:30,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:30,184 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:30,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:30,397 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:30,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1661004532, now seen corresponding path program 18 times [2021-04-14 23:56:30,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:30,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003203508] [2021-04-14 23:56:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003203508] [2021-04-14 23:56:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405446111] [2021-04-14 23:56:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:30,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-14 23:56:30,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:30,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-14 23:56:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:30,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:30,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-14 23:56:30,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067575312] [2021-04-14 23:56:30,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-14 23:56:30,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-14 23:56:30,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-14 23:56:30,725 INFO L87 Difference]: Start difference. First operand 1774 states and 4687 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:31,083 INFO L93 Difference]: Finished difference Result 2853 states and 7404 transitions. [2021-04-14 23:56:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:56:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-14 23:56:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:31,086 INFO L225 Difference]: With dead ends: 2853 [2021-04-14 23:56:31,086 INFO L226 Difference]: Without dead ends: 2352 [2021-04-14 23:56:31,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-04-14 23:56:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-04-14 23:56:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1899. [2021-04-14 23:56:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.685458377239199) internal successors, (5097), 1898 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5097 transitions. [2021-04-14 23:56:31,115 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5097 transitions. Word has length 69 [2021-04-14 23:56:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:31,115 INFO L480 AbstractCegarLoop]: Abstraction has 1899 states and 5097 transitions. [2021-04-14 23:56:31,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5097 transitions. [2021-04-14 23:56:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:31,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:31,118 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:31,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-14 23:56:31,333 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:31,333 INFO L82 PathProgramCache]: Analyzing trace with hash 925994951, now seen corresponding path program 19 times [2021-04-14 23:56:31,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:31,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088351885] [2021-04-14 23:56:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:31,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088351885] [2021-04-14 23:56:31,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115715802] [2021-04-14 23:56:31,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-14 23:56:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:31,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:31,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-04-14 23:56:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460948547] [2021-04-14 23:56:31,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:31,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:31,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:31,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:31,708 INFO L87 Difference]: Start difference. First operand 1899 states and 5097 transitions. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:31,973 INFO L93 Difference]: Finished difference Result 2774 states and 7167 transitions. [2021-04-14 23:56:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-14 23:56:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:31,976 INFO L225 Difference]: With dead ends: 2774 [2021-04-14 23:56:31,976 INFO L226 Difference]: Without dead ends: 2440 [2021-04-14 23:56:31,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-04-14 23:56:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-04-14 23:56:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1969. [2021-04-14 23:56:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 2.6610772357723578) internal successors, (5237), 1968 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 5237 transitions. [2021-04-14 23:56:32,010 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 5237 transitions. Word has length 74 [2021-04-14 23:56:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:32,011 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 5237 transitions. [2021-04-14 23:56:32,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 5237 transitions. [2021-04-14 23:56:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:32,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:32,014 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:32,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-14 23:56:32,235 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:32,235 INFO L82 PathProgramCache]: Analyzing trace with hash -782225963, now seen corresponding path program 20 times [2021-04-14 23:56:32,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:32,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544943617] [2021-04-14 23:56:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:32,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544943617] [2021-04-14 23:56:32,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001681627] [2021-04-14 23:56:32,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:32,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-14 23:56:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:32,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:32,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-14 23:56:32,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874289962] [2021-04-14 23:56:32,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-14 23:56:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-14 23:56:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-14 23:56:32,565 INFO L87 Difference]: Start difference. First operand 1969 states and 5237 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:32,772 INFO L93 Difference]: Finished difference Result 3057 states and 7541 transitions. [2021-04-14 23:56:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-14 23:56:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:32,775 INFO L225 Difference]: With dead ends: 3057 [2021-04-14 23:56:32,775 INFO L226 Difference]: Without dead ends: 2787 [2021-04-14 23:56:32,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-04-14 23:56:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-04-14 23:56:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1974. [2021-04-14 23:56:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.6594019260010135) internal successors, (5247), 1973 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5247 transitions. [2021-04-14 23:56:32,806 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5247 transitions. Word has length 74 [2021-04-14 23:56:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:32,807 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 5247 transitions. [2021-04-14 23:56:32,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5247 transitions. [2021-04-14 23:56:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:32,810 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:32,810 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:33,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:33,029 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:33,030 INFO L82 PathProgramCache]: Analyzing trace with hash -859565579, now seen corresponding path program 21 times [2021-04-14 23:56:33,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:33,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221213934] [2021-04-14 23:56:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:33,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221213934] [2021-04-14 23:56:33,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179140790] [2021-04-14 23:56:33,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-14 23:56:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-14 23:56:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:33,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:33,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-14 23:56:33,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271061244] [2021-04-14 23:56:33,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-14 23:56:33,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:33,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-14 23:56:33,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-14 23:56:33,359 INFO L87 Difference]: Start difference. First operand 1974 states and 5247 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:33,600 INFO L93 Difference]: Finished difference Result 3072 states and 7571 transitions. [2021-04-14 23:56:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-14 23:56:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:33,604 INFO L225 Difference]: With dead ends: 3072 [2021-04-14 23:56:33,604 INFO L226 Difference]: Without dead ends: 2772 [2021-04-14 23:56:33,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-04-14 23:56:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-04-14 23:56:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 1974. [2021-04-14 23:56:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.6594019260010135) internal successors, (5247), 1973 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5247 transitions. [2021-04-14 23:56:33,629 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5247 transitions. Word has length 74 [2021-04-14 23:56:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:33,629 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 5247 transitions. [2021-04-14 23:56:33,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5247 transitions. [2021-04-14 23:56:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:33,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:33,632 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:33,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-14 23:56:33,849 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1871091443, now seen corresponding path program 22 times [2021-04-14 23:56:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:33,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616430898] [2021-04-14 23:56:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:33,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616430898] [2021-04-14 23:56:33,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741272865] [2021-04-14 23:56:33,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:34,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:34,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-14 23:56:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:34,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:34,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-14 23:56:34,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88333438] [2021-04-14 23:56:34,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-14 23:56:34,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-14 23:56:34,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-14 23:56:34,156 INFO L87 Difference]: Start difference. First operand 1974 states and 5247 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:34,444 INFO L93 Difference]: Finished difference Result 2922 states and 7271 transitions. [2021-04-14 23:56:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:56:34,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:34,448 INFO L225 Difference]: With dead ends: 2922 [2021-04-14 23:56:34,448 INFO L226 Difference]: Without dead ends: 2622 [2021-04-14 23:56:34,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-04-14 23:56:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-04-14 23:56:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1924. [2021-04-14 23:56:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.6765470618824754) internal successors, (5147), 1923 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5147 transitions. [2021-04-14 23:56:34,482 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5147 transitions. Word has length 74 [2021-04-14 23:56:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:34,482 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5147 transitions. [2021-04-14 23:56:34,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5147 transitions. [2021-04-14 23:56:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:34,484 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:34,485 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:34,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:34,701 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:34,701 INFO L82 PathProgramCache]: Analyzing trace with hash 595435889, now seen corresponding path program 23 times [2021-04-14 23:56:34,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:34,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018926567] [2021-04-14 23:56:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:34,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018926567] [2021-04-14 23:56:34,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111944192] [2021-04-14 23:56:34,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:34,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-14 23:56:34,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-14 23:56:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:35,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:35,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-14 23:56:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818563819] [2021-04-14 23:56:35,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-14 23:56:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-14 23:56:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-14 23:56:35,019 INFO L87 Difference]: Start difference. First operand 1924 states and 5147 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:35,322 INFO L93 Difference]: Finished difference Result 2747 states and 6921 transitions. [2021-04-14 23:56:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-14 23:56:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:35,325 INFO L225 Difference]: With dead ends: 2747 [2021-04-14 23:56:35,326 INFO L226 Difference]: Without dead ends: 2447 [2021-04-14 23:56:35,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-04-14 23:56:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-04-14 23:56:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1874. [2021-04-14 23:56:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1873 states have (on average 2.6946075814201813) internal successors, (5047), 1873 states have internal predecessors, (5047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 5047 transitions. [2021-04-14 23:56:35,347 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 5047 transitions. Word has length 74 [2021-04-14 23:56:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:35,348 INFO L480 AbstractCegarLoop]: Abstraction has 1874 states and 5047 transitions. [2021-04-14 23:56:35,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 5047 transitions. [2021-04-14 23:56:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:35,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:35,350 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:35,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-14 23:56:35,550 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:35,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1751253105, now seen corresponding path program 24 times [2021-04-14 23:56:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:35,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976060038] [2021-04-14 23:56:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:35,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976060038] [2021-04-14 23:56:35,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260447818] [2021-04-14 23:56:35,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:35,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-14 23:56:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:35,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:35,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:35,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-14 23:56:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641085696] [2021-04-14 23:56:35,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-14 23:56:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-14 23:56:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-14 23:56:35,821 INFO L87 Difference]: Start difference. First operand 1874 states and 5047 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:36,176 INFO L93 Difference]: Finished difference Result 3395 states and 8813 transitions. [2021-04-14 23:56:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:56:36,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:36,179 INFO L225 Difference]: With dead ends: 3395 [2021-04-14 23:56:36,179 INFO L226 Difference]: Without dead ends: 3080 [2021-04-14 23:56:36,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-04-14 23:56:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-04-14 23:56:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 1904. [2021-04-14 23:56:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.74198633736206) internal successors, (5218), 1903 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5218 transitions. [2021-04-14 23:56:36,211 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5218 transitions. Word has length 74 [2021-04-14 23:56:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:36,211 INFO L480 AbstractCegarLoop]: Abstraction has 1904 states and 5218 transitions. [2021-04-14 23:56:36,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5218 transitions. [2021-04-14 23:56:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-14 23:56:36,214 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:36,214 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:36,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-14 23:56:36,435 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1091680365, now seen corresponding path program 25 times [2021-04-14 23:56:36,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:36,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584676906] [2021-04-14 23:56:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584676906] [2021-04-14 23:56:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540346150] [2021-04-14 23:56:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:36,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-14 23:56:36,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:36,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:36,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-14 23:56:36,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308930220] [2021-04-14 23:56:36,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:56:36,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:36,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:56:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:36,739 INFO L87 Difference]: Start difference. First operand 1904 states and 5218 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:37,237 INFO L93 Difference]: Finished difference Result 2929 states and 7641 transitions. [2021-04-14 23:56:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:56:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-14 23:56:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:37,240 INFO L225 Difference]: With dead ends: 2929 [2021-04-14 23:56:37,240 INFO L226 Difference]: Without dead ends: 2342 [2021-04-14 23:56:37,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:56:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-04-14 23:56:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1534. [2021-04-14 23:56:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 2.6692759295499022) internal successors, (4092), 1533 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 4092 transitions. [2021-04-14 23:56:37,263 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 4092 transitions. Word has length 74 [2021-04-14 23:56:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:37,263 INFO L480 AbstractCegarLoop]: Abstraction has 1534 states and 4092 transitions. [2021-04-14 23:56:37,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 4092 transitions. [2021-04-14 23:56:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-14 23:56:37,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:37,265 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:37,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-14 23:56:37,486 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:37,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1010320752, now seen corresponding path program 26 times [2021-04-14 23:56:37,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:37,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779957760] [2021-04-14 23:56:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:37,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779957760] [2021-04-14 23:56:37,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963743253] [2021-04-14 23:56:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:37,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:37,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:37,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-14 23:56:37,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451511009] [2021-04-14 23:56:37,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:56:37,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:56:37,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:37,819 INFO L87 Difference]: Start difference. First operand 1534 states and 4092 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:38,067 INFO L93 Difference]: Finished difference Result 2427 states and 6056 transitions. [2021-04-14 23:56:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-14 23:56:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-14 23:56:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:38,070 INFO L225 Difference]: With dead ends: 2427 [2021-04-14 23:56:38,070 INFO L226 Difference]: Without dead ends: 2157 [2021-04-14 23:56:38,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-04-14 23:56:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-04-14 23:56:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1584. [2021-04-14 23:56:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.6797220467466834) internal successors, (4242), 1583 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 4242 transitions. [2021-04-14 23:56:38,097 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 4242 transitions. Word has length 79 [2021-04-14 23:56:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:38,097 INFO L480 AbstractCegarLoop]: Abstraction has 1584 states and 4242 transitions. [2021-04-14 23:56:38,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 4242 transitions. [2021-04-14 23:56:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-14 23:56:38,099 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:38,099 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:38,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:38,299 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:38,300 INFO L82 PathProgramCache]: Analyzing trace with hash 52337166, now seen corresponding path program 27 times [2021-04-14 23:56:38,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:38,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630230014] [2021-04-14 23:56:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630230014] [2021-04-14 23:56:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204640202] [2021-04-14 23:56:38,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:38,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-14 23:56:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:56:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:38,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:38,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-14 23:56:38,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908963875] [2021-04-14 23:56:38,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:56:38,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:56:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:38,632 INFO L87 Difference]: Start difference. First operand 1584 states and 4242 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:38,917 INFO L93 Difference]: Finished difference Result 2702 states and 6706 transitions. [2021-04-14 23:56:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-14 23:56:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-14 23:56:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:38,920 INFO L225 Difference]: With dead ends: 2702 [2021-04-14 23:56:38,920 INFO L226 Difference]: Without dead ends: 2432 [2021-04-14 23:56:38,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-04-14 23:56:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-04-14 23:56:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1684. [2021-04-14 23:56:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 2.698752228163993) internal successors, (4542), 1683 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 4542 transitions. [2021-04-14 23:56:38,940 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 4542 transitions. Word has length 79 [2021-04-14 23:56:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:38,941 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 4542 transitions. [2021-04-14 23:56:38,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 4542 transitions. [2021-04-14 23:56:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-14 23:56:38,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:38,943 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:39,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-14 23:56:39,158 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:39,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1511973108, now seen corresponding path program 28 times [2021-04-14 23:56:39,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:39,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139859001] [2021-04-14 23:56:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:39,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139859001] [2021-04-14 23:56:39,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327261861] [2021-04-14 23:56:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:39,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-14 23:56:39,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:39,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:39,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-14 23:56:39,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671132054] [2021-04-14 23:56:39,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:56:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:56:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:39,474 INFO L87 Difference]: Start difference. First operand 1684 states and 4542 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:39,768 INFO L93 Difference]: Finished difference Result 2702 states and 6806 transitions. [2021-04-14 23:56:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:56:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-14 23:56:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:39,772 INFO L225 Difference]: With dead ends: 2702 [2021-04-14 23:56:39,772 INFO L226 Difference]: Without dead ends: 2432 [2021-04-14 23:56:39,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-04-14 23:56:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-04-14 23:56:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1784. [2021-04-14 23:56:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.7156477846326417) internal successors, (4842), 1783 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 4842 transitions. [2021-04-14 23:56:39,799 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 4842 transitions. Word has length 79 [2021-04-14 23:56:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:39,799 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 4842 transitions. [2021-04-14 23:56:39,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 4842 transitions. [2021-04-14 23:56:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-14 23:56:39,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:39,802 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:40,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:40,024 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1507338634, now seen corresponding path program 29 times [2021-04-14 23:56:40,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:40,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987978707] [2021-04-14 23:56:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:40,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987978707] [2021-04-14 23:56:40,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165682687] [2021-04-14 23:56:40,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:40,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-14 23:56:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-14 23:56:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:40,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:40,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-14 23:56:40,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648290795] [2021-04-14 23:56:40,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:56:40,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:40,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:56:40,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:40,340 INFO L87 Difference]: Start difference. First operand 1784 states and 4842 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:40,666 INFO L93 Difference]: Finished difference Result 2732 states and 6981 transitions. [2021-04-14 23:56:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:56:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-14 23:56:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:40,669 INFO L225 Difference]: With dead ends: 2732 [2021-04-14 23:56:40,669 INFO L226 Difference]: Without dead ends: 2462 [2021-04-14 23:56:40,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-04-14 23:56:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-04-14 23:56:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1884. [2021-04-14 23:56:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.7360594795539033) internal successors, (5152), 1883 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 5152 transitions. [2021-04-14 23:56:40,689 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 5152 transitions. Word has length 79 [2021-04-14 23:56:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:40,689 INFO L480 AbstractCegarLoop]: Abstraction has 1884 states and 5152 transitions. [2021-04-14 23:56:40,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 5152 transitions. [2021-04-14 