/usr/bin/java -Xmx8000000000 -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/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:14:03,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:14:03,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:14:03,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:14:03,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:14:03,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:14:03,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:14:03,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:14:03,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:14:03,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:14:03,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:14:03,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:14:03,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:14:03,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:14:03,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:14:03,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:14:03,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:14:03,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:14:03,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:14:03,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:14:03,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:14:03,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:14:03,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:14:03,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:14:03,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:14:03,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:14:03,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:14:03,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:14:03,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:14:03,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:14:03,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:14:03,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:14:03,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:14:03,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:14:03,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:14:03,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:14:03,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:14:03,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:14:03,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:14:03,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:14:03,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:14:03,415 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 [2021-07-09 16:14:03,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:14:03,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:14:03,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:14:03,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:14:03,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:14:03,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:14:03,455 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:14:03,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:14:03,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:14:03,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:14:03,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:14:03,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:14:03,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:14:03,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:14:03,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:14:03,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:14:03,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:14:03,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:14:03,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:14:03,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:14:03,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:14:03,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:14:03,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:14:03,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:14:03,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:14:03,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:14:03,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:14:03,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:14:03,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:14:03,475 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:14:03,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:14:03,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:14:03,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:14:03,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:14:03,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:14:03,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:14:03,819 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:14:03,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-07-09 16:14:03,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de682e588/7ed8ade97d43409db7454ec34ef236b5/FLAG80e8b3708 [2021-07-09 16:14:04,404 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:14:04,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-07-09 16:14:04,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de682e588/7ed8ade97d43409db7454ec34ef236b5/FLAG80e8b3708 [2021-07-09 16:14:04,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de682e588/7ed8ade97d43409db7454ec34ef236b5 [2021-07-09 16:14:04,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:14:04,706 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:14:04,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:14:04,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:14:04,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:14:04,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:14:04" (1/1) ... [2021-07-09 16:14:04,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553be247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:04, skipping insertion in model container [2021-07-09 16:14:04,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:14:04" (1/1) ... [2021-07-09 16:14:04,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:14:04,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:14:05,048 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-07-09 16:14:05,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:14:05,075 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:14:05,129 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-07-09 16:14:05,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:14:05,169 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:14:05,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05 WrapperNode [2021-07-09 16:14:05,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:14:05,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:14:05,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:14:05,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:14:05,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:14:05,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:14:05,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:14:05,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:14:05,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (1/1) ... [2021-07-09 16:14:05,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:14:05,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:14:05,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:14:05,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:14:05,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (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 [2021-07-09 16:14:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:14:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:14:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:14:05,351 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:14:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:14:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 16:14:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:14:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:14:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:14:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 16:14:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:14:05,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:14:05,354 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 16:14:05,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:14:05,786 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-09 16:14:05,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:14:05 BoogieIcfgContainer [2021-07-09 16:14:05,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:14:05,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:14:05,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:14:05,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:14:05,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:14:04" (1/3) ... [2021-07-09 16:14:05,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141a983e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:14:05, skipping insertion in model container [2021-07-09 16:14:05,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:14:05" (2/3) ... [2021-07-09 16:14:05,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141a983e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:14:05, skipping insertion in model container [2021-07-09 16:14:05,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:14:05" (3/3) ... [2021-07-09 16:14:05,796 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-07-09 16:14:05,802 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:14:05,802 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:14:05,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:14:05,803 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:14:05,837 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,838 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,838 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,838 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,841 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,841 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,841 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,841 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,843 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,843 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,844 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,844 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,844 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,845 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,845 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,847 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,847 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,847 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,847 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,849 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,849 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,849 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:14:05,863 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-09 16:14:05,889 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 16:14:05,913 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:14:05,913 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:14:05,913 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:14:05,913 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:14:05,913 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:14:05,914 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:14:05,914 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:14:05,914 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:14:05,927 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-07-09 16:14:06,002 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 16:14:06,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:06,021 INFO L508 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] [2021-07-09 16:14:06,021 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:06,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-07-09 16:14:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:06,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986169377] [2021-07-09 16:14:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:06,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:06,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986169377] [2021-07-09 16:14:06,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986169377] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:06,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:06,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:14:06,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783622715] [2021-07-09 16:14:06,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:14:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:14:06,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:14:06,443 INFO L87 Difference]: Start difference. First operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:06,683 INFO L93 Difference]: Finished difference Result 1756 states and 4724 transitions. [2021-07-09 16:14:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 16:14:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-07-09 16:14:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:06,714 INFO L225 Difference]: With dead ends: 1756 [2021-07-09 16:14:06,715 INFO L226 Difference]: Without dead ends: 1425 [2021-07-09 16:14:06,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:14:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-07-09 16:14:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-07-09 16:14:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-07-09 16:14:06,857 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-07-09 16:14:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:06,858 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-07-09 16:14:06,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-07-09 16:14:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 16:14:06,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:06,866 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:06,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:14:06,866 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-07-09 16:14:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:06,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212459291] [2021-07-09 16:14:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:07,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:07,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212459291] [2021-07-09 16:14:07,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212459291] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:07,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:07,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:14:07,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911853214] [2021-07-09 16:14:07,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:14:07,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:14:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:14:07,064 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:07,222 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-07-09 16:14:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:14:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-07-09 16:14:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:07,235 INFO L225 Difference]: With dead ends: 2025 [2021-07-09 16:14:07,235 INFO L226 Difference]: Without dead ends: 1758 [2021-07-09 16:14:07,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:14:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-09 16:14:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-07-09 16:14:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-07-09 16:14:07,290 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-07-09 16:14:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:07,291 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-07-09 16:14:07,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-07-09 16:14:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 16:14:07,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:07,293 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:07,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:14:07,294 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-07-09 16:14:07,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:07,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590422681] [2021-07-09 16:14:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:07,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:07,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590422681] [2021-07-09 16:14:07,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590422681] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:07,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:07,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:14:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336808833] [2021-07-09 16:14:07,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:14:07,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:14:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:14:07,435 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:07,556 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-07-09 16:14:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:14:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-07-09 16:14:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:07,567 INFO L225 Difference]: With dead ends: 2062 [2021-07-09 16:14:07,567 INFO L226 Difference]: Without dead ends: 1758 [2021-07-09 16:14:07,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:14:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-09 16:14:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-07-09 16:14:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-07-09 16:14:07,616 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-07-09 16:14:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:07,617 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-07-09 16:14:07,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-07-09 16:14:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 16:14:07,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:07,619 