23:56:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-14 23:56:40,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:40,692 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:40,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-14 23:56:40,892 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash -839350360, now seen corresponding path program 30 times [2021-04-14 23:56:40,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:40,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595271306] [2021-04-14 23:56:40,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:40,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595271306] [2021-04-14 23:56:40,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964863147] [2021-04-14 23:56:40,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:41,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-14 23:56:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:56:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:41,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:41,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-14 23:56:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356288288] [2021-04-14 23:56:41,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-14 23:56:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-14 23:56:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-14 23:56:41,196 INFO L87 Difference]: Start difference. First operand 1884 states and 5152 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:41,652 INFO L93 Difference]: Finished difference Result 3741 states and 9862 transitions. [2021-04-14 23:56:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-14 23:56:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-14 23:56:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:41,656 INFO L225 Difference]: With dead ends: 3741 [2021-04-14 23:56:41,657 INFO L226 Difference]: Without dead ends: 3260 [2021-04-14 23:56:41,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=502, Invalid=1304, Unknown=0, NotChecked=0, Total=1806 [2021-04-14 23:56:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-04-14 23:56:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 2059. [2021-04-14 23:56:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 2.7687074829931975) internal successors, (5698), 2058 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 5698 transitions. [2021-04-14 23:56:41,681 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 5698 transitions. Word has length 79 [2021-04-14 23:56:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:41,681 INFO L480 AbstractCegarLoop]: Abstraction has 2059 states and 5698 transitions. [2021-04-14 23:56:41,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 5698 transitions. [2021-04-14 23:56:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-14 23:56:41,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:41,683 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:41,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-14 23:56:41,883 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash -179777620, now seen corresponding path program 31 times [2021-04-14 23:56:41,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:41,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257488521] [2021-04-14 23:56:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:41,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257488521] [2021-04-14 23:56:41,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645750020] [2021-04-14 23:56:41,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-14 23:56:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:42,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:42,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-04-14 23:56:42,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957269771] [2021-04-14 23:56:42,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:42,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:42,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:42,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:42,215 INFO L87 Difference]: Start difference. First operand 2059 states and 5698 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:42,716 INFO L93 Difference]: Finished difference Result 3179 states and 8356 transitions. [2021-04-14 23:56:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:56:42,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-14 23:56:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:42,719 INFO L225 Difference]: With dead ends: 3179 [2021-04-14 23:56:42,719 INFO L226 Difference]: Without dead ends: 2652 [2021-04-14 23:56:42,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-04-14 23:56:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-04-14 23:56:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1473. [2021-04-14 23:56:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.672554347826087) internal successors, (3934), 1472 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 3934 transitions. [2021-04-14 23:56:42,736 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 3934 transitions. Word has length 79 [2021-04-14 23:56:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:42,736 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 3934 transitions. [2021-04-14 23:56:42,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 3934 transitions. [2021-04-14 23:56:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:42,738 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:42,738 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:42,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-14 23:56:42,938 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash -27827016, now seen corresponding path program 32 times [2021-04-14 23:56:42,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:42,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567668812] [2021-04-14 23:56:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:43,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567668812] [2021-04-14 23:56:43,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886383072] [2021-04-14 23:56:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:43,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:56:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:43,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:43,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-04-14 23:56:43,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401048011] [2021-04-14 23:56:43,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:56:43,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:56:43,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:56:43,290 INFO L87 Difference]: Start difference. First operand 1473 states and 3934 transitions. Second operand has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:43,583 INFO L93 Difference]: Finished difference Result 2413 states and 6134 transitions. [2021-04-14 23:56:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:56:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:43,585 INFO L225 Difference]: With dead ends: 2413 [2021-04-14 23:56:43,585 INFO L226 Difference]: Without dead ends: 2079 [2021-04-14 23:56:43,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-04-14 23:56:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-04-14 23:56:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1558. [2021-04-14 23:56:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 2.6358381502890174) internal successors, (4104), 1557 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 4104 transitions. [2021-04-14 23:56:43,601 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 4104 transitions. Word has length 84 [2021-04-14 23:56:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:43,601 INFO L480 AbstractCegarLoop]: Abstraction has 1558 states and 4104 transitions. [2021-04-14 23:56:43,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 4104 transitions. [2021-04-14 23:56:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:43,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:43,603 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:43,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-14 23:56:43,803 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:43,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2116400826, now seen corresponding path program 33 times [2021-04-14 23:56:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:43,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840032564] [2021-04-14 23:56:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:43,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840032564] [2021-04-14 23:56:43,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300960821] [2021-04-14 23:56:43,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:44,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-14 23:56:44,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:56:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:44,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:44,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128930458] [2021-04-14 23:56:44,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:44,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:44,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:44,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:44,156 INFO L87 Difference]: Start difference. First operand 1558 states and 4104 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:44,399 INFO L93 Difference]: Finished difference Result 2892 states and 6986 transitions. [2021-04-14 23:56:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-14 23:56:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:44,402 INFO L225 Difference]: With dead ends: 2892 [2021-04-14 23:56:44,402 INFO L226 Difference]: Without dead ends: 2622 [2021-04-14 23:56:44,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-04-14 23:56:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-04-14 23:56:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1659. [2021-04-14 23:56:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.6489746682750304) internal successors, (4392), 1658 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 4392 transitions. [2021-04-14 23:56:44,427 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 4392 transitions. Word has length 84 [2021-04-14 23:56:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:44,427 INFO L480 AbstractCegarLoop]: Abstraction has 1659 states and 4392 transitions. [2021-04-14 23:56:44,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 4392 transitions. [2021-04-14 23:56:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:44,429 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:44,430 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:44,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-14 23:56:44,652 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash 692553062, now seen corresponding path program 34 times [2021-04-14 23:56:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:44,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513820698] [2021-04-14 23:56:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:44,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513820698] [2021-04-14 23:56:44,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958414506] [2021-04-14 23:56:44,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:44,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:44,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-14 23:56:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:44,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:44,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:44,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4769665] [2021-04-14 23:56:44,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:44,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:44,966 INFO L87 Difference]: Start difference. First operand 1659 states and 4392 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:45,257 INFO L93 Difference]: Finished difference Result 2877 states and 7056 transitions. [2021-04-14 23:56:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-14 23:56:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:45,260 INFO L225 Difference]: With dead ends: 2877 [2021-04-14 23:56:45,260 INFO L226 Difference]: Without dead ends: 2607 [2021-04-14 23:56:45,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-04-14 23:56:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-04-14 23:56:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1759. [2021-04-14 23:56:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 2.6689419795221845) internal successors, (4692), 1758 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 4692 transitions. [2021-04-14 23:56:45,281 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 4692 transitions. Word has length 84 [2021-04-14 23:56:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:45,281 INFO L480 AbstractCegarLoop]: Abstraction has 1759 states and 4692 transitions. [2021-04-14 23:56:45,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 4692 transitions. [2021-04-14 23:56:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:45,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:45,284 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:45,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-14 23:56:45,484 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1755210980, now seen corresponding path program 35 times [2021-04-14 23:56:45,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:45,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752910344] [2021-04-14 23:56:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:45,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752910344] [2021-04-14 23:56:45,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171133104] [2021-04-14 23:56:45,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:45,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-14 23:56:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-14 23:56:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:45,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:45,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991132789] [2021-04-14 23:56:45,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:45,820 INFO L87 Difference]: Start difference. First operand 1759 states and 4692 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:46,103 INFO L93 Difference]: Finished difference Result 2877 states and 7156 transitions. [2021-04-14 23:56:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-14 23:56:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:46,106 INFO L225 Difference]: With dead ends: 2877 [2021-04-14 23:56:46,106 INFO L226 Difference]: Without dead ends: 2607 [2021-04-14 23:56:46,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-04-14 23:56:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-04-14 23:56:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1859. [2021-04-14 23:56:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 2.6867599569429492) internal successors, (4992), 1858 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 4992 transitions. [2021-04-14 23:56:46,133 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 4992 transitions. Word has length 84 [2021-04-14 23:56:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:46,133 INFO L480 AbstractCegarLoop]: Abstraction has 1859 states and 4992 transitions. [2021-04-14 23:56:46,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 4992 transitions. [2021-04-14 23:56:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:46,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:46,136 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:46,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-04-14 23:56:46,358 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash 190900706, now seen corresponding path program 36 times [2021-04-14 23:56:46,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:46,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482460022] [2021-04-14 23:56:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482460022] [2021-04-14 23:56:46,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419906357] [2021-04-14 23:56:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:46,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-14 23:56:46,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:56:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:46,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:46,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:46,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656809117] [2021-04-14 23:56:46,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:46,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:46,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:46,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:46,644 INFO L87 Difference]: Start difference. First operand 1859 states and 4992 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:47,045 INFO L93 Difference]: Finished difference Result 2877 states and 7256 transitions. [2021-04-14 23:56:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:56:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:47,050 INFO L225 Difference]: With dead ends: 2877 [2021-04-14 23:56:47,050 INFO L226 Difference]: Without dead ends: 2607 [2021-04-14 23:56:47,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-04-14 23:56:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-04-14 23:56:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1959. [2021-04-14 23:56:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 2.702757916241062) internal successors, (5292), 1958 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 5292 transitions. [2021-04-14 23:56:47,079 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 5292 transitions. Word has length 84 [2021-04-14 23:56:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:47,080 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 5292 transitions. [2021-04-14 23:56:47,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 5292 transitions. [2021-04-14 23:56:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:47,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:47,082 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:47,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:47,297 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1084754848, now seen corresponding path program 37 times [2021-04-14 23:56:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:47,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706388215] [2021-04-14 23:56:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706388215] [2021-04-14 23:56:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303721102] [2021-04-14 23:56:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-14 23:56:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:47,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:47,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89956790] [2021-04-14 23:56:47,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:47,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:47,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:47,618 INFO L87 Difference]: Start difference. First operand 1959 states and 5292 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:47,994 INFO L93 Difference]: Finished difference Result 2907 states and 7431 transitions. [2021-04-14 23:56:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:56:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:47,997 INFO L225 Difference]: With dead ends: 2907 [2021-04-14 23:56:47,997 INFO L226 Difference]: Without dead ends: 2637 [2021-04-14 23:56:47,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-04-14 23:56:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-04-14 23:56:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2059. [2021-04-14 23:56:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 2.7220602526724975) internal successors, (5602), 2058 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 5602 transitions. [2021-04-14 23:56:48,017 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 5602 transitions. Word has length 84 [2021-04-14 23:56:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:48,018 INFO L480 AbstractCegarLoop]: Abstraction has 2059 states and 5602 transitions. [2021-04-14 23:56:48,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 5602 transitions. [2021-04-14 23:56:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:48,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:48,020 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:48,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:48,220 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash 863523454, now seen corresponding path program 38 times [2021-04-14 23:56:48,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:48,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880199561] [2021-04-14 23:56:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:48,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880199561] [2021-04-14 23:56:48,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409551950] [2021-04-14 23:56:48,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:48,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:56:48,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:48,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:48,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:48,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463222250] [2021-04-14 23:56:48,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:48,532 INFO L87 Difference]: Start difference. First operand 2059 states and 5602 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:48,986 INFO L93 Difference]: Finished difference Result 3941 states and 10362 transitions. [2021-04-14 23:56:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-14 23:56:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:48,990 INFO L225 Difference]: With dead ends: 3941 [2021-04-14 23:56:48,990 INFO L226 Difference]: Without dead ends: 3460 [2021-04-14 23:56:48,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=516, Invalid=1376, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:56:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-04-14 23:56:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2234. [2021-04-14 23:56:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 2.7532467532467533) internal successors, (6148), 2233 states have internal predecessors, (6148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 6148 transitions. [2021-04-14 23:56:49,023 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 6148 transitions. Word has length 84 [2021-04-14 23:56:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:49,024 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 6148 transitions. [2021-04-14 23:56:49,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 6148 transitions. [2021-04-14 23:56:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-14 23:56:49,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:49,027 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:49,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:49,241 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:49,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1523096194, now seen corresponding path program 39 times [2021-04-14 23:56:49,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:49,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532218315] [2021-04-14 23:56:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532218315] [2021-04-14 23:56:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223098381] [2021-04-14 23:56:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:49,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-14 23:56:49,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:49,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:49,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-14 23:56:49,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030568041] [2021-04-14 23:56:49,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-14 23:56:49,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-14 23:56:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-14 23:56:49,567 INFO L87 Difference]: Start difference. First operand 2234 states and 6148 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:50,098 INFO L93 Difference]: Finished difference Result 3023 states and 7966 transitions. [2021-04-14 23:56:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:56:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-14 23:56:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:50,102 INFO L225 Difference]: With dead ends: 3023 [2021-04-14 23:56:50,102 INFO L226 Difference]: Without dead ends: 2552 [2021-04-14 23:56:50,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:56:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-04-14 23:56:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1624. [2021-04-14 23:56:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.6752926678989524) internal successors, (4342), 1623 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4342 transitions. [2021-04-14 23:56:50,121 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4342 transitions. Word has length 84 [2021-04-14 23:56:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:50,121 INFO L480 AbstractCegarLoop]: Abstraction has 1624 states and 4342 transitions. [2021-04-14 23:56:50,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4342 transitions. [2021-04-14 23:56:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:50,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:50,122 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:50,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-14 23:56:50,323 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1269733311, now seen corresponding path program 40 times [2021-04-14 23:56:50,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:50,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141502442] [2021-04-14 23:56:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:50,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141502442] [2021-04-14 23:56:50,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674143265] [2021-04-14 23:56:50,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:50,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799602245] [2021-04-14 23:56:50,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:50,660 INFO L87 Difference]: Start difference. First operand 1624 states and 4342 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:50,962 INFO L93 Difference]: Finished difference Result 2617 states and 6506 transitions. [2021-04-14 23:56:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:56:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:50,965 INFO L225 Difference]: With dead ends: 2617 [2021-04-14 23:56:50,965 INFO L226 Difference]: Without dead ends: 2347 [2021-04-14 23:56:50,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2021-04-14 23:56:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-04-14 23:56:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1674. [2021-04-14 23:56:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.684997011356844) internal successors, (4492), 1673 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4492 transitions. [2021-04-14 23:56:50,983 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4492 transitions. Word has length 89 [2021-04-14 23:56:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:50,984 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4492 transitions. [2021-04-14 23:56:50,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4492 transitions. [2021-04-14 23:56:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:50,985 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:50,985 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:51,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:51,186 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1066565057, now seen corresponding path program 41 times [2021-04-14 23:56:51,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:51,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30725983] [2021-04-14 23:56:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:51,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30725983] [2021-04-14 23:56:51,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546853169] [2021-04-14 23:56:51,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:51,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-14 23:56:51,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:51,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:51,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:51,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:51,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852410007] [2021-04-14 23:56:51,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:51,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:51,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:51,584 INFO L87 Difference]: Start difference. First operand 1674 states and 4492 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:51,890 INFO L93 Difference]: Finished difference Result 2942 states and 7256 transitions. [2021-04-14 23:56:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:56:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:51,893 INFO L225 Difference]: With dead ends: 2942 [2021-04-14 23:56:51,893 INFO L226 Difference]: Without dead ends: 2672 [2021-04-14 23:56:51,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2021-04-14 23:56:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-14 23:56:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1774. [2021-04-14 23:56:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.7027636773829666) internal successors, (4792), 1773 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 4792 transitions. [2021-04-14 23:56:51,913 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 4792 transitions. Word has length 89 [2021-04-14 23:56:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:51,913 INFO L480 AbstractCegarLoop]: Abstraction has 1774 states and 4792 transitions. [2021-04-14 23:56:51,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 4792 transitions. [2021-04-14 23:56:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:51,914 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:51,914 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:52,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:52,117 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash -3907139, now seen corresponding path program 42 times [2021-04-14 23:56:52,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:52,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949502721] [2021-04-14 23:56:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:52,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949502721] [2021-04-14 23:56:52,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780759772] [2021-04-14 23:56:52,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:52,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-14 23:56:52,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:52,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305186799] [2021-04-14 23:56:52,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:52,478 INFO L87 Difference]: Start difference. First operand 1774 states and 4792 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:52,882 INFO L93 Difference]: Finished difference Result 2942 states and 7356 transitions. [2021-04-14 23:56:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:56:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:52,885 INFO L225 Difference]: With dead ends: 2942 [2021-04-14 23:56:52,885 INFO L226 Difference]: Without