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:07,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:14:07,619 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:07,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-07-09 16:14:07,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:07,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978359065] [2021-07-09 16:14:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:07,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978359065] [2021-07-09 16:14:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978359065] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:07,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:07,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:14:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535226954] [2021-07-09 16:14:07,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:14:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:07,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:14:07,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:14:07,764 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:07,900 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-07-09 16:14:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:14:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-07-09 16:14:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:07,913 INFO L225 Difference]: With dead ends: 2318 [2021-07-09 16:14:07,914 INFO L226 Difference]: Without dead ends: 1987 [2021-07-09 16:14:07,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:14:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-07-09 16:14:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-07-09 16:14:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-07-09 16:14:07,964 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-07-09 16:14:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:07,966 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-07-09 16:14:07,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-07-09 16:14:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:07,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:07,969 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:07,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:14:07,970 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:07,970 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-07-09 16:14:07,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:07,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461932887] [2021-07-09 16:14:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:08,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:08,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461932887] [2021-07-09 16:14:08,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461932887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:08,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394149076] [2021-07-09 16:14:08,128 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 [2021-07-09 16:14:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:08,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:14:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:08,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394149076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:08,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:08,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 16:14:08,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238909254] [2021-07-09 16:14:08,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:14:08,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:14:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:14:08,530 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:08,766 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-07-09 16:14:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:14:08,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 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 42 [2021-07-09 16:14:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:08,781 INFO L225 Difference]: With dead ends: 2931 [2021-07-09 16:14:08,781 INFO L226 Difference]: Without dead ends: 2549 [2021-07-09 16:14:08,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:14:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-07-09 16:14:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-07-09 16:14:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-07-09 16:14:08,870 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-07-09 16:14:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:08,870 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-07-09 16:14:08,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-07-09 16:14:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:08,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:08,873 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:09,089 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:09,090 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-07-09 16:14:09,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:09,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980266551] [2021-07-09 16:14:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:09,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:09,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980266551] [2021-07-09 16:14:09,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980266551] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:09,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:09,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 16:14:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846327550] [2021-07-09 16:14:09,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:14:09,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:14:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:14:09,219 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-07-09 16:14:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:09,323 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-07-09 16:14:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:14:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 42 [2021-07-09 16:14:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:09,337 INFO L225 Difference]: With dead ends: 2566 [2021-07-09 16:14:09,338 INFO L226 Difference]: Without dead ends: 2414 [2021-07-09 16:14:09,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:14:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-07-09 16:14:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-07-09 16:14:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-07-09 16:14:09,403 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-07-09 16:14:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:09,404 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-07-09 16:14:09,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-07-09 16:14:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-07-09 16:14:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:09,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:09,408 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:09,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 16:14:09,408 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-07-09 16:14:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:09,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418124444] [2021-07-09 16:14:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:09,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418124444] [2021-07-09 16:14:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418124444] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:14:09,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:14:09,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 16:14:09,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329377838] [2021-07-09 16:14:09,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:14:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:14:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:14:09,531 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-07-09 16:14:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:09,697 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-07-09 16:14:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:14:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 42 [2021-07-09 16:14:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:09,712 INFO L225 Difference]: With dead ends: 2949 [2021-07-09 16:14:09,712 INFO L226 Difference]: Without dead ends: 2682 [2021-07-09 16:14:09,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-09 16:14:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1884. [2021-07-09 16:14:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.729155602761551) internal successors, (5139), 1883 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 5139 transitions. [2021-07-09 16:14:09,775 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 5139 transitions. Word has length 42 [2021-07-09 16:14:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:09,775 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 5139 transitions. [2021-07-09 16:14:09,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-07-09 16:14:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 5139 transitions. [2021-07-09 16:14:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:09,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:09,779 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:09,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 16:14:09,779 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:09,780 INFO L82 PathProgramCache]: Analyzing trace with hash -109178658, now seen corresponding path program 1 times [2021-07-09 16:14:09,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:09,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166275177] [2021-07-09 16:14:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:09,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166275177] [2021-07-09 16:14:09,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166275177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334644498] [2021-07-09 16:14:09,874 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 [2021-07-09 16:14:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:09,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:14:09,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:10,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334644498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:10,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:10,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 16:14:10,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068753017] [2021-07-09 16:14:10,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:14:10,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:14:10,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:14:10,103 INFO L87 Difference]: Start difference. First operand 1884 states and 5139 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:10,257 INFO L93 Difference]: Finished difference Result 3126 states and 8198 transitions. [2021-07-09 16:14:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:14:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 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 42 [2021-07-09 16:14:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:10,285 INFO L225 Difference]: With dead ends: 3126 [2021-07-09 16:14:10,286 INFO L226 Difference]: Without dead ends: 2646 [2021-07-09 16:14:10,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:14:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-07-09 16:14:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2032. [2021-07-09 16:14:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.6853766617429837) internal successors, (5454), 2031 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5454 transitions. [2021-07-09 16:14:10,369 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5454 transitions. Word has length 42 [2021-07-09 16:14:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:10,369 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5454 transitions. [2021-07-09 16:14:10,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5454 transitions. [2021-07-09 16:14:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:10,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:10,372 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:10,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:10,600 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash 239343274, now seen corresponding path program 2 times [2021-07-09 16:14:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:10,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745208873] [2021-07-09 16:14:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:10,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745208873] [2021-07-09 16:14:10,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745208873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918905909] [2021-07-09 16:14:10,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 16:14:10,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:10,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:14:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:10,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918905909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:10,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:10,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 16:14:10,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231428990] [2021-07-09 16:14:10,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:14:10,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:14:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:14:10,931 INFO L87 Difference]: Start difference. First operand 2032 states and 5454 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:11,103 INFO L93 Difference]: Finished difference Result 3246 states and 8438 transitions. [2021-07-09 16:14:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:14:11,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 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 42 [2021-07-09 16:14:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:11,113 INFO L225 Difference]: With dead ends: 3246 [2021-07-09 16:14:11,113 INFO L226 Difference]: Without dead ends: 2766 [2021-07-09 16:14:11,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:14:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-07-09 16:14:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2089. [2021-07-09 16:14:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.692528735632184) internal successors, (5622), 2088 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5622 transitions. [2021-07-09 16:14:11,193 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5622 transitions. Word has length 42 [2021-07-09 16:14:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:11,194 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 5622 transitions. [2021-07-09 16:14:11,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5622 transitions. [2021-07-09 16:14:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 16:14:11,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:11,198 INFO L508 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, 1, 1, 1] [2021-07-09 16:14:11,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 16:14:11,421 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1660775728, now seen corresponding path program 3 times [2021-07-09 16:14:11,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:11,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17462748] [2021-07-09 16:14:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:11,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17462748] [2021-07-09 16:14:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17462748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597301995] [2021-07-09 16:14:11,503 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 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 [2021-07-09 16:14:11,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:14:11,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:14:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597301995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:11,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:11,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 16:14:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238765363] [2021-07-09 16:14:11,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:14:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:14:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:14:11,795 INFO L87 Difference]: Start difference. First operand 2089 states and 5622 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:12,032 INFO L93 Difference]: Finished difference Result 3590 states and 9510 transitions. [2021-07-09 16:14:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:14:12,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 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 42 [2021-07-09 16:14:12,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:12,044 INFO L225 Difference]: With dead ends: 3590 [2021-07-09 16:14:12,044 INFO L226 Difference]: Without dead ends: 3056 [2021-07-09 16:14:12,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:14:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-07-09 16:14:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2263. [2021-07-09 16:14:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.7214854111405837) internal successors, (6156), 2262 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6156 transitions. [2021-07-09 16:14:12,114 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6156 transitions. Word has length 42 [2021-07-09 16:14:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:12,114 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6156 transitions. [2021-07-09 16:14:12,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6156 transitions. [2021-07-09 16:14:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:12,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:12,120 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:12,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:12,333 