dead ends: 2672 [2021-04-14 23:56:52,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2021-04-14 23:56:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-14 23:56:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1874. [2021-04-14 23:56:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1873 states have (on average 2.7186332087560063) internal successors, (5092), 1873 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 5092 transitions. [2021-04-14 23:56:52,907 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 5092 transitions. Word has length 89 [2021-04-14 23:56:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:52,907 INFO L480 AbstractCegarLoop]: Abstraction has 1874 states and 5092 transitions. [2021-04-14 23:56:52,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 5092 transitions. [2021-04-14 23:56:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:52,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:52,910 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:53,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-14 23:56:53,126 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1568217413, now seen corresponding path program 43 times [2021-04-14 23:56:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:53,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628306472] [2021-04-14 23:56:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628306472] [2021-04-14 23:56:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284699823] [2021-04-14 23:56:53,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:53,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:53,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859865144] [2021-04-14 23:56:53,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:53,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:53,434 INFO L87 Difference]: Start difference. First operand 1874 states and 5092 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:53,860 INFO L93 Difference]: Finished difference Result 2942 states and 7456 transitions. [2021-04-14 23:56:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:56:53,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:53,863 INFO L225 Difference]: With dead ends: 2942 [2021-04-14 23:56:53,863 INFO L226 Difference]: Without dead ends: 2672 [2021-04-14 23:56:53,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:56:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-14 23:56:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1974. [2021-04-14 23:56:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.732894069944247) internal successors, (5392), 1973 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5392 transitions. [2021-04-14 23:56:53,889 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5392 transitions. Word has length 89 [2021-04-14 23:56:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:53,890 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 5392 transitions. [2021-04-14 23:56:53,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5392 transitions. [2021-04-14 23:56:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:53,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:53,892 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:54,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-14 23:56:54,092 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1451094329, now seen corresponding path program 44 times [2021-04-14 23:56:54,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:54,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723949501] [2021-04-14 23:56:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723949501] [2021-04-14 23:56:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374419819] [2021-04-14 23:56:54,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:54,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:56:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:54,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:54,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:54,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448592795] [2021-04-14 23:56:54,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:54,421 INFO L87 Difference]: Start difference. First operand 1974 states and 5392 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:54,839 INFO L93 Difference]: Finished difference Result 2942 states and 7556 transitions. [2021-04-14 23:56:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:56:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:54,842 INFO L225 Difference]: With dead ends: 2942 [2021-04-14 23:56:54,842 INFO L226 Difference]: Without dead ends: 2672 [2021-04-14 23:56:54,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2021-04-14 23:56:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-14 23:56:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2074. [2021-04-14 23:56:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.7457790641582247) internal successors, (5692), 2073 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5692 transitions. [2021-04-14 23:56:54,866 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5692 transitions. Word has length 89 [2021-04-14 23:56:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:54,867 INFO L480 AbstractCegarLoop]: Abstraction has 2074 states and 5692 transitions. [2021-04-14 23:56:54,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5692 transitions. [2021-04-14 23:56:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:54,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:54,869 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:55,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-14 23:56:55,073 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -895594665, now seen corresponding path program 45 times [2021-04-14 23:56:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:55,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008312046] [2021-04-14 23:56:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008312046] [2021-04-14 23:56:55,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708550149] [2021-04-14 23:56:55,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:55,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-14 23:56:55,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:55,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:56:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:55,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:55,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:55,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67328749] [2021-04-14 23:56:55,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:55,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:55,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:55,369 INFO L87 Difference]: Start difference. First operand 2074 states and 5692 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:55,832 INFO L93 Difference]: Finished difference Result 3665 states and 9658 transitions. [2021-04-14 23:56:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:56:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:55,835 INFO L225 Difference]: With dead ends: 3665 [2021-04-14 23:56:55,835 INFO L226 Difference]: Without dead ends: 3395 [2021-04-14 23:56:55,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=645, Invalid=1611, Unknown=0, NotChecked=0, Total=2256 [2021-04-14 23:56:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-04-14 23:56:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2249. [2021-04-14 23:56:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 2.7793594306049823) internal successors, (6248), 2248 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 6248 transitions. [2021-04-14 23:56:55,858 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 6248 transitions. Word has length 89 [2021-04-14 23:56:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:55,859 INFO L480 AbstractCegarLoop]: Abstraction has 2249 states and 6248 transitions. [2021-04-14 23:56:55,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 6248 transitions. [2021-04-14 23:56:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-14 23:56:55,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:55,861 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:56,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:56,062 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -236021925, now seen corresponding path program 46 times [2021-04-14 23:56:56,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:56,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710996361] [2021-04-14 23:56:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710996361] [2021-04-14 23:56:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207273290] [2021-04-14 23:56:56,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:56,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:56:56,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-14 23:56:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:56,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:56,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-14 23:56:56,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754833641] [2021-04-14 23:56:56,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:56,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:56,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:56,385 INFO L87 Difference]: Start difference. First operand 2249 states and 6248 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:56,916 INFO L93 Difference]: Finished difference Result 3038 states and 8066 transitions. [2021-04-14 23:56:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:56:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-14 23:56:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:56,919 INFO L225 Difference]: With dead ends: 3038 [2021-04-14 23:56:56,919 INFO L226 Difference]: Without dead ends: 2627 [2021-04-14 23:56:56,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-04-14 23:56:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-04-14 23:56:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1563. [2021-04-14 23:56:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 2.6786171574903967) internal successors, (4184), 1562 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 4184 transitions. [2021-04-14 23:56:56,936 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 4184 transitions. Word has length 89 [2021-04-14 23:56:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:56,936 INFO L480 AbstractCegarLoop]: Abstraction has 1563 states and 4184 transitions. [2021-04-14 23:56:56,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:56,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 4184 transitions. [2021-04-14 23:56:56,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:56:56,938 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:56,938 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:57,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:57,159 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1787854953, now seen corresponding path program 47 times [2021-04-14 23:56:57,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:57,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251460705] [2021-04-14 23:56:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:57,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251460705] [2021-04-14 23:56:57,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751055097] [2021-04-14 23:56:57,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:57,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-14 23:56:57,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:57,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:56:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:57,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:57,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-04-14 23:56:57,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109503407] [2021-04-14 23:56:57,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:56:57,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:57,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:56:57,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:56:57,532 INFO L87 Difference]: Start difference. First operand 1563 states and 4184 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:57,896 INFO L93 Difference]: Finished difference Result 2553 states and 6484 transitions. [2021-04-14 23:56:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-14 23:56:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:56:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:57,898 INFO L225 Difference]: With dead ends: 2553 [2021-04-14 23:56:57,899 INFO L226 Difference]: Without dead ends: 2219 [2021-04-14 23:56:57,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-04-14 23:56:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-04-14 23:56:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1648. [2021-04-14 23:56:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.6435944140862175) internal successors, (4354), 1647 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4354 transitions. [2021-04-14 23:56:57,914 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4354 transitions. Word has length 94 [2021-04-14 23:56:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:57,914 INFO L480 AbstractCegarLoop]: Abstraction has 1648 states and 4354 transitions. [2021-04-14 23:56:57,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4354 transitions. [2021-04-14 23:56:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:56:57,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:57,915 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:58,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:58,116 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash 966888311, now seen corresponding path program 48 times [2021-04-14 23:56:58,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:58,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390317044] [2021-04-14 23:56:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390317044] [2021-04-14 23:56:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956565685] [2021-04-14 23:56:58,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:58,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-14 23:56:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:56:58,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:56:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:58,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:58,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:56:58,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671385672] [2021-04-14 23:56:58,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:58,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:58,454 INFO L87 Difference]: Start difference. First operand 1648 states and 4354 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:58,712 INFO L93 Difference]: Finished difference Result 3132 states and 7536 transitions. [2021-04-14 23:56:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-14 23:56:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:56:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:58,715 INFO L225 Difference]: With dead ends: 3132 [2021-04-14 23:56:58,715 INFO L226 Difference]: Without dead ends: 2862 [2021-04-14 23:56:58,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-04-14 23:56:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2021-04-14 23:56:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 1749. [2021-04-14 23:56:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.6556064073226544) internal successors, (4642), 1748 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4642 transitions. [2021-04-14 23:56:58,733 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4642 transitions. Word has length 94 [2021-04-14 23:56:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:58,733 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4642 transitions. [2021-04-14 23:56:58,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4642 transitions. [2021-04-14 23:56:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:56:58,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:58,735 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:58,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:56:58,935 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:58,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1934237591, now seen corresponding path program 49 times [2021-04-14 23:56:58,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:58,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638908554] [2021-04-14 23:56:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:59,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638908554] [2021-04-14 23:56:59,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544405194] [2021-04-14 23:56:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:56:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:56:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:56:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:59,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:56:59,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:56:59,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68196214] [2021-04-14 23:56:59,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:56:59,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:56:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:56:59,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:56:59,260 INFO L87 Difference]: Start difference. First operand 1749 states and 4642 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:56:59,554 INFO L93 Difference]: Finished difference Result 3117 states and 7606 transitions. [2021-04-14 23:56:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-14 23:56:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:56:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:56:59,556 INFO L225 Difference]: With dead ends: 3117 [2021-04-14 23:56:59,557 INFO L226 Difference]: Without dead ends: 2847 [2021-04-14 23:56:59,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-04-14 23:56:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-04-14 23:56:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1849. [2021-04-14 23:56:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.6742424242424243) internal successors, (4942), 1848 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 4942 transitions. [2021-04-14 23:56:59,575 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 4942 transitions. Word has length 94 [2021-04-14 23:56:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:56:59,576 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 4942 transitions. [2021-04-14 23:56:59,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:56:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 4942 transitions. [2021-04-14 23:56:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:56:59,577 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:56:59,577 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:56:59,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-04-14 23:56:59,778 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:56:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:56:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2137405845, now seen corresponding path program 50 times [2021-04-14 23:56:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:56:59,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047994906] [2021-04-14 23:56:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:56:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:56:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:56:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047994906] [2021-04-14 23:56:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995647437] [2021-04-14 23:56:59,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:00,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:57:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:00,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:00,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:57:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303168121] [2021-04-14 23:57:00,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:57:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:57:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:57:00,131 INFO L87 Difference]: Start difference. First operand 1849 states and 4942 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:00,458 INFO L93 Difference]: Finished difference Result 3117 states and 7706 transitions. [2021-04-14 23:57:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:57:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:57:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:00,461 INFO L225 Difference]: With dead ends: 3117 [2021-04-14 23:57:00,461 INFO L226 Difference]: Without dead ends: 2847 [2021-04-14 23:57:00,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-04-14 23:57:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-04-14 23:57:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1949. [2021-04-14 23:57:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 2.690965092402464) internal successors, (5242), 1948 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 5242 transitions. [2021-04-14 23:57:00,481 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 5242 transitions. Word has length 94 [2021-04-14 23:57:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:00,481 INFO L480 AbstractCegarLoop]: Abstraction has 1949 states and 5242 transitions. [2021-04-14 23:57:00,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 5242 transitions. [2021-04-14 23:57:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:57:00,482 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:00,482 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:00,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:00,683 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1094903533, now seen corresponding path program 51 times [2021-04-14 23:57:00,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:00,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652859348] [2021-04-14 23:57:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:00,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652859348] [2021-04-14 23:57:00,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746924821] [2021-04-14 23:57:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:00,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-14 23:57:00,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:00,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-14 23:57:00,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:01,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:01,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:57:01,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345902965] [2021-04-14 23:57:01,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:57:01,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:57:01,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:57:01,025 INFO L87 Difference]: Start difference. First operand 1949 states and 5242 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:01,406 INFO L93 Difference]: Finished difference Result 3117 states and 7806 transitions. [2021-04-14 23:57:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:57:01,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:57:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:01,410 INFO L225 Difference]: With dead ends: 3117 [2021-04-14 23:57:01,410 INFO L226 Difference]: Without dead ends: 2847 [2021-04-14 23:57:01,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-04-14 23:57:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-04-14 23:57:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2049. [2021-04-14 23:57:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 2.7060546875) internal successors, (5542), 2048 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 5542 transitions. [2021-04-14 23:57:01,431 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 5542 transitions. Word has length 94 [2021-04-14 23:57:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:01,431 INFO L480 AbstractCegarLoop]: Abstraction has 2049 states and 5542 transitions. [2021-04-14 23:57:01,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 5542 transitions. [2021-04-14 23:57:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:57:01,433 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:01,433 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:01,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-14 23:57:01,634 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1635753489, now seen corresponding path program 52 times [2021-04-14 23:57:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:01,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757996557] [2021-04-14 23:57:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:01,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757996557] [2021-04-14 23:57:01,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265426131] [2021-04-14 23:57:01,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:01,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:57:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:01,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:01,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:57:01,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758604978] [2021-04-14 23:57:01,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:57:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:57:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:57:01,964 INFO L87 Difference]: Start difference. First operand 2049 states and 5542 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:02,375 INFO L93 Difference]: Finished difference Result 3117 states and 7906 transitions. [2021-04-14 23:57:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:57:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:57:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:02,378 INFO L225 Difference]: With dead ends: 3117 [2021-04-14 23:57:02,378 INFO L226 Difference]: Without dead ends: 2847 [2021-04-14 23:57:02,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:57:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-04-14 23:57:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2149. [2021-04-14 23:57:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2148 states have (on average 2.7197392923649906) internal successors, (5842), 2148 states have internal predecessors, (5842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 5842 transitions. [2021-04-14 23:57:02,399 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 5842 transitions. Word has length 94 [2021-04-14 23:57:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:02,399 INFO L480 AbstractCegarLoop]: Abstraction has 2149 states and 5842 transitions. [2021-04-14 23:57:02,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 5842 transitions. [2021-04-14 23:57:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:57:02,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:02,401 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:02,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-04-14 23:57:02,602 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 360097935, now seen corresponding path program 53 times [2021-04-14 23:57:02,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:02,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084317561] [2021-04-14 23:57:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084317561] [2021-04-14 23:57:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242863754] [2021-04-14 23:57:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:02,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-14 23:57:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:57:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:02,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:02,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:57:02,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521236214] [2021-04-14 23:57:02,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:57:02,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:02,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:57:02,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:57:02,915 INFO L87 Difference]: Start difference. First operand 2149 states and 5842 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:03,362 INFO L93 Difference]: Finished difference Result 3117 states and 8006 transitions. [2021-04-14 23:57:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:57:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:57:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:03,365 INFO L225 Difference]: With dead ends: 3117 [2021-04-14 23:57:03,365 INFO L226 Difference]: Without dead ends: 2847 [2021-04-14 23:57:03,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-04-14 23:57:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-04-14 23:57:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2249. [2021-04-14 23:57:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 2.73220640569395) internal successors, (6142), 2248 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 6142 transitions. [2021-04-14 23:57:03,389 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 6142 transitions. Word has length 94 [2021-04-14 23:57:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:03,389 INFO L480 AbstractCegarLoop]: Abstraction has 2249 states and 6142 transitions. [2021-04-14 23:57:03,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 6142 transitions. [2021-04-14 23:57:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:57:03,391 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:03,391 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:03,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:03,592 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1986591059, now seen corresponding path program 54 times [2021-04-14 23:57:03,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:03,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997310110] [2021-04-14 23:57:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997310110] [2021-04-14 23:57:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960486330] [2021-04-14 23:57:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:03,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-14 23:57:03,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:03,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:03,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:03,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-14 23:57:03,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458454317] [2021-04-14 23:57:03,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-14 23:57:03,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-14 23:57:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-04-14 23:57:03,903 INFO L87 Difference]: Start difference. First operand 2249 states and 6142 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:04,377 INFO L93 Difference]: Finished difference Result 3865 states and 10158 transitions. [2021-04-14 23:57:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:57:04,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:57:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:04,380 INFO L225 Difference]: With dead ends: 3865 [2021-04-14 23:57:04,380 INFO L226 Difference]: Without dead ends: 3595 [2021-04-14 23:57:04,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-04-14 23:57:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2021-04-14 23:57:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2424. [2021-04-14 23:57:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.7643417251341313) internal