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-07-09 16:14:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428673848] [2021-07-09 16:14:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:12,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:12,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428673848] [2021-07-09 16:14:12,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428673848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:12,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128826975] [2021-07-09 16:14:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 16:14:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:12,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128826975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:12,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:12,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:12,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944796770] [2021-07-09 16:14:12,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:12,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:12,725 INFO L87 Difference]: Start difference. First operand 2263 states and 6156 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:12,932 INFO L93 Difference]: Finished difference Result 3186 states and 8435 transitions. [2021-07-09 16:14:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:14:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-09 16:14:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:12,940 INFO L225 Difference]: With dead ends: 3186 [2021-07-09 16:14:12,941 INFO L226 Difference]: Without dead ends: 3034 [2021-07-09 16:14:12,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:14:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-07-09 16:14:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2351. [2021-07-09 16:14:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.706808510638298) internal successors, (6361), 2350 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6361 transitions. [2021-07-09 16:14:12,999 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6361 transitions. Word has length 47 [2021-07-09 16:14:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:13,000 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6361 transitions. [2021-07-09 16:14:13,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6361 transitions. [2021-07-09 16:14:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:13,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:13,004 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:13,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 16:14:13,227 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-07-09 16:14:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:13,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056116708] [2021-07-09 16:14:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:13,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:13,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056116708] [2021-07-09 16:14:13,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056116708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:13,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348046714] [2021-07-09 16:14:13,305 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 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 [2021-07-09 16:14:13,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:13,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348046714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:13,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:13,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 16:14:13,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11806869] [2021-07-09 16:14:13,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:14:13,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:14:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:14:13,513 INFO L87 Difference]: Start difference. First operand 2351 states and 6361 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:13,903 INFO L93 Difference]: Finished difference Result 4460 states and 11788 transitions. [2021-07-09 16:14:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:14:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 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 47 [2021-07-09 16:14:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:13,915 INFO L225 Difference]: With dead ends: 4460 [2021-07-09 16:14:13,915 INFO L226 Difference]: Without dead ends: 3902 [2021-07-09 16:14:13,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:14:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-07-09 16:14:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 2378. [2021-07-09 16:14:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7328565418594866) internal successors, (6496), 2377 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6496 transitions. [2021-07-09 16:14:14,003 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6496 transitions. Word has length 47 [2021-07-09 16:14:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:14,003 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6496 transitions. [2021-07-09 16:14:14,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6496 transitions. [2021-07-09 16:14:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:14,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:14,007 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:14,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:14,231 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1283832340, now seen corresponding path program 1 times [2021-07-09 16:14:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:14,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299119133] [2021-07-09 16:14:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:14,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:14,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299119133] [2021-07-09 16:14:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299119133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:14,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671061120] [2021-07-09 16:14:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 16:14:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:14,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671061120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:14,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:14,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:14,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803052448] [2021-07-09 16:14:14,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:14,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:14,586 INFO L87 Difference]: Start difference. First operand 2378 states and 6496 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:14,763 INFO L93 Difference]: Finished difference Result 3748 states and 9803 transitions. [2021-07-09 16:14:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:14:14,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-09 16:14:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:14,772 INFO L225 Difference]: With dead ends: 3748 [2021-07-09 16:14:14,773 INFO L226 Difference]: Without dead ends: 3356 [2021-07-09 16:14:14,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:14:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-07-09 16:14:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2418. [2021-07-09 16:14:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7207281754240795) internal successors, (6576), 2417 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6576 transitions. [2021-07-09 16:14:14,850 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6576 transitions. Word has length 47 [2021-07-09 16:14:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:14,851 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6576 transitions. [2021-07-09 16:14:14,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6576 transitions. [2021-07-09 16:14:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:14,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:14,858 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:15,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:15,082 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash -796889656, now seen corresponding path program 2 times [2021-07-09 16:14:15,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072795614] [2021-07-09 16:14:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:15,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:15,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072795614] [2021-07-09 16:14:15,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072795614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:15,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777830834] [2021-07-09 16:14:15,163 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 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 [2021-07-09 