successors, (6698), 2423 states have internal predecessors, (6698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6698 transitions. [2021-04-14 23:57:04,405 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6698 transitions. Word has length 94 [2021-04-14 23:57:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:04,405 INFO L480 AbstractCegarLoop]: Abstraction has 2424 states and 6698 transitions. [2021-04-14 23:57:04,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6698 transitions. [2021-04-14 23:57:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-14 23:57:04,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:04,407 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:04,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-14 23:57:04,609 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1327018319, now seen corresponding path program 55 times [2021-04-14 23:57:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:04,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310256486] [2021-04-14 23:57:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:04,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310256486] [2021-04-14 23:57:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747009896] [2021-04-14 23:57:04,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-14 23:57:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-04-14 23:57:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460758668] [2021-04-14 23:57:04,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:04,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:04,911 INFO L87 Difference]: Start difference. First operand 2424 states and 6698 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:05,524 INFO L93 Difference]: Finished difference Result 3263 states and 8616 transitions. [2021-04-14 23:57:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:57:05,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-14 23:57:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:05,528 INFO L225 Difference]: With dead ends: 3263 [2021-04-14 23:57:05,528 INFO L226 Difference]: Without dead ends: 2852 [2021-04-14 23:57:05,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-04-14 23:57:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-04-14 23:57:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1774. [2021-04-14 23:57:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.674562887760857) internal successors, (4742), 1773 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 4742 transitions. [2021-04-14 23:57:05,549 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 4742 transitions. Word has length 94 [2021-04-14 23:57:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:05,549 INFO L480 AbstractCegarLoop]: Abstraction has 1774 states and 4742 transitions. [2021-04-14 23:57:05,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 4742 transitions. [2021-04-14 23:57:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:05,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:05,551 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:05,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:05,758 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash -863605582, now seen corresponding path program 56 times [2021-04-14 23:57:05,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:05,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272569143] [2021-04-14 23:57:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:05,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272569143] [2021-04-14 23:57:05,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038802047] [2021-04-14 23:57:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:06,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:57:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:06,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:06,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:06,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750925592] [2021-04-14 23:57:06,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:06,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:06,171 INFO L87 Difference]: Start difference. First operand 1774 states and 4742 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:06,531 INFO L93 Difference]: Finished difference Result 2867 states and 7106 transitions. [2021-04-14 23:57:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-14 23:57:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:06,533 INFO L225 Difference]: With dead ends: 2867 [2021-04-14 23:57:06,533 INFO L226 Difference]: Without dead ends: 2597 [2021-04-14 23:57:06,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1170, Unknown=0, NotChecked=0, Total=1560 [2021-04-14 23:57:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-04-14 23:57:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1824. [2021-04-14 23:57:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.6834887547997806) internal successors, (4892), 1823 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 4892 transitions. [2021-04-14 23:57:06,554 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 4892 transitions. Word has length 99 [2021-04-14 23:57:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:06,554 INFO L480 AbstractCegarLoop]: Abstraction has 1824 states and 4892 transitions. [2021-04-14 23:57:06,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 4892 transitions. [2021-04-14 23:57:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:06,556 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:06,556 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:06,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-04-14 23:57:06,761 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1979752752, now seen corresponding path program 57 times [2021-04-14 23:57:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:06,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738200541] [2021-04-14 23:57:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:06,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738200541] [2021-04-14 23:57:06,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499501735] [2021-04-14 23:57:06,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:07,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-14 23:57:07,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-14 23:57:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:07,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:07,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:07,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458298046] [2021-04-14 23:57:07,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:07,203 INFO L87 Difference]: Start difference. First operand 1824 states and 4892 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:07,579 INFO L93 Difference]: Finished difference Result 3242 states and 7956 transitions. [2021-04-14 23:57:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:57:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:07,582 INFO L225 Difference]: With dead ends: 3242 [2021-04-14 23:57:07,582 INFO L226 Difference]: Without dead ends: 2972 [2021-04-14 23:57:07,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=441, Invalid=1365, Unknown=0, NotChecked=0, Total=1806 [2021-04-14 23:57:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-04-14 23:57:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 1924. [2021-04-14 23:57:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.699947997919917) internal successors, (5192), 1923 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5192 transitions. [2021-04-14 23:57:07,602 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5192 transitions. Word has length 99 [2021-04-14 23:57:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:07,602 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5192 transitions. [2021-04-14 23:57:07,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5192 transitions. [2021-04-14 23:57:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:07,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:07,604 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:07,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:07,805 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2112046290, now seen corresponding path program 58 times [2021-04-14 23:57:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:07,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074481445] [2021-04-14 23:57:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:07,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074481445] [2021-04-14 23:57:07,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063414426] [2021-04-14 23:57:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:08,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:08,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:57:08,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:08,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:08,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480260369] [2021-04-14 23:57:08,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:08,160 INFO L87 Difference]: Start difference. First operand 1924 states and 5192 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:08,557 INFO L93 Difference]: Finished difference Result 3242 states and 8056 transitions. [2021-04-14 23:57:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:57:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:08,579 INFO L225 Difference]: With dead ends: 3242 [2021-04-14 23:57:08,579 INFO L226 Difference]: Without dead ends: 2972 [2021-04-14 23:57:08,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=481, Invalid=1499, Unknown=0, NotChecked=0, Total=1980 [2021-04-14 23:57:08,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-04-14 23:57:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2024. [2021-04-14 23:57:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.714780029658922) internal successors, (5492), 2023 states have internal predecessors, (5492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5492 transitions. [2021-04-14 23:57:08,599 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5492 transitions. Word has length 99 [2021-04-14 23:57:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:08,599 INFO L480 AbstractCegarLoop]: Abstraction has 2024 states and 5492 transitions. [2021-04-14 23:57:08,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5492 transitions. [2021-04-14 23:57:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:08,600 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:08,601 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:08,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-04-14 23:57:08,801 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:08,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1049388372, now seen corresponding path program 59 times [2021-04-14 23:57:08,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:08,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810172100] [2021-04-14 23:57:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:08,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810172100] [2021-04-14 23:57:08,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487938995] [2021-04-14 23:57:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:09,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-14 23:57:09,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:09,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:57:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:09,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:09,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:09,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175586647] [2021-04-14 23:57:09,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:09,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:09,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:09,165 INFO L87 Difference]: Start difference. First operand 2024 states and 5492 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:09,586 INFO L93 Difference]: Finished difference Result 3242 states and 8156 transitions. [2021-04-14 23:57:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:57:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:09,589 INFO L225 Difference]: With dead ends: 3242 [2021-04-14 23:57:09,590 INFO L226 Difference]: Without dead ends: 2972 [2021-04-14 23:57:09,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=537, Invalid=1625, Unknown=0, NotChecked=0, Total=2162 [2021-04-14 23:57:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-04-14 23:57:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2124. [2021-04-14 23:57:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.728214790390956) internal successors, (5792), 2123 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5792 transitions. [2021-04-14 23:57:09,615 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5792 transitions. Word has length 99 [2021-04-14 23:57:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:09,616 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5792 transitions. [2021-04-14 23:57:09,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5792 transitions. [2021-04-14 23:57:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:09,618 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:09,618 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:09,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:09,821 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:09,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1681268650, now seen corresponding path program 60 times [2021-04-14 23:57:09,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:09,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352506560] [2021-04-14 23:57:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:09,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352506560] [2021-04-14 23:57:09,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165468249] [2021-04-14 23:57:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:10,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-14 23:57:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-14 23:57:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:10,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:10,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:10,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110395934] [2021-04-14 23:57:10,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:10,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:10,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:10,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:10,152 INFO L87 Difference]: Start difference. First operand 2124 states and 5792 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:10,702 INFO L93 Difference]: Finished difference Result 3242 states and 8256 transitions. [2021-04-14 23:57:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:57:10,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:10,705 INFO L225 Difference]: With dead ends: 3242 [2021-04-14 23:57:10,705 INFO L226 Difference]: Without dead ends: 2972 [2021-04-14 23:57:10,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=609, Invalid=1743, Unknown=0, NotChecked=0, Total=2352 [2021-04-14 23:57:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-04-14 23:57:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2224. [2021-04-14 23:57:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.7404408457040037) internal successors, (6092), 2223 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 6092 transitions. [2021-04-14 23:57:10,740 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 6092 transitions. Word has length 99 [2021-04-14 23:57:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:10,741 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 6092 transitions. [2021-04-14 23:57:10,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 6092 transitions. [2021-04-14 23:57:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:10,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:10,742 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:10,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-14 23:57:10,943 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash 405613096, now seen corresponding path program 61 times [2021-04-14 23:57:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:10,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307660709] [2021-04-14 23:57:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:11,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307660709] [2021-04-14 23:57:11,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653611364] [2021-04-14 23:57:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:57:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:11,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:11,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:11,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944050705] [2021-04-14 23:57:11,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:11,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:11,262 INFO L87 Difference]: Start difference. First operand 2224 states and 6092 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:11,753 INFO L93 Difference]: Finished difference Result 3242 states and 8356 transitions. [2021-04-14 23:57:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:57:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:11,757 INFO L225 Difference]: With dead ends: 3242 [2021-04-14 23:57:11,757 INFO L226 Difference]: Without dead ends: 2972 [2021-04-14 23:57:11,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=697, Invalid=1853, Unknown=0, NotChecked=0, Total=2550 [2021-04-14 23:57:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-04-14 23:57:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2324. [2021-04-14 23:57:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.751614291863969) internal successors, (6392), 2323 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6392 transitions. [2021-04-14 23:57:11,780 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6392 transitions. Word has length 99 [2021-04-14 23:57:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:11,781 INFO L480 AbstractCegarLoop]: Abstraction has 2324 states and 6392 transitions. [2021-04-14 23:57:11,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6392 transitions. [2021-04-14 23:57:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:11,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:11,783 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:11,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:11,983 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1941075898, now seen corresponding path program 62 times [2021-04-14 23:57:11,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:11,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697348239] [2021-04-14 23:57:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:12,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697348239] [2021-04-14 23:57:12,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855048505] [2021-04-14 23:57:12,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:12,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:12,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-14 23:57:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:12,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:12,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-14 23:57:12,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516031170] [2021-04-14 23:57:12,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-14 23:57:12,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:12,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-14 23:57:12,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-04-14 23:57:12,345 INFO L87 Difference]: Start difference. First operand 2324 states and 6392 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:12,915 INFO L93 Difference]: Finished difference Result 3965 states and 10458 transitions. [2021-04-14 23:57:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-14 23:57:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:12,919 INFO L225 Difference]: With dead ends: 3965 [2021-04-14 23:57:12,919 INFO L226 Difference]: Without dead ends: 3695 [2021-04-14 23:57:12,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=802, Invalid=1954, Unknown=0, NotChecked=0, Total=2756 [2021-04-14 23:57:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-04-14 23:57:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2499. [2021-04-14 23:57:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.7814251401120895) internal successors, (6948), 2498 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 6948 transitions. [2021-04-14 23:57:12,950 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 6948 transitions. Word has length 99 [2021-04-14 23:57:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:12,950 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 6948 transitions. [2021-04-14 23:57:12,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 6948 transitions. [2021-04-14 23:57:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-04-14 23:57:12,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:12,952 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:13,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-14 23:57:13,153 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1281503158, now seen corresponding path program 63 times [2021-04-14 23:57:13,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:13,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833260035] [2021-04-14 23:57:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:13,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833260035] [2021-04-14 23:57:13,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408134952] [2021-04-14 23:57:13,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:13,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-14 23:57:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:13,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:13,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-04-14 23:57:13,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018214267] [2021-04-14 23:57:13,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:13,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:13,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:13,499 INFO L87 Difference]: Start difference. First operand 2499 states and 6948 transitions. Second operand has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:14,200 INFO L93 Difference]: Finished difference Result 3719 states and 9806 transitions. [2021-04-14 23:57:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-14 23:57:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-04-14 23:57:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:14,205 INFO L225 Difference]: With dead ends: 3719 [2021-04-14 23:57:14,205 INFO L226 Difference]: Without dead ends: 3192 [2021-04-14 23:57:14,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-04-14 23:57:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2021-04-14 23:57:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 2509. [2021-04-14 23:57:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 2.7719298245614037) internal successors, (6952), 2508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 6952 transitions. [2021-04-14 23:57:14,229 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 6952 transitions. Word has length 99 [2021-04-14 23:57:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:14,229 INFO L480 AbstractCegarLoop]: Abstraction has 2509 states and 6952 transitions. [2021-04-14 23:57:14,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 6952 transitions. [2021-04-14 23:57:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:14,231 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:14,231 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:14,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-14 23:57:14,432 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1266453798, now seen corresponding path program 64 times [2021-04-14 23:57:14,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:14,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456556436] [2021-04-14 23:57:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:14,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456556436] [2021-04-14 23:57:14,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265148287] [2021-04-14 23:57:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:14,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:14,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:14,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-04-14 23:57:14,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405463386] [2021-04-14 23:57:14,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-14 23:57:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-14 23:57:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:57:14,842 INFO L87 Difference]: Start difference. First operand 2509 states and 6952 transitions. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:15,235 INFO L93 Difference]: Finished difference Result 3549 states and 9352 transitions. [2021-04-14 23:57:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-14 23:57:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:15,239 INFO L225 Difference]: With dead ends: 3549 [2021-04-14 23:57:15,239 INFO L226 Difference]: Without dead ends: 3215 [2021-04-14 23:57:15,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=540, Invalid=1530, Unknown=0, NotChecked=0, Total=2070 [2021-04-14 23:57:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-04-14 23:57:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2594. [2021-04-14 23:57:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.746625530273814) internal successors, (7122), 2593 states have internal predecessors, (7122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7122 transitions. [2021-04-14 23:57:15,263 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7122 transitions. Word has length 104 [2021-04-14 23:57:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:15,264 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 7122 transitions. [2021-04-14 23:57:15,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7122 transitions. [2021-04-14 23:57:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:15,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:15,266 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:15,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-14 23:57:15,466 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1702591384, now seen corresponding path program 65 times [2021-04-14 23:57:15,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:15,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626555398] [2021-04-14 23:57:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:15,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626555398] [2021-04-14 23:57:15,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7986906] [2021-04-14 23:57:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:15,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-14 23:57:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:15,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:15,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:15,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:15,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401338266] [2021-04-14 23:57:15,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:15,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:15,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:15,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:15,905 INFO L87 Difference]: Start difference. First operand 2594 states and 7122 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:16,246 INFO L93 Difference]: Finished difference Result 4142 states and 10346 transitions. [2021-04-14 23:57:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-14 23:57:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:16,250 INFO L225 Difference]: With dead ends: 4142 [2021-04-14 23:57:16,250 INFO L226 Difference]: Without dead ends: 3872 [2021-04-14 23:57:16,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2021-04-14 23:57:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-04-14 23:57:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2609. [2021-04-14 23:57:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:16,282 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:16,282 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:16,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:16,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:16,284 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:16,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:16,484 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1239781240, now seen corresponding path program 66 times [2021-04-14 23:57:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882674174] [2021-04-14 23:57:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882674174] [2021-04-14 23:57:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576130362] [2021-04-14 23:57:16,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:16,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-14 23:57:16,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:16,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:16,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:16,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:16,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034766563] [2021-04-14 23:57:16,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:16,851 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:17,225 INFO L93 Difference]: Finished difference Result 4027 states and 10116 transitions. [2021-04-14 23:57:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-14 23:57:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:17,229 INFO L225 Difference]: With dead ends: 4027 [2021-04-14 23:57:17,229 INFO L226 Difference]: Without dead ends: 3757 [2021-04-14 23:57:17,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=427, Invalid=1295, Unknown=0, NotChecked=0, Total=1722 [2021-04-14 23:57:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-04-14 23:57:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 2609. [2021-04-14 23:57:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:17,255 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:17,255 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:17,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:17,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:17,257 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:17,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:17,458 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:17,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1603577094, now seen corresponding path program 67 times [2021-04-14 23:57:17,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:17,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809627790] [2021-04-14 23:57:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:17,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809627790] [2021-04-14 23:57:17,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763169808] [2021-04-14 23:57:17,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:17,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:17,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:17,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36015044] [2021-04-14 23:57:17,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:17,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:17,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:17,851 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:18,249 