16:14:15,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:15,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:15,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:15,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777830834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:15,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:15,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:15,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648440807] [2021-07-09 16:14:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:15,397 INFO L87 Difference]: Start difference. First operand 2418 states and 6576 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:15,614 INFO L93 Difference]: Finished difference Result 3948 states and 10203 transitions. [2021-07-09 16:14:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:14:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-09 16:14:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:15,624 INFO L225 Difference]: With dead ends: 3948 [2021-07-09 16:14:15,624 INFO L226 Difference]: Without dead ends: 3556 [2021-07-09 16:14:15,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:14:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-07-09 16:14:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2436. [2021-07-09 16:14:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 2.720328542094456) internal successors, (6624), 2435 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 6624 transitions. [2021-07-09 16:14:15,684 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 6624 transitions. Word has length 47 [2021-07-09 16:14:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:15,684 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 6624 transitions. [2021-07-09 16:14:15,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 6624 transitions. [2021-07-09 16:14:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:15,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:15,688 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:15,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:14:15,911 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 519106886, now seen corresponding path program 3 times [2021-07-09 16:14:15,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:15,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133569936] [2021-07-09 16:14:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:15,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133569936] [2021-07-09 16:14:15,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133569936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471318605] [2021-07-09 16:14:15,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 16:14:16,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:14:16,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:16,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:16,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471318605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:16,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:16,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092865256] [2021-07-09 16:14:16,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:16,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:16,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:16,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:16,286 INFO L87 Difference]: Start difference. First operand 2436 states and 6624 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:16,530 INFO L93 Difference]: Finished difference Result 4116 states and 10723 transitions. [2021-07-09 16:14:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:14:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-09 16:14:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:16,541 INFO L225 Difference]: With dead ends: 4116 [2021-07-09 16:14:16,542 INFO L226 Difference]: Without dead ends: 3724 [2021-07-09 16:14:16,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:14:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2021-07-09 16:14:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 2601. [2021-07-09 16:14:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2600 states have (on average 2.7380769230769233) internal successors, (7119), 2600 states have internal predecessors, (7119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 7119 transitions. [2021-07-09 16:14:16,606 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 7119 transitions. Word has length 47 [2021-07-09 16:14:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:16,606 INFO L482 AbstractCegarLoop]: Abstraction has 2601 states and 7119 transitions. [2021-07-09 16:14:16,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 7119 transitions. [2021-07-09 16:14:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 16:14:16,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:16,610 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:16,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:16,832 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 458639374, now seen corresponding path program 4 times [2021-07-09 16:14:16,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:16,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37319336] [2021-07-09 16:14:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:16,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:16,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37319336] [2021-07-09 16:14:16,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37319336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:16,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571365443] [2021-07-09 16:14:16,904 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 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 [2021-07-09 16:14:16,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:14:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:14:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:17,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571365443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:17,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:17,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 16:14:17,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144106540] [2021-07-09 16:14:17,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:14:17,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:17,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:14:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:14:17,112 INFO L87 Difference]: Start difference. First operand 2601 states and 7119 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:17,618 INFO L93 Difference]: Finished difference Result 5603 states and 14844 transitions. [2021-07-09 16:14:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:14:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-07-09 16:14:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:17,630 INFO L225 Difference]: With dead ends: 5603 [2021-07-09 16:14:17,631 INFO L226 Difference]: Without dead ends: 4778 [2021-07-09 16:14:17,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:14:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2021-07-09 16:14:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 2749. [2021-07-09 16:14:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2748 states have (on average 2.727802037845706) internal successors, (7496), 2748 states have internal predecessors, (7496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 7496 transitions. [2021-07-09 16:14:17,702 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 7496 transitions. Word has length 47 [2021-07-09 16:14:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:17,703 INFO L482 AbstractCegarLoop]: Abstraction has 2749 states and 7496 transitions. [2021-07-09 16:14:17,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 7496 transitions. [2021-07-09 16:14:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:17,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:17,707 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-09 16:14:17,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:17,921 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:17,921 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-07-09 16:14:17,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:17,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306426955] [2021-07-09 16:14:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:18,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306426955] [2021-07-09 16:14:18,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306426955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912730303] [2021-07-09 16:14:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:18,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:18,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:18,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912730303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:18,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:18,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 16:14:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446035455] [2021-07-09 16:14:18,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:14:18,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:18,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:14:18,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:14:18,271 