INFO L93 Difference]: Finished difference Result 3927 states and 9916 transitions. [2021-04-14 23:57:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:57:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:18,254 INFO L225 Difference]: With dead ends: 3927 [2021-04-14 23:57:18,254 INFO L226 Difference]: Without dead ends: 3657 [2021-04-14 23:57:18,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:57:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2021-04-14 23:57:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 2609. [2021-04-14 23:57:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:18,279 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:18,279 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:18,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:18,281 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:18,281 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:18,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:18,499 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1806745348, now seen corresponding path program 68 times [2021-04-14 23:57:18,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:18,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570751655] [2021-04-14 23:57:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:18,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570751655] [2021-04-14 23:57:18,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900216537] [2021-04-14 23:57:18,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:18,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:18,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:18,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:18,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318991534] [2021-04-14 23:57:18,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:18,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:18,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:18,920 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:19,376 INFO L93 Difference]: Finished difference Result 3827 states and 9716 transitions. [2021-04-14 23:57:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:57:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:19,380 INFO L225 Difference]: With dead ends: 3827 [2021-04-14 23:57:19,380 INFO L226 Difference]: Without dead ends: 3557 [2021-04-14 23:57:19,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1577, Unknown=0, NotChecked=0, Total=2070 [2021-04-14 23:57:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-04-14 23:57:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2609. [2021-04-14 23:57:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:19,405 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:19,405 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:19,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:19,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:19,407 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:19,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-04-14 23:57:19,608 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1425564030, now seen corresponding path program 69 times [2021-04-14 23:57:19,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:19,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826145116] [2021-04-14 23:57:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:19,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826145116] [2021-04-14 23:57:19,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219297970] [2021-04-14 23:57:19,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:19,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-14 23:57:19,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-14 23:57:19,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:19,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:19,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:19,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081596194] [2021-04-14 23:57:19,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:19,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:19,980 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:20,437 INFO L93 Difference]: Finished difference Result 3727 states and 9516 transitions. [2021-04-14 23:57:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:57:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:20,442 INFO L225 Difference]: With dead ends: 3727 [2021-04-14 23:57:20,442 INFO L226 Difference]: Without dead ends: 3457 [2021-04-14 23:57:20,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=550, Invalid=1706, Unknown=0, NotChecked=0, Total=2256 [2021-04-14 23:57:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-04-14 23:57:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2609. [2021-04-14 23:57:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:20,469 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:20,469 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:20,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:20,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:20,472 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:20,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:20,673 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1305092992, now seen corresponding path program 70 times [2021-04-14 23:57:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112341013] [2021-04-14 23:57:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112341013] [2021-04-14 23:57:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633569584] [2021-04-14 23:57:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:20,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:20,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:21,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:21,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:21,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065937647] [2021-04-14 23:57:21,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:21,035 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:21,567 INFO L93 Difference]: Finished difference Result 3627 states and 9316 transitions. [2021-04-14 23:57:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:57:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:21,570 INFO L225 Difference]: With dead ends: 3627 [2021-04-14 23:57:21,570 INFO L226 Difference]: Without dead ends: 3357 [2021-04-14 23:57:21,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2021-04-14 23:57:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-04-14 23:57:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2609. [2021-04-14 23:57:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:21,594 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:21,595 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:21,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:21,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:21,597 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:21,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:21,797 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash 29437438, now seen corresponding path program 71 times [2021-04-14 23:57:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:21,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590017729] [2021-04-14 23:57:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:21,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590017729] [2021-04-14 23:57:21,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615112842] [2021-04-14 23:57:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:22,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-14 23:57:22,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:22,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:22,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:22,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978946266] [2021-04-14 23:57:22,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:22,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:22,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:22,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:22,134 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:22,696 INFO L93 Difference]: Finished difference Result 3527 states and 9116 transitions. [2021-04-14 23:57:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:57:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:22,700 INFO L225 Difference]: With dead ends: 3527 [2021-04-14 23:57:22,700 INFO L226 Difference]: Without dead ends: 3257 [2021-04-14 23:57:22,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=712, Invalid=1940, Unknown=0, NotChecked=0, Total=2652 [2021-04-14 23:57:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-04-14 23:57:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 2609. [2021-04-14 23:57:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7423312883435584) internal successors, (7152), 2608 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7152 transitions. [2021-04-14 23:57:22,725 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7152 transitions. Word has length 104 [2021-04-14 23:57:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:22,725 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7152 transitions. [2021-04-14 23:57:22,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7152 transitions. [2021-04-14 23:57:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:22,728 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:22,728 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:22,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:22,945 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1977715740, now seen corresponding path program 72 times [2021-04-14 23:57:22,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:22,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232982128] [2021-04-14 23:57:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:23,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232982128] [2021-04-14 23:57:23,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362324186] [2021-04-14 23:57:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:23,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-14 23:57:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:23,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:23,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-14 23:57:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703341189] [2021-04-14 23:57:23,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-14 23:57:23,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-14 23:57:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-04-14 23:57:23,290 INFO L87 Difference]: Start difference. First operand 2609 states and 7152 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:23,911 INFO L93 Difference]: Finished difference Result 4225 states and 11108 transitions. [2021-04-14 23:57:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-14 23:57:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:23,916 INFO L225 Difference]: With dead ends: 4225 [2021-04-14 23:57:23,916 INFO L226 Difference]: Without dead ends: 3955 [2021-04-14 23:57:23,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2021-04-14 23:57:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-04-14 23:57:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 2734. [2021-04-14 23:57:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.7618002195389684) internal successors, (7548), 2733 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 7548 transitions. [2021-04-14 23:57:23,945 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 7548 transitions. Word has length 104 [2021-04-14 23:57:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:23,946 INFO L480 AbstractCegarLoop]: Abstraction has 2734 states and 7548 transitions. [2021-04-14 23:57:23,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 7548 transitions. [2021-04-14 23:57:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-04-14 23:57:23,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:23,948 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:24,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-14 23:57:24,148 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:24,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1657678816, now seen corresponding path program 73 times [2021-04-14 23:57:24,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:24,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041619702] [2021-04-14 23:57:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:24,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041619702] [2021-04-14 23:57:24,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529008312] [2021-04-14 23:57:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:57:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:24,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:24,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-04-14 23:57:24,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897292183] [2021-04-14 23:57:24,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:24,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:24,493 INFO L87 Difference]: Start difference. First operand 2734 states and 7548 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:25,296 INFO L93 Difference]: Finished difference Result 3959 states and 10366 transitions. [2021-04-14 23:57:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-14 23:57:25,296 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-04-14 23:57:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:25,300 INFO L225 Difference]: With dead ends: 3959 [2021-04-14 23:57:25,300 INFO L226 Difference]: Without dead ends: 3432 [2021-04-14 23:57:25,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 765.8ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-04-14 23:57:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-04-14 23:57:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 1984. [2021-04-14 23:57:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.668683812405446) internal successors, (5292), 1983 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 5292 transitions. [2021-04-14 23:57:25,323 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 5292 transitions. Word has length 104 [2021-04-14 23:57:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:25,324 INFO L480 AbstractCegarLoop]: Abstraction has 1984 states and 5292 transitions. [2021-04-14 23:57:25,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 5292 transitions. [2021-04-14 23:57:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:25,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:25,326 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:25,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:25,528 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash 842618851, now seen corresponding path program 74 times [2021-04-14 23:57:25,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:25,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852635268] [2021-04-14 23:57:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:25,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852635268] [2021-04-14 23:57:25,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549142849] [2021-04-14 23:57:25,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:25,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:25,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:25,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:25,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:25,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515595881] [2021-04-14 23:57:25,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:25,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:25,966 INFO L87 Difference]: Start difference. First operand 1984 states and 5292 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:26,366 INFO L93 Difference]: Finished difference Result 3177 states and 7856 transitions. [2021-04-14 23:57:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-14 23:57:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:26,369 INFO L225 Difference]: With dead ends: 3177 [2021-04-14 23:57:26,370 INFO L226 Difference]: Without dead ends: 2907 [2021-04-14 23:57:26,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:57:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2021-04-14 23:57:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2034. [2021-04-14 23:57:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.67683226758485) internal successors, (5442), 2033 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5442 transitions. [2021-04-14 23:57:26,390 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5442 transitions. Word has length 109 [2021-04-14 23:57:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:26,390 INFO L480 AbstractCegarLoop]: Abstraction has 2034 states and 5442 transitions. [2021-04-14 23:57:26,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5442 transitions. [2021-04-14 23:57:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:26,392 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:26,392 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:26,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:26,593 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2012051743, now seen corresponding path program 75 times [2021-04-14 23:57:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:26,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650864511] [2021-04-14 23:57:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:26,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650864511] [2021-04-14 23:57:26,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818160301] [2021-04-14 23:57:26,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:26,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-14 23:57:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-14 23:57:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:27,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:27,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160250381] [2021-04-14 23:57:27,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:27,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:27,044 INFO L87 Difference]: Start difference. First operand 2034 states and 5442 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:27,447 INFO L93 Difference]: Finished difference Result 3602 states and 8806 transitions. [2021-04-14 23:57:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:57:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:27,451 INFO L225 Difference]: With dead ends: 3602 [2021-04-14 23:57:27,451 INFO L226 Difference]: Without dead ends: 3332 [2021-04-14 23:57:27,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-04-14 23:57:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-04-14 23:57:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2134. [2021-04-14 23:57:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2133 states have (on average 2.691983122362869) internal successors, (5742), 2133 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 5742 transitions. [2021-04-14 23:57:27,473 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 5742 transitions. Word has length 109 [2021-04-14 23:57:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:27,473 INFO L480 AbstractCegarLoop]: Abstraction has 2134 states and 5742 transitions. [2021-04-14 23:57:27,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 5742 transitions. [2021-04-14 23:57:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:27,474 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:27,474 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:27,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:27,675 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash 831306591, now seen corresponding path program 76 times [2021-04-14 23:57:27,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:27,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856430430] [2021-04-14 23:57:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:27,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856430430] [2021-04-14 23:57:27,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4590904] [2021-04-14 23:57:27,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:27,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:27,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:28,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:28,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:28,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149081168] [2021-04-14 23:57:28,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:28,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:28,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:28,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:28,083 INFO L87 Difference]: Start difference. First operand 2134 states and 5742 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:28,516 INFO L93 Difference]: Finished difference Result 3602 states and 8906 transitions. [2021-04-14 23:57:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:57:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:28,519 INFO L225 Difference]: With dead ends: 3602 [2021-04-14 23:57:28,519 INFO L226 Difference]: Without dead ends: 3332 [2021-04-14 23:57:28,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-04-14 23:57:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-04-14 23:57:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2234. [2021-04-14 23:57:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 2.7057769816390507) internal successors, (6042), 2233 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 6042 transitions. [2021-04-14 23:57:28,543 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 6042 transitions. Word has length 109 [2021-04-14 23:57:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:28,543 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 6042 transitions. [2021-04-14 23:57:28,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 6042 transitions. [2021-04-14 23:57:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:28,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:28,545 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:28,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:28,745 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1034474845, now seen corresponding path program 77 times [2021-04-14 23:57:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:28,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614112776] [2021-04-14 23:57:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:28,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614112776] [2021-04-14 23:57:28,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611258387] [2021-04-14 23:57:28,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:28,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-14 23:57:28,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:28,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:29,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:29,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437251762] [2021-04-14 23:57:29,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:29,145 INFO L87 Difference]: Start difference. First operand 2234 states and 6042 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:29,612 INFO L93 Difference]: Finished difference Result 3602 states and 9006 transitions. [2021-04-14 23:57:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:57:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:29,616 INFO L225 Difference]: With dead ends: 3602 [2021-04-14 23:57:29,616 INFO L226 Difference]: Without dead ends: 3332 [2021-04-14 23:57:29,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-04-14 23:57:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-04-14 23:57:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2334. [2021-04-14 23:57:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 2.718388341191599) internal successors, (6342), 2333 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 6342 transitions. [2021-04-14 23:57:29,666 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 6342 transitions. Word has length 109 [2021-04-14 23:57:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:29,667 INFO L480 AbstractCegarLoop]: Abstraction has 2334 states and 6342 transitions. [2021-04-14 23:57:29,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 6342 transitions. [2021-04-14 23:57:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:29,668 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:29,669 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:29,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:29,869 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:29,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2097132763, now seen corresponding path program 78 times [2021-04-14 23:57:29,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:29,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155262910] [2021-04-14 23:57:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155262910] [2021-04-14 23:57:30,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775272043] [2021-04-14 23:57:30,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:30,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-14 23:57:30,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:30,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:30,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:30,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:30,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104662232] [2021-04-14 23:57:30,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:30,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:30,239 INFO L87 Difference]: Start difference. First operand 2334 states and 6342 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:30,750 INFO L93 Difference]: Finished difference Result 3602 states and 9106 transitions. [2021-04-14 23:57:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:57:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:30,754 INFO L225 Difference]: With dead ends: 3602 [2021-04-14 23:57:30,754 INFO L226 Difference]: Without dead ends: 3332 [2021-04-14 23:57:30,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-04-14 23:57:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-04-14 23:57:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2434. [2021-04-14 23:57:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 2.7299630086313194) internal successors, (6642), 2433 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 6642 transitions. [2021-04-14 23:57:30,778 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 6642 transitions. Word has length 109 [2021-04-14 23:57:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:30,778 INFO L480 AbstractCegarLoop]: Abstraction has 2434 states and 6642 transitions. [2021-04-14 23:57:30,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 6642 transitions. [2021-04-14 23:57:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:30,780 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:30,780 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:30,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:30,982 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash 532822489, now seen corresponding path program 79 times [2021-04-14 23:57:30,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:30,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946039897] [2021-04-14 23:57:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:31,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946039897] [2021-04-14 23:57:31,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633073416] [2021-04-14 23:57:31,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:31,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:31,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:31,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:31,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503601840] [2021-04-14 23:57:31,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:31,338 INFO L87 Difference]: Start difference. First operand 2434 states and 6642 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:31,893 INFO L93 Difference]: Finished difference Result 3602 states and 9206 transitions. [2021-04-14 23:57:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-14 23:57:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:31,897 INFO L225 Difference]: With dead ends: 3602 [2021-04-14 23:57:31,897 INFO L226 Difference]: Without dead ends: 3332 [2021-04-14 23:57:31,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-04-14 23:57:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-04-14 23:57:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2534. [2021-04-14 23:57:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 2.7406237662850375) internal successors, (6942), 2533 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 6942 transitions. [2021-04-14 23:57:31,922 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 6942 transitions. Word has length 109 [2021-04-14 23:57:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:31,922 INFO L480 AbstractCegarLoop]: Abstraction has 2534 states and 6942 transitions. [2021-04-14 23:57:31,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 6942 transitions. [2021-04-14 23:57:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:31,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:31,924 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:32,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:32,125 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash -742833065, now seen corresponding path program 80 times [2021-04-14 23:57:32,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:32,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202189954] [2021-04-14 23:57:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:32,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202189954] [2021-04-14 23:57:32,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370457026] [2021-04-14 23:57:32,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:32,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:32,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:32,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:32,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:32,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603973428] [2021-04-14 23:57:32,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:32,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:32,475 INFO L87 Difference]: Start difference. First operand 2534 states and 6942 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:33,056 INFO L93 Difference]: Finished difference Result 3632 states and 9381 transitions. [2021-04-14 23:57:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-14 23:57:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:33,060 INFO L225 Difference]: With dead ends: 3632 [2021-04-14 23:57:33,060 INFO L226 Difference]: Without dead ends: 3362 [2021-04-14 23:57:33,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-04-14 23:57:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-04-14 23:57:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2634. [2021-04-14 23:57:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7542726927459174) internal successors, (7252), 2633 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7252 transitions. [2021-04-14 23:57:33,087 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7252 transitions. Word has length 109 [2021-04-14 23:57:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:33,087 INFO L480 AbstractCegarLoop]: Abstraction has 2634 states and 7252 transitions. [2021-04-14 23:57:33,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7252 transitions. [2021-04-14 