INFO L87 Difference]: Start difference. First operand 2749 states and 7496 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:18,525 INFO L93 Difference]: Finished difference Result 4577 states and 12242 transitions. [2021-07-09 16:14:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:14:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 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 52 [2021-07-09 16:14:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:18,534 INFO L225 Difference]: With dead ends: 4577 [2021-07-09 16:14:18,535 INFO L226 Difference]: Without dead ends: 4195 [2021-07-09 16:14:18,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:14:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-07-09 16:14:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3079. [2021-07-09 16:14:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.748213125406108) internal successors, (8459), 3078 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8459 transitions. [2021-07-09 16:14:18,607 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8459 transitions. Word has length 52 [2021-07-09 16:14:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:18,608 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8459 transitions. [2021-07-09 16:14:18,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8459 transitions. [2021-07-09 16:14:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:18,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:18,617 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:18,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 16:14:18,841 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-07-09 16:14:18,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:18,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666465034] [2021-07-09 16:14:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:18,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666465034] [2021-07-09 16:14:18,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666465034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605306380] [2021-07-09 16:14:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:19,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 16:14:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:19,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:14:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:19,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605306380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:19,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:19,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:14:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416767833] [2021-07-09 16:14:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:14:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:14:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:14:19,127 INFO L87 Difference]: Start difference. First operand 3079 states and 8459 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:19,261 INFO L93 Difference]: Finished difference Result 4154 states and 11067 transitions. [2021-07-09 16:14:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:14:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 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 52 [2021-07-09 16:14:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:19,271 INFO L225 Difference]: With dead ends: 4154 [2021-07-09 16:14:19,271 INFO L226 Difference]: Without dead ends: 4002 [2021-07-09 16:14:19,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:14:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-07-09 16:14:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3176. [2021-07-09 16:14:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.733543307086614) internal successors, (8679), 3175 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8679 transitions. [2021-07-09 16:14:19,371 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8679 transitions. Word has length 52 [2021-07-09 16:14:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:19,371 INFO L482 AbstractCegarLoop]: Abstraction has 3176 states and 8679 transitions. [2021-07-09 16:14:19,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8679 transitions. [2021-07-09 16:14:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:19,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:19,377 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:19,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 16:14:19,601 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-07-09 16:14:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:19,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044252005] [2021-07-09 16:14:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:19,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:19,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044252005] [2021-07-09 16:14:19,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044252005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:19,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074203823] [2021-07-09 16:14:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:19,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:14:19,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:19,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:20,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074203823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:20,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:20,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:20,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011527968] [2021-07-09 16:14:20,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:20,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:20,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:20,030 INFO L87 Difference]: Start difference. First operand 3176 states and 8679 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:20,441 INFO L93 Difference]: Finished difference Result 5283 states and 14179 transitions. [2021-07-09 16:14:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:14:20,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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 52 [2021-07-09 16:14:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:20,454 INFO L225 Difference]: With dead ends: 5283 [2021-07-09 16:14:20,454 INFO L226 Difference]: Without dead ends: 4901 [2021-07-09 16:14:20,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:14:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-07-09 16:14:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3203. [2021-07-09 16:14:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.740474703310431) internal successors, (8775), 3202 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8775 transitions. [2021-07-09 16:14:20,542 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8775 transitions. Word has length 52 [2021-07-09 16:14:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:20,542 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8775 transitions. [2021-07-09 16:14:20,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8775 transitions. [2021-07-09 16:14:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:20,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:20,547 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:20,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 16:14:20,765 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-07-09 16:14:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:20,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943246482] [2021-07-09 16:14:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:20,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943246482] [2021-07-09 16:14:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943246482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267081856] [2021-07-09 16:14:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 16:14:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:21,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267081856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:21,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:21,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:21,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826140541] [2021-07-09 16:14:21,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:21,142 INFO L87 Difference]: Start difference. First operand 3203 states and 8775 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:21,401 INFO L93 Difference]: Finished difference Result 4495 states and 11783 transitions. [2021-07-09 16:14:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:14:21,402 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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 52 [2021-07-09 16:14:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:21,408 INFO L225 Difference]: With dead ends: 4495 [2021-07-09 16:14:21,408 INFO L226 Difference]: Without dead ends: 4343 [2021-07-09 16:14:21,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:14:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2021-07-09 