23:57:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:33,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:33,089 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:33,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:33,297 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1205445237, now seen corresponding path program 81 times [2021-04-14 23:57:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:33,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167839795] [2021-04-14 23:57:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:33,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167839795] [2021-04-14 23:57:33,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066764810] [2021-04-14 23:57:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:33,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-14 23:57:33,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:33,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:33,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-14 23:57:33,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362194899] [2021-04-14 23:57:33,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-14 23:57:33,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-14 23:57:33,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-04-14 23:57:33,681 INFO L87 Difference]: Start difference. First operand 2634 states and 7252 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:34,401 INFO L93 Difference]: Finished difference Result 4641 states and 12262 transitions. [2021-04-14 23:57:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-14 23:57:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:34,407 INFO L225 Difference]: With dead ends: 4641 [2021-04-14 23:57:34,407 INFO L226 Difference]: Without dead ends: 4160 [2021-04-14 23:57:34,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=1012, Invalid=2528, Unknown=0, NotChecked=0, Total=3540 [2021-04-14 23:57:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-04-14 23:57:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 2809. [2021-04-14 23:57:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 2.777065527065527) internal successors, (7798), 2808 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 7798 transitions. [2021-04-14 23:57:34,442 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 7798 transitions. Word has length 109 [2021-04-14 23:57:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:34,442 INFO L480 AbstractCegarLoop]: Abstraction has 2809 states and 7798 transitions. [2021-04-14 23:57:34,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 7798 transitions. [2021-04-14 23:57:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-04-14 23:57:34,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:34,444 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:34,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:34,645 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1865017977, now seen corresponding path program 82 times [2021-04-14 23:57:34,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:34,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448228501] [2021-04-14 23:57:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448228501] [2021-04-14 23:57:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635615783] [2021-04-14 23:57:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:34,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-14 23:57:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:35,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:35,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-04-14 23:57:35,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357525080] [2021-04-14 23:57:35,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-14 23:57:35,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:35,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-14 23:57:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:57:35,081 INFO L87 Difference]: Start difference. First operand 2809 states and 7798 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:35,950 INFO L93 Difference]: Finished difference Result 4079 states and 10756 transitions. [2021-04-14 23:57:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-14 23:57:35,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-04-14 23:57:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:35,954 INFO L225 Difference]: With dead ends: 4079 [2021-04-14 23:57:35,954 INFO L226 Difference]: Without dead ends: 3552 [2021-04-14 23:57:35,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 850.9ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-04-14 23:57:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-04-14 23:57:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 1923. [2021-04-14 23:57:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.671175858480749) internal successors, (5134), 1922 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 5134 transitions. [2021-04-14 23:57:35,989 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 5134 transitions. Word has length 109 [2021-04-14 23:57:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:35,989 INFO L480 AbstractCegarLoop]: Abstraction has 1923 states and 5134 transitions. [2021-04-14 23:57:35,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 5134 transitions. [2021-04-14 23:57:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:35,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:35,991 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:36,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-04-14 23:57:36,192 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:36,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1578972149, now seen corresponding path program 83 times [2021-04-14 23:57:36,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:36,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485280402] [2021-04-14 23:57:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:36,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485280402] [2021-04-14 23:57:36,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924517621] [2021-04-14 23:57:36,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:36,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-14 23:57:36,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:36,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:36,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-04-14 23:57:36,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611820703] [2021-04-14 23:57:36,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-14 23:57:36,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-14 23:57:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:57:36,730 INFO L87 Difference]: Start difference. First operand 1923 states and 5134 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:37,166 INFO L93 Difference]: Finished difference Result 3013 states and 7634 transitions. [2021-04-14 23:57:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-14 23:57:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:37,170 INFO L225 Difference]: With dead ends: 3013 [2021-04-14 23:57:37,170 INFO L226 Difference]: Without dead ends: 2679 [2021-04-14 23:57:37,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-04-14 23:57:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-04-14 23:57:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2008. [2021-04-14 23:57:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.6427503736920777) internal successors, (5304), 2007 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5304 transitions. [2021-04-14 23:57:37,189 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5304 transitions. Word has length 114 [2021-04-14 23:57:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:37,189 INFO L480 AbstractCegarLoop]: Abstraction has 2008 states and 5304 transitions. [2021-04-14 23:57:37,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5304 transitions. [2021-04-14 23:57:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:37,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:37,191 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:37,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:37,391 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2124561383, now seen corresponding path program 84 times [2021-04-14 23:57:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:37,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122624054] [2021-04-14 23:57:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122624054] [2021-04-14 23:57:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589219491] [2021-04-14 23:57:37,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:37,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-14 23:57:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-14 23:57:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:37,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:37,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:37,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713885933] [2021-04-14 23:57:37,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:37,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:37,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:37,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:37,824 INFO L87 Difference]: Start difference. First operand 2008 states and 5304 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:38,194 INFO L93 Difference]: Finished difference Result 3792 states and 9086 transitions. [2021-04-14 23:57:38,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-14 23:57:38,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:38,198 INFO L225 Difference]: With dead ends: 3792 [2021-04-14 23:57:38,198 INFO L226 Difference]: Without dead ends: 3522 [2021-04-14 23:57:38,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-04-14 23:57:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2021-04-14 23:57:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 2109. [2021-04-14 23:57:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 2.652751423149905) internal successors, (5592), 2108 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 5592 transitions. [2021-04-14 23:57:38,218 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 5592 transitions. Word has length 114 [2021-04-14 23:57:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:38,218 INFO L480 AbstractCegarLoop]: Abstraction has 2109 states and 5592 transitions. [2021-04-14 23:57:38,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 5592 transitions. [2021-04-14 23:57:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:38,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:38,220 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:38,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-04-14 23:57:38,425 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1477642297, now seen corresponding path program 85 times [2021-04-14 23:57:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:38,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631122834] [2021-04-14 23:57:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631122834] [2021-04-14 23:57:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464353714] [2021-04-14 23:57:38,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:38,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:38,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349356033] [2021-04-14 23:57:38,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:38,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:38,856 INFO L87 Difference]: Start difference. First operand 2109 states and 5592 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:39,263 INFO L93 Difference]: Finished difference Result 3777 states and 9156 transitions. [2021-04-14 23:57:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-14 23:57:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:39,267 INFO L225 Difference]: With dead ends: 3777 [2021-04-14 23:57:39,267 INFO L226 Difference]: Without dead ends: 3507 [2021-04-14 23:57:39,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-04-14 23:57:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-04-14 23:57:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2209. [2021-04-14 23:57:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.6684782608695654) internal successors, (5892), 2208 states have internal predecessors, (5892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 5892 transitions. [2021-04-14 23:57:39,289 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 5892 transitions. Word has length 114 [2021-04-14 23:57:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:39,289 INFO L480 AbstractCegarLoop]: Abstraction has 2209 states and 5892 transitions. [2021-04-14 23:57:39,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 5892 transitions. [2021-04-14 23:57:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:39,291 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:39,291 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:39,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-14 23:57:39,492 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1377028297, now seen corresponding path program 86 times [2021-04-14 23:57:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:39,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943319443] [2021-04-14 23:57:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:39,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943319443] [2021-04-14 23:57:39,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196468165] [2021-04-14 23:57:39,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:39,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:39,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:39,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:39,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192660226] [2021-04-14 23:57:39,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:39,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:39,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:39,913 INFO L87 Difference]: Start difference. First operand 2209 states and 5892 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:40,383 INFO L93 Difference]: Finished difference Result 3777 states and 9256 transitions. [2021-04-14 23:57:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:57:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:40,387 INFO L225 Difference]: With dead ends: 3777 [2021-04-14 23:57:40,387 INFO L226 Difference]: Without dead ends: 3507 [2021-04-14 23:57:40,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-04-14 23:57:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-04-14 23:57:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2309. [2021-04-14 23:57:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 2.682842287694974) internal successors, (6192), 2308 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 6192 transitions. [2021-04-14 23:57:40,411 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 6192 transitions. Word has length 114 [2021-04-14 23:57:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:40,411 INFO L480 AbstractCegarLoop]: Abstraction has 2309 states and 6192 transitions. [2021-04-14 23:57:40,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 6192 transitions. [2021-04-14 23:57:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:40,413 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:40,413 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:40,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:40,614 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:40,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1466330037, now seen corresponding path program 87 times [2021-04-14 23:57:40,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:40,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284011187] [2021-04-14 23:57:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:40,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284011187] [2021-04-14 23:57:40,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330510319] [2021-04-14 23:57:40,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:40,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-14 23:57:40,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:40,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-14 23:57:40,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:41,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:41,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:41,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088844269] [2021-04-14 23:57:41,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:41,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:41,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:41,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:41,012 INFO L87 Difference]: Start difference. First operand 2309 states and 6192 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:41,488 INFO L93 Difference]: Finished difference Result 3777 states and 9356 transitions. [2021-04-14 23:57:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:57:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:41,493 INFO L225 Difference]: With dead ends: 3777 [2021-04-14 23:57:41,493 INFO L226 Difference]: Without dead ends: 3507 [2021-04-14 23:57:41,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-04-14 23:57:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-04-14 23:57:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2409. [2021-04-14 23:57:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.6960132890365447) internal successors, (6492), 2408 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6492 transitions. [2021-04-14 23:57:41,518 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6492 transitions. Word has length 114 [2021-04-14 23:57:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:41,518 INFO L480 AbstractCegarLoop]: Abstraction has 2409 states and 6492 transitions. [2021-04-14 23:57:41,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6492 transitions. [2021-04-14 23:57:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:41,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:41,520 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:41,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:41,721 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1669498291, now seen corresponding path program 88 times [2021-04-14 23:57:41,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:41,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378162806] [2021-04-14 23:57:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:41,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378162806] [2021-04-14 23:57:41,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199169500] [2021-04-14 23:57:41,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:41,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:41,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:41,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:42,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:42,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:42,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450530683] [2021-04-14 23:57:42,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:42,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:42,103 INFO L87 Difference]: Start difference. First operand 2409 states and 6492 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:42,643 INFO L93 Difference]: Finished difference Result 3777 states and 9456 transitions. [2021-04-14 23:57:42,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:57:42,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:42,646 INFO L225 Difference]: With dead ends: 3777 [2021-04-14 23:57:42,647 INFO L226 Difference]: Without dead ends: 3507 [2021-04-14 23:57:42,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-04-14 23:57:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-04-14 23:57:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2509. [2021-04-14 23:57:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 2.708133971291866) internal successors, (6792), 2508 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 6792 transitions. [2021-04-14 23:57:42,672 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 6792 transitions. Word has length 114 [2021-04-14 23:57:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:42,672 INFO L480 AbstractCegarLoop]: Abstraction has 2509 states and 6792 transitions. [2021-04-14 23:57:42,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 6792 transitions. [2021-04-14 23:57:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:42,674 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:42,674 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:42,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-14 23:57:42,875 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:42,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1562811087, now seen corresponding path program 89 times [2021-04-14 23:57:42,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:42,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457357956] [2021-04-14 23:57:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457357956] [2021-04-14 23:57:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588641238] [2021-04-14 23:57:43,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:43,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-14 23:57:43,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:43,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:43,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32413833] [2021-04-14 23:57:43,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:43,249 INFO L87 Difference]: Start difference. First operand 2509 states and 6792 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:43,835 INFO L93 Difference]: Finished difference Result 3777 states and 9556 transitions. [2021-04-14 23:57:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:57:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:43,839 INFO L225 Difference]: With dead ends: 3777 [2021-04-14 23:57:43,839 INFO L226 Difference]: Without dead ends: 3507 [2021-04-14 23:57:43,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-04-14 23:57:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-04-14 23:57:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2609. [2021-04-14 23:57:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.7193251533742333) internal successors, (7092), 2608 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7092 transitions. [2021-04-14 23:57:43,866 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7092 transitions. Word has length 114 [2021-04-14 23:57:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:43,866 INFO L480 AbstractCegarLoop]: Abstraction has 2609 states and 7092 transitions. [2021-04-14 23:57:43,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7092 transitions. [2021-04-14 23:57:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:43,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:43,868 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:44,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-04-14 23:57:44,070 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1167845935, now seen corresponding path program 90 times [2021-04-14 23:57:44,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:44,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467678791] [2021-04-14 23:57:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:44,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467678791] [2021-04-14 23:57:44,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500213784] [2021-04-14 23:57:44,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:44,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-14 23:57:44,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:44,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-14 23:57:44,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:44,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:44,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:44,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873240246] [2021-04-14 23:57:44,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:44,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:44,481 INFO L87 Difference]: Start difference. First operand 2609 states and 7092 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:45,069 INFO L93 Difference]: Finished difference Result 3777 states and 9656 transitions. [2021-04-14 23:57:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-14 23:57:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:45,073 INFO L225 Difference]: With dead ends: 3777 [2021-04-14 23:57:45,073 INFO L226 Difference]: Without dead ends: 3507 [2021-04-14 23:57:45,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-04-14 23:57:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-04-14 23:57:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2709. [2021-04-14 23:57:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.7296898079763663) internal successors, (7392), 2708 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7392 transitions. [2021-04-14 23:57:45,104 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7392 transitions. Word has length 114 [2021-04-14 23:57:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:45,104 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7392 transitions. [2021-04-14 23:57:45,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7392 transitions. [2021-04-14 23:57:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:45,106 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:45,106 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:45,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:45,308 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash -107809619, now seen corresponding path program 91 times [2021-04-14 23:57:45,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:45,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574149745] [2021-04-14 23:57:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:45,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574149745] [2021-04-14 23:57:45,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105339109] [2021-04-14 23:57:45,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:45,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:45,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:45,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883857841] [2021-04-14 23:57:45,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:45,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:45,720 INFO L87 Difference]: Start difference. First operand 2709 states and 7392 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:46,370 INFO L93 Difference]: Finished difference Result 3807 states and 9831 transitions. [2021-04-14 23:57:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-14 23:57:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:46,374 INFO L225 Difference]: With dead ends: 3807 [2021-04-14 23:57:46,374 INFO L226 Difference]: Without dead ends: 3537 [2021-04-14 23:57:46,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-04-14 23:57:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-04-14 23:57:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2809. [2021-04-14 23:57:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 2.742877492877493) internal successors, (7702), 2808 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 7702 transitions. [2021-04-14 23:57:46,402 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 7702 transitions. Word has length 114 [2021-04-14 23:57:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:46,402 INFO L480 AbstractCegarLoop]: Abstraction has 2809 states and 7702 transitions. [2021-04-14 23:57:46,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 7702 transitions. [2021-04-14 23:57:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:46,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:46,405 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:46,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-04-14 23:57:46,605 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1840468683, now seen corresponding path program 92 times [2021-04-14 23:57:46,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:46,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217034] [2021-04-14 23:57:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217034] [2021-04-14 23:57:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665431824] [2021-04-14 23:57:46,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:46,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-14 23:57:46,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:46,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:46,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-04-14 23:57:46,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666365505] [2021-04-14 23:57:46,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:57:46,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:57:46,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-04-14 23:57:46,990 INFO L87 Difference]: Start difference. First operand 2809 states and 7702 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:47,689 INFO L93 Difference]: Finished difference Result 4841 states and 12762 transitions. [2021-04-14 23:57:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-14 23:57:47,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:47,694 INFO L225 Difference]: With dead ends: 4841 [2021-04-14 23:57:47,694 INFO L226 Difference]: Without dead ends: 4360 [2021-04-14 23:57:47,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 651.9ms TimeCoverageRelationStatistics Valid=1029, Invalid=2631, Unknown=0, NotChecked=0, Total=3660 [2021-04-14 23:57:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2021-04-14 23:57:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 2984. [2021-04-14 23:57:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 2.7650016761649345) internal successors, (8248), 2983 states have internal predecessors, (8248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 8248 transitions. [2021-04-14 23:57:47,727 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 8248 transitions. Word has length 114 [2021-04-14 23:57:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:47,727 INFO L480 AbstractCegarLoop]: Abstraction has 2984 states and 8248 transitions. [2021-04-14 23:57:47,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 8248 transitions. [2021-04-14 23:57:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-04-14 23:57:47,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:47,729 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:47,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:47,930 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1794925873, now seen corresponding path program 93 times [2021-04-14 23:57:47,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:47,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350108295] [2021-04-14 23:57:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:48,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350108295] [2021-04-14 23:57:48,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028076167] [2021-04-14 23:57:48,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:48,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-14 23:57:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:48,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:48,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-04-14 23:57:48,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925974216] [2021-04-14 23:57:48,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-14 23:57:48,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-14 23:57:48,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-04-14 23:57:48,346 INFO L87 Difference]: Start difference. First operand 2984 states and 8248 transitions. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:49,119 INFO L93 Difference]: Finished difference Result 3923 states and 10366 transitions. [2021-04-14 23:57:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-14 23:57:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-04-14 23:57:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:49,123 INFO L225 Difference]: With dead ends: 3923 [2021-04-14 23:57:49,123 INFO L226 Difference]: Without dead ends: 3452 [2021-04-14 23:57:49,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 744.6ms TimeCoverageRelationStatistics Valid=963, Invalid=2819, Unknown=0, NotChecked=0, Total=3782 [2021-04-14 23:57:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2021-04-14 23:57:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2074. [2021-04-14 23:57:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.673420164013507) internal successors, (5542), 2073 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5542 transitions. [2021-04-14 23:57:49,145 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5542 transitions. Word has length 114 [2021-04-14 23:57:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:49,145 INFO L480 AbstractCegarLoop]: Abstraction has 2074 states and 5542 transitions. [2021-04-14 23:57:49,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5542 transitions. [2021-04-14 23:57:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:49,147 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:49,147 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:49,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:49,349 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:49,350 INFO L82 PathProgramCache]: Analyzing trace with hash 289978836, now seen corresponding path program 94 times [2021-04-14 23:57:49,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:49,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187916607] [2021-04-14 23:57:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:49,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187916607] [2021-04-14 23:57:49,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891697786] [2021-04-14 23:57:49,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:49,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:49,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:49,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:49,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:49,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:49,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350123999] [2021-04-14 23:57:49,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:49,800 INFO L87 Difference]: Start difference. First operand 2074 states and 5542 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:50,242 INFO L93 Difference]: Finished difference Result 3367 states and 8306 transitions. [2021-04-14 23:57:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-14 23:57:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:50,245 INFO L225 Difference]: With dead ends: 3367 [2021-04-14 23:57:50,245 INFO L226 Difference]: Without dead ends: 3097 [2021-04-14 23:57:50,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 519.1ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-04-14 23:57:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-04-14 23:57:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 2124. [2021-04-14 23:57:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.6811116344795103) internal successors, (5692), 2123 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5692 transitions. [2021-04-14 23:57:50,265 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5692 transitions. Word has length 119 [2021-04-14 23:57:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:50,265 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5692 transitions. [2021-04-14 23:57:50,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5692 transitions. [2021-04-14 23:57:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:50,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:50,267 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:50,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-14 23:57:50,468 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2129249106, now seen corresponding path program 95 times [2021-04-14 23:57:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:50,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701423667] [2021-04-14 23:57:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:50,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701423667] [2021-04-14 23:57:50,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485180588] [2021-04-14 23:57:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:50,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-14 23:57:50,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:50,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:50,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:50,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115477056] [2021-04-14 23:57:50,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:50,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:50,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:50,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:50,918 INFO L87 Difference]: Start difference. First operand 2124 states and 5692 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:51,377 INFO L93 Difference]: Finished difference Result 3842 states and 9356 transitions. [2021-04-14 23:57:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:57:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:51,381 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:51,381 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:51,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2021-04-14 23:57:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2224. [2021-04-14 23:57:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.6954565901934324) internal successors, (5992), 2223 states have internal predecessors, (5992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5992 transitions. [2021-04-14 23:57:51,404 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5992 transitions. Word has length 119 [2021-04-14 23:57:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:51,404 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 5992 transitions. [2021-04-14 23:57:51,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5992 transitions. [2021-04-14 23:57:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:51,406 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:51,406 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:51,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:51,606 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -725421488, now seen corresponding path program 96 times [2021-04-14 23:57:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:51,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198292390] [2021-04-14 23:57:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:51,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198292390] [2021-04-14 23:57:51,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989272639] [2021-04-14 23:57:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:51,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-14 23:57:51,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:52,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:52,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733490326] [2021-04-14 23:57:52,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:52,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:52,053 INFO L87 Difference]: Start difference. First operand 2224 states and 5992 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:52,543 INFO L93 Difference]: Finished difference Result 3842 states and 9456 transitions. [2021-04-14 23:57:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:57:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:52,547 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:52,547 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:52,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 552.1ms TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2021-04-14 23:57:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2324. [2021-04-14 23:57:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7085665088247954) internal successors, (6292), 2323 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6292 transitions. [2021-04-14 23:57:52,571 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6292 transitions. Word has length 119 [2021-04-14 23:57:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:52,571 INFO L480 AbstractCegarLoop]: Abstraction has 2324 states and 6292 transitions. [2021-04-14 23:57:52,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6292 transitions. [2021-04-14 23:57:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:52,573 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:52,573 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:52,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:52,773 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2117936846, now seen corresponding path program 97 times [2021-04-14 23:57:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:52,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721832374] [2021-04-14 23:57:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:52,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721832374] [2021-04-14 23:57:52,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786337653] [2021-04-14 23:57:52,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:53,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:53,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:53,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073246856] [2021-04-14 23:57:53,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:53,203 INFO L87 Difference]: Start difference. First operand 2324 states and 6292 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:53,733 INFO L93 Difference]: Finished difference Result 3842 states and 9556 transitions. [2021-04-14 23:57:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:57:53,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:53,738 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:53,738 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:53,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-04-14 23:57:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2424. [2021-04-14 23:57:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.720594304581098) internal successors, (6592), 2423 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6592 transitions. [2021-04-14 23:57:53,765 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6592 transitions. Word has length 119 [2021-04-14 23:57:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:53,765 INFO L480 AbstractCegarLoop]: Abstraction has 2424 states and 6592 transitions. [2021-04-14 23:57:53,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6592 transitions. [2021-04-14 23:57:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:53,767 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:53,767 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:53,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-14 23:57:53,968 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:53,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1973862196, now seen corresponding path program 98 times [2021-04-14 23:57:53,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:53,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589356377] [2021-04-14 23:57:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589356377] [2021-04-14 23:57:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843048735] [2021-04-14 23:57:54,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:54,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:57:54,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:54,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:54,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12325932] [2021-04-14 23:57:54,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:54,410 INFO L87 Difference]: Start difference. First operand 2424 states and 6592 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:54,998 INFO L93 Difference]: Finished difference Result 3842 states and 9656 transitions. [2021-04-14 23:57:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-14 23:57:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:55,003 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:55,003 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:55,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2021-04-14 23:57:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2524. [2021-04-14 23:57:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.7316686484344035) internal successors, (6892), 2523 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6892 transitions. [2021-04-14 23:57:55,030 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6892 transitions. Word has length 119 [2021-04-14 23:57:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:55,030 INFO L480 AbstractCegarLoop]: Abstraction has 2524 states and 6892 transitions. [2021-04-14 23:57:55,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6892 transitions. [2021-04-14 23:57:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:55,032 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:55,032 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:55,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-04-14 23:57:55,234 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:55,234 INFO L82 PathProgramCache]: Analyzing trace with hash -911204278, now seen corresponding path program 99 times [2021-04-14 23:57:55,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:55,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835345611] [2021-04-14 23:57:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:55,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835345611] [2021-04-14 23:57:55,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910086215] [2021-04-14 23:57:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:55,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-14 23:57:55,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-14 23:57:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:55,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:55,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:55,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089565732] [2021-04-14 23:57:55,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:55,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:55,661 INFO L87 Difference]: Start difference. First operand 2524 states and 6892 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:56,294 INFO L93 Difference]: Finished difference Result 3842 states and 9756 transitions. [2021-04-14 23:57:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-14 23:57:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:56,298 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:56,298 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:56,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-04-14 23:57:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2624. [2021-04-14 23:57:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.741898589401449) internal successors, (7192), 2623 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7192 transitions. [2021-04-14 23:57:56,324 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7192 transitions. Word has length 119 [2021-04-14 23:57:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:56,324 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 7192 transitions. [2021-04-14 23:57:56,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7192 transitions. [2021-04-14 23:57:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:56,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:56,326 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:56,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-14 23:57:56,529 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1819452744, now seen corresponding path program 100 times [2021-04-14 23:57:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:56,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280936041] [2021-04-14 23:57:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:56,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280936041] [2021-04-14 23:57:56,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136860187] [2021-04-14 23:57:56,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:56,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:57:56,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:56,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:56,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:56,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:56,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148439379] [2021-04-14 23:57:56,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:56,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:56,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:56,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:56,960 INFO L87 Difference]: Start difference. First operand 2624 states and 7192 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:57,621 INFO L93 Difference]: Finished difference Result 3842 states and 9856 transitions. [2021-04-14 23:57:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-14 23:57:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:57,625 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:57,625 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:57,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2021-04-14 23:57:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2724. [2021-04-14 23:57:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 2.7513771575468233) internal successors, (7492), 2723 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 7492 transitions. [2021-04-14 23:57:57,654 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 7492 transitions. Word has length 119 [2021-04-14 23:57:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:57,654 INFO L480 AbstractCegarLoop]: Abstraction has 2724 states and 7492 transitions. [2021-04-14 23:57:57,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 7492 transitions. [2021-04-14 23:57:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:57,656 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:57,656 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:57,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:57:57,857 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 543797190, now seen corresponding path program 101 times [2021-04-14 23:57:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:57,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798209881] [2021-04-14 23:57:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798209881] [2021-04-14 23:57:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979480250] [2021-04-14 23:57:58,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:58,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-14 23:57:58,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:57:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:58,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:58,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:58,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427685400] [2021-04-14 23:57:58,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:58,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:58,281 INFO L87 Difference]: Start difference. First operand 2724 states and 7492 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:57:58,993 INFO L93 Difference]: Finished difference Result 3842 states and 9956 transitions. [2021-04-14 23:57:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-14 23:57:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:57:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:57:58,997 INFO L225 Difference]: With dead ends: 3842 [2021-04-14 23:57:58,997 INFO L226 Difference]: Without dead ends: 3572 [2021-04-14 23:57:58,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2021-04-14 23:57:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-04-14 23:57:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2824. [2021-04-14 23:57:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 2.7601842012043925) internal successors, (7792), 2823 states have internal predecessors, (7792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 7792 transitions. [2021-04-14 23:57:59,027 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 7792 transitions. Word has length 119 [2021-04-14 23:57:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:57:59,027 INFO L480 AbstractCegarLoop]: Abstraction has 2824 states and 7792 transitions. [2021-04-14 23:57:59,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:57:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 7792 transitions. [2021-04-14 23:57:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:57:59,029 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:57:59,029 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:57:59,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-14 23:57:59,230 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:57:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:57:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1802891804, now seen corresponding path program 102 times [2021-04-14 23:57:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:57:59,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699397181] [2021-04-14 23:57:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:57:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:57:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699397181] [2021-04-14 23:57:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331788469] [2021-04-14 23:57:59,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:57:59,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-14 23:57:59,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:57:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:57:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:57:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:57:59,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:57:59,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-04-14 23:57:59,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039280162] [2021-04-14 23:57:59,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:57:59,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:57:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:57:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:57:59,685 INFO L87 Difference]: Start difference. First operand 2824 states and 7792 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:00,417 INFO L93 Difference]: Finished difference Result 4565 states and 12058 transitions. [2021-04-14 23:58:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-14 23:58:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:58:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:00,422 INFO L225 Difference]: With dead ends: 4565 [2021-04-14 23:58:00,422 INFO L226 Difference]: Without dead ends: 4295 [2021-04-14 23:58:00,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2021-04-14 23:58:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-04-14 23:58:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 2999. [2021-04-14 23:58:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.7845230153435625) internal successors, (8348), 2998 states have internal predecessors, (8348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 8348 transitions. [2021-04-14 23:58:00,454 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 8348 transitions. Word has length 119 [2021-04-14 23:58:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:00,454 INFO L480 AbstractCegarLoop]: Abstraction has 2999 states and 8348 transitions. [2021-04-14 23:58:00,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 8348 transitions. [2021-04-14 23:58:00,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-04-14 23:58:00,456 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:00,456 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:00,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-14 23:58:00,657 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1143319064, now seen corresponding path program 103 times [2021-04-14 23:58:00,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:00,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842628672] [2021-04-14 23:58:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842628672] [2021-04-14 23:58:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184931166] [2021-04-14 23:58:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-14 23:58:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:01,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:01,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-04-14 23:58:01,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845840767] [2021-04-14 23:58:01,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-14 23:58:01,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-14 23:58:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:58:01,095 INFO L87 Difference]: Start difference. First operand 2999 states and 8348 transitions. Second operand has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:02,061 INFO L93 Difference]: Finished difference Result 4319 states and 11406 transitions. [2021-04-14 23:58:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-14 23:58:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-04-14 23:58:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:02,066 INFO L225 Difference]: With dead ends: 4319 [2021-04-14 23:58:02,066 INFO L226 Difference]: Without dead ends: 3792 [2021-04-14 23:58:02,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 935.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=3644, Unknown=0, NotChecked=0, Total=4970 [2021-04-14 23:58:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-04-14 23:58:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3009. [2021-04-14 23:58:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.776595744680851) internal successors, (8352), 3008 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8352 transitions. [2021-04-14 23:58:02,095 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8352 transitions. Word has length 119 [2021-04-14 23:58:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:02,095 INFO L480 AbstractCegarLoop]: Abstraction has 3009 states and 8352 transitions. [2021-04-14 23:58:02,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8352 transitions. [2021-04-14 23:58:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:02,097 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:02,097 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:02,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-14 23:58:02,298 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1502798852, now seen corresponding path program 104 times [2021-04-14 23:58:02,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:02,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297661102] [2021-04-14 23:58:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297661102] [2021-04-14 23:58:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848263730] [2021-04-14 23:58:02,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:02,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:58:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-14 23:58:02,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:02,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:02,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-04-14 23:58:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021588690] [2021-04-14 23:58:02,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-14 23:58:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-14 23:58:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-04-14 23:58:02,816 INFO L87 Difference]: Start difference. First operand 3009 states and 8352 transitions. Second operand has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:03,282 INFO L93 Difference]: Finished difference Result 3829 states and 10120 transitions. [2021-04-14 23:58:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:58:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:03,287 INFO L225 Difference]: With dead ends: 3829 [2021-04-14 23:58:03,287 INFO L226 Difference]: Without dead ends: 3559 [2021-04-14 23:58:03,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2021-04-14 23:58:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-04-14 23:58:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 3094. [2021-04-14 23:58:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 3093 states have (on average 2.7552537989007435) internal successors, (8522), 3093 states have internal predecessors, (8522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 8522 transitions. [2021-04-14 23:58:03,316 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 8522 transitions. Word has length 124 [2021-04-14 23:58:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:03,316 INFO L480 AbstractCegarLoop]: Abstraction has 3094 states and 8522 transitions. [2021-04-14 23:58:03,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 8522 transitions. [2021-04-14 23:58:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:03,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:03,319 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:03,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:03,521 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:03,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1491871094, now seen corresponding path program 105 times [2021-04-14 23:58:03,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:03,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081414885] [2021-04-14 23:58:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:03,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081414885] [2021-04-14 23:58:03,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928019079] [2021-04-14 23:58:03,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:03,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-04-14 23:58:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-14 23:58:03,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:04,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:04,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:04,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245710266] [2021-04-14 23:58:04,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:04,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:04,011 INFO L87 Difference]: Start difference. First operand 3094 states and 8522 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:04,443 INFO L93 Difference]: Finished difference Result 4942 states and 12346 transitions. [2021-04-14 23:58:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-14 23:58:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:04,448 INFO L225 Difference]: With dead ends: 4942 [2021-04-14 23:58:04,448 INFO L226 Difference]: Without dead ends: 4672 [2021-04-14 23:58:04,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-04-14 23:58:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2021-04-14 23:58:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 3109. [2021-04-14 23:58:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:04,481 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:04,481 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:04,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:04,483 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:04,483 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:04,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:04,684 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1147504982, now seen corresponding path program 106 times [2021-04-14 23:58:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:04,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892571503] [2021-04-14 23:58:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:04,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892571503] [2021-04-14 23:58:04,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628631171] [2021-04-14 23:58:04,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:04,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:58:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:05,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:05,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316903268] [2021-04-14 23:58:05,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:05,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:05,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:05,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:05,146 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:05,607 INFO L93 Difference]: Finished difference Result 4827 states and 12116 transitions. [2021-04-14 23:58:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-14 23:58:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:05,613 INFO L225 Difference]: With dead ends: 4827 [2021-04-14 23:58:05,613 INFO L226 Difference]: Without dead ends: 4557 [2021-04-14 23:58:05,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-04-14 23:58:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-04-14 23:58:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 3109. [2021-04-14 23:58:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:05,646 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:05,647 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:05,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:05,649 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:05,649 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:05,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:05,850 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash 691765288, now seen corresponding path program 107 times [2021-04-14 23:58:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:05,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117786559] [2021-04-14 23:58:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:06,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117786559] [2021-04-14 23:58:06,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179036910] [2021-04-14 23:58:06,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:06,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-04-14 23:58:06,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654638688] [2021-04-14 23:58:06,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:06,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:06,334 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:06,834 INFO L93 Difference]: Finished difference Result 4727 states and 11916 transitions. [2021-04-14 23:58:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-14 23:58:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:06,841 INFO L225 Difference]: With dead ends: 4727 [2021-04-14 23:58:06,841 INFO L226 Difference]: Without dead ends: 4457 [2021-04-14 23:58:06,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-04-14 23:58:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2021-04-14 23:58:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 3109. [2021-04-14 23:58:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:06,887 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:06,887 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:06,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:06,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:06,890 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:07,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-14 23:58:07,090 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2132061990, now seen corresponding path program 108 times [2021-04-14 23:58:07,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:07,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230856041] [2021-04-14 23:58:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:07,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230856041] [2021-04-14 23:58:07,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60032271] [2021-04-14 23:58:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:07,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-04-14 23:58:07,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-14 23:58:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:07,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:07,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:07,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542322092] [2021-04-14 23:58:07,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:07,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:07,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:07,541 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:08,093 INFO L93 Difference]: Finished difference Result 4627 states and 11716 transitions. [2021-04-14 23:58:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-14 23:58:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:08,098 INFO L225 Difference]: With dead ends: 4627 [2021-04-14 23:58:08,098 INFO L226 Difference]: Without dead ends: 4357 [2021-04-14 23:58:08,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-04-14 23:58:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2021-04-14 23:58:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 3109. [2021-04-14 23:58:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:08,146 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:08,146 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:08,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:08,148 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:08,148 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:08,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-14 23:58:08,348 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 680453028, now seen corresponding path program 109 times [2021-04-14 23:58:08,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:08,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223267676] [2021-04-14 23:58:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:08,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223267676] [2021-04-14 23:58:08,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208395726] [2021-04-14 23:58:08,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:08,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:08,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:08,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:08,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910001550] [2021-04-14 23:58:08,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:08,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:08,804 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:09,399 INFO L93 Difference]: Finished difference Result 4527 states and 11516 transitions. [2021-04-14 23:58:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-14 23:58:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:09,405 INFO L225 Difference]: With dead ends: 4527 [2021-04-14 23:58:09,405 INFO L226 Difference]: Without dead ends: 4257 [2021-04-14 23:58:09,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 614.1ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-04-14 23:58:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2021-04-14 23:58:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 3109. [2021-04-14 23:58:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:09,437 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:09,437 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:09,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:09,440 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:09,440 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:09,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-14 23:58:09,640 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash 883621282, now seen corresponding path program 110 times [2021-04-14 23:58:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:09,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599555153] [2021-04-14 23:58:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:09,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599555153] [2021-04-14 23:58:09,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622064860] [2021-04-14 23:58:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:09,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:58:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:09,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:10,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:10,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:10,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182236107] [2021-04-14 23:58:10,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:10,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:10,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:10,096 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:10,749 INFO L93 Difference]: Finished difference Result 4427 states and 11316 transitions. [2021-04-14 23:58:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-14 23:58:10,749 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:10,754 INFO L225 Difference]: With dead ends: 4427 [2021-04-14 23:58:10,754 INFO L226 Difference]: Without dead ends: 4157 [2021-04-14 23:58:10,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-04-14 23:58:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2021-04-14 23:58:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 3109. [2021-04-14 23:58:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:10,785 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:10,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:10,785 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:10,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:10,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:10,788 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:10,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-14 23:58:10,991 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:10,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1946279200, now seen corresponding path program 111 times [2021-04-14 23:58:10,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:10,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605792938] [2021-04-14 23:58:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:11,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605792938] [2021-04-14 23:58:11,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465732963] [2021-04-14 23:58:11,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:11,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-04-14 23:58:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-14 23:58:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:11,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:11,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:11,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469468130] [2021-04-14 23:58:11,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:11,434 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:12,107 INFO L93 Difference]: Finished difference Result 4327 states and 11116 transitions. [2021-04-14 23:58:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-14 23:58:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:12,111 INFO L225 Difference]: With dead ends: 4327 [2021-04-14 23:58:12,111 INFO L226 Difference]: Without dead ends: 4057 [2021-04-14 23:58:12,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-04-14 23:58:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-04-14 23:58:12,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3109. [2021-04-14 23:58:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:12,160 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:12,160 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:12,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:12,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:12,162 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:12,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-14 23:58:12,363 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash 381968926, now seen corresponding path program 112 times [2021-04-14 23:58:12,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:12,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064594477] [2021-04-14 23:58:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:12,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064594477] [2021-04-14 23:58:12,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402217876] [2021-04-14 23:58:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:12,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-14 23:58:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:12,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:12,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596613665] [2021-04-14 23:58:12,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:12,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:12,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:12,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:12,775 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:13,492 INFO L93 Difference]: Finished difference Result 4227 states and 10916 transitions. [2021-04-14 23:58:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-14 23:58:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:13,497 INFO L225 Difference]: With dead ends: 4227 [2021-04-14 23:58:13,497 INFO L226 Difference]: Without dead ends: 3957 [2021-04-14 23:58:13,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 692.1ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-04-14 23:58:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-04-14 23:58:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3109. [2021-04-14 23:58:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:13,527 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:13,528 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:13,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:13,530 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:13,530 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:13,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:13,732 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -893686628, now seen corresponding path program 113 times [2021-04-14 23:58:13,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:13,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503432814] [2021-04-14 23:58:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:13,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503432814] [2021-04-14 23:58:13,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125232024] [2021-04-14 23:58:13,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:14,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-04-14 23:58:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:14,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:14,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:14,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105947309] [2021-04-14 23:58:14,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:14,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:14,205 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:14,998 INFO L93 Difference]: Finished difference Result 4127 states and 10716 transitions. [2021-04-14 23:58:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-14 23:58:14,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:15,003 INFO L225 Difference]: With dead ends: 4127 [2021-04-14 23:58:15,003 INFO L226 Difference]: Without dead ends: 3857 [2021-04-14 23:58:15,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-04-14 23:58:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-04-14 23:58:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3109. [2021-04-14 23:58:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.7516087516087517) internal successors, (8552), 3108 states have internal predecessors, (8552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8552 transitions. [2021-04-14 23:58:15,033 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8552 transitions. Word has length 124 [2021-04-14 23:58:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:15,033 INFO L480 AbstractCegarLoop]: Abstraction has 3109 states and 8552 transitions. [2021-04-14 23:58:15,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8552 transitions. [2021-04-14 23:58:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:15,035 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:15,035 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:15,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-04-14 23:58:15,237 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1054591674, now seen corresponding path program 114 times [2021-04-14 23:58:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:15,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332000265] [2021-04-14 23:58:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332000265] [2021-04-14 23:58:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740384492] [2021-04-14 23:58:15,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:15,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-04-14 23:58:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-14 23:58:15,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:15,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:15,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-04-14 23:58:15,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092829949] [2021-04-14 23:58:15,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-14 23:58:15,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-14 23:58:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:15,651 INFO L87 Difference]: Start difference. First operand 3109 states and 8552 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:16,481 INFO L93 Difference]: Finished difference Result 4825 states and 12708 transitions. [2021-04-14 23:58:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-14 23:58:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:16,485 INFO L225 Difference]: With dead ends: 4825 [2021-04-14 23:58:16,486 INFO L226 Difference]: Without dead ends: 4555 [2021-04-14 23:58:16,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-04-14 23:58:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2021-04-14 23:58:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 3234. [2021-04-14 23:58:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 2.7677080111351686) internal successors, (8948), 3233 states have internal predecessors, (8948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 8948 transitions. [2021-04-14 23:58:16,518 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 8948 transitions. Word has length 124 [2021-04-14 23:58:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:16,518 INFO L480 AbstractCegarLoop]: Abstraction has 3234 states and 8948 transitions. [2021-04-14 23:58:16,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 8948 transitions. [2021-04-14 23:58:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-04-14 23:58:16,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:16,521 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:16,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:16,721 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1714164414, now seen corresponding path program 115 times [2021-04-14 23:58:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468088403] [2021-04-14 23:58:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:16,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468088403] [2021-04-14 23:58:16,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364044882] [2021-04-14 23:58:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:16,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-14 23:58:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:17,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-14 23:58:17,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-04-14 23:58:17,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064909566] [2021-04-14 23:58:17,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-14 23:58:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-14 23:58:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-04-14 23:58:17,175 INFO L87 Difference]: Start difference. First operand 3234 states and 8948 transitions. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:18,131 INFO L93 Difference]: Finished difference Result 4095 states and 10782 transitions. [2021-04-14 23:58:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-14 23:58:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-04-14 23:58:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:18,136 INFO L225 Difference]: With dead ends: 4095 [2021-04-14 23:58:18,136 INFO L226 Difference]: Without dead ends: 3762 [2021-04-14 23:58:18,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 940.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-04-14 23:58:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-04-14 23:58:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3134. [2021-04-14 23:58:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3133 states have (on average 2.761570379827641) internal successors, (8652), 3133 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 8652 transitions. [2021-04-14 23:58:18,175 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 8652 transitions. Word has length 124 [2021-04-14 23:58:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:18,175 INFO L480 AbstractCegarLoop]: Abstraction has 3134 states and 8652 transitions. [2021-04-14 23:58:18,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 8652 transitions. [2021-04-14 23:58:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-04-14 23:58:18,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:18,177 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:18,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:18,379 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash -162154918, now seen corresponding path program 116 times [2021-04-14 23:58:18,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:18,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109937551] [2021-04-14 23:58:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 406 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109937551] [2021-04-14 23:58:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277836806] [2021-04-14 23:58:18,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:18,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-14 23:58:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:58:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:18,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-14 23:58:18,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-04-14 23:58:18,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123504691] [2021-04-14 23:58:18,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:58:18,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:58:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:18,907 INFO L87 Difference]: Start difference. First operand 3134 states and 8652 transitions. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:19,290 INFO L93 Difference]: Finished difference Result 14636 states and 39582 transitions. [2021-04-14 23:58:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-14 23:58:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-04-14 23:58:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:19,292 INFO L225 Difference]: With dead ends: 14636 [2021-04-14 23:58:19,293 INFO L226 Difference]: Without dead ends: 1893 [2021-04-14 23:58:19,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-04-14 23:58:19,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-04-14 23:58:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1893. [2021-04-14 23:58:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.5607822410147993) internal successors, (4845), 1892 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 4845 transitions. [2021-04-14 23:58:19,309 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 4845 transitions. Word has length 129 [2021-04-14 23:58:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:19,309 INFO L480 AbstractCegarLoop]: Abstraction has 1893 states and 4845 transitions. [2021-04-14 23:58:19,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 4845 transitions. [2021-04-14 23:58:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-04-14 23:58:19,311 INFO L543 BasicCegarLoop]: Found error trace [2021-04-14 23:58:19,311 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-14 23:58:19,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-04-14 23:58:19,512 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-14 23:58:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-14 23:58:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2090803845, now seen corresponding path program 117 times [2021-04-14 23:58:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-14 23:58:19,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223880399] [2021-04-14 23:58:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-14 23:58:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-14 23:58:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 397 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:19,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223880399] [2021-04-14 23:58:19,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256359057] [2021-04-14 23:58:19,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-14 23:58:19,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-04-14 23:58:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-14 23:58:19,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-14 23:58:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-14 23:58:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-14 23:58:19,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-14 23:58:19,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-04-14 23:58:19,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604308534] [2021-04-14 23:58:19,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-14 23:58:19,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-14 23:58:19,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-14 23:58:19,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-04-14 23:58:19,951 INFO L87 Difference]: Start difference. First operand 1893 states and 4845 transitions. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-14 23:58:20,285 INFO L93 Difference]: Finished difference Result 7693 states and 19301 transitions. [2021-04-14 23:58:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-14 23:58:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-04-14 23:58:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-14 23:58:20,286 INFO L225 Difference]: With dead ends: 7693 [2021-04-14 23:58:20,286 INFO L226 Difference]: Without dead ends: 0 [2021-04-14 23:58:20,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-04-14 23:58:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-14 23:58:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-14 23:58:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-14 23:58:20,287 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2021-04-14 23:58:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-14 23:58:20,287 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-14 23:58:20,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-14 23:58:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-14 23:58:20,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-14 23:58:20,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-14 23:58:20,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 11:58:20 BasicIcfg [2021-04-14 23:58:20,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-14 23:58:20,493 INFO L168 Benchmark]: Toolchain (without parser) took 128503.65 ms. Allocated memory was 255.9 MB in the beginning and 859.8 MB in the end (delta: 604.0 MB). Free memory was 233.6 MB in the beginning and 362.2 MB in the end (delta: -128.6 MB). Peak memory consumption was 474.9 MB. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.89 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 233.6 MB in the beginning and 342.7 MB in the end (delta: -109.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.18 ms. Allocated memory is still 377.5 MB. Free memory was 342.7 MB in the beginning and 341.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L168 Benchmark]: Boogie Preprocessor took 33.09 ms. Allocated memory is still 377.5 MB. Free memory was 341.0 MB in the beginning and 339.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L168 Benchmark]: RCFGBuilder took 421.86 ms. Allocated memory is still 377.5 MB. Free memory was 339.8 MB in the beginning and 358.2 MB in the end (delta: -18.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L168 Benchmark]: TraceAbstraction took 127511.66 ms. Allocated memory was 377.5 MB in the beginning and 859.8 MB in the end (delta: 482.3 MB). Free memory was 357.4 MB in the beginning and 362.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 478.1 MB. Max. memory is 16.0 GB. [2021-04-14 23:58:20,494 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 478.89 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 233.6 MB in the beginning and 342.7 MB in the end (delta: -109.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 53.18 ms. Allocated memory is still 377.5 MB. Free memory was 342.7 MB in the beginning and 341.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.09 ms. Allocated memory is still 377.5 MB. Free memory was 341.0 MB in the beginning and 339.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 421.86 ms. Allocated memory is still 377.5 MB. Free memory was 339.8 MB in the beginning and 358.2 MB in the end (delta: -18.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 127511.66 ms. Allocated memory was 377.5 MB in the beginning and 859.8 MB in the end (delta: 482.3 MB). Free memory was 357.4 MB in the beginning and 362.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 478.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 127437.7ms, OverallIterations: 126, TraceHistogramMax: 11, EmptinessCheckTime: 258.6ms, AutomataDifference: 54252.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10774 SDtfs, 84655 SDslu, 91967 SDs, 0 SdLazy, 17560 SolverSat, 13256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10399.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16494 GetRequests, 11373 SyntacticMatches, 0 SemanticMatches, 5121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56162 ImplicationChecksByTransitivity, 52575.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3234occurred in iteration=123, InterpolantAutomatonStates: 3833, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3309.3ms AutomataMinimizationTime, 126 MinimizatonAttempts, 103965 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1308.0ms SsaConstructionTime, 3405.4ms SatisfiabilityAnalysisTime, 36161.1ms InterpolantComputationTime, 22794 NumberOfCodeBlocks, 22794 NumberOfCodeBlocksAsserted, 689 NumberOfCheckSat, 22549 ConstructedInterpolants, 0 QuantifiedInterpolants, 94403 SizeOfPredicates, 1829 NumberOfNonLiveVariables, 23722 ConjunctsInSsa, 2543 ConjunctsInUnsatCore, 245 InterpolantComputations, 9 PerfectInterpolantSequences, 1737/48842 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...