16:14:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 3340. [2021-07-09 16:14:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 2.720275531596286) internal successors, (9083), 3339 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 9083 transitions. [2021-07-09 16:14:21,481 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 9083 transitions. Word has length 52 [2021-07-09 16:14:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:21,482 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 9083 transitions. [2021-07-09 16:14:21,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 9083 transitions. [2021-07-09 16:14:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:21,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:21,487 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:21,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:21,705 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-07-09 16:14:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:21,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212366162] [2021-07-09 16:14:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:21,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:21,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212366162] [2021-07-09 16:14:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212366162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:21,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301088803] [2021-07-09 16:14:21,787 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 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 [2021-07-09 16:14:21,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:21,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:22,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301088803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:22,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:22,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:22,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390456856] [2021-07-09 16:14:22,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:22,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:22,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:22,020 INFO L87 Difference]: Start difference. First operand 3340 states and 9083 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:22,433 INFO L93 Difference]: Finished difference Result 4909 states and 12794 transitions. [2021-07-09 16:14:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:14:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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 52 [2021-07-09 16:14:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:22,442 INFO L225 Difference]: With dead ends: 4909 [2021-07-09 16:14:22,442 INFO L226 Difference]: Without dead ends: 4757 [2021-07-09 16:14:22,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:14:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2021-07-09 16:14:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 3332. [2021-07-09 16:14:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.7469228459921946) internal successors, (9150), 3331 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 9150 transitions. [2021-07-09 16:14:22,518 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 9150 transitions. Word has length 52 [2021-07-09 16:14:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:22,518 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 9150 transitions. [2021-07-09 16:14:22,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 9150 transitions. [2021-07-09 16:14:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:22,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:22,524 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:22,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 16:14:22,737 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-07-09 16:14:22,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:22,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285802851] [2021-07-09 16:14:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:22,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:22,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285802851] [2021-07-09 16:14:22,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285802851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:22,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790891406] [2021-07-09 16:14:22,809 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 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 [2021-07-09 16:14:22,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:14:22,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:22,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:23,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790891406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:23,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:23,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524583093] [2021-07-09 16:14:23,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:23,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:23,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:23,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:23,034 INFO L87 Difference]: Start difference. First operand 3332 states and 9150 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:23,444 INFO L93 Difference]: Finished difference Result 4865 states and 13014 transitions. [2021-07-09 16:14:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:14:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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 52 [2021-07-09 16:14:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:23,457 INFO L225 Difference]: With dead ends: 4865 [2021-07-09 16:14:23,457 INFO L226 Difference]: Without dead ends: 4713 [2021-07-09 16:14:23,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:14:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-07-09 16:14:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 3515. [2021-07-09 16:14:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3514 states have (on average 2.7583949914627204) internal successors, (9693), 3514 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 9693 transitions. [2021-07-09 16:14:23,537 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 9693 transitions. Word has length 52 [2021-07-09 16:14:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:23,537 INFO L482 AbstractCegarLoop]: Abstraction has 3515 states and 9693 transitions. [2021-07-09 16:14:23,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 9693 transitions. [2021-07-09 16:14:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-09 16:14:23,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:23,543 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:23,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:23,767 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-07-09 16:14:23,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:23,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161408330] [2021-07-09 16:14:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:23,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161408330] [2021-07-09 16:14:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161408330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544910199] [2021-07-09 16:14:23,873 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 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 [2021-07-09 16:14:23,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:14:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:14:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:24,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544910199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:24,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:24,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 16:14:24,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010829517] [2021-07-09 16:14:24,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:14:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:14:24,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:14:24,098 INFO L87 Difference]: Start difference. First operand 3515 states and 9693 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:24,876 INFO L93 Difference]: Finished difference Result 6692 states and 18060 transitions. [2021-07-09 16:14:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 16:14:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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 52 [2021-07-09 16:14:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:24,886 INFO L225 Difference]: With dead ends: 6692 [2021-07-09 16:14:24,886 INFO L226 Difference]: Without dead ends: 6131 [2021-07-09 16:14:24,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:14:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2021-07-09 16:14:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 3407. [2021-07-09 16:14:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-07-09 16:14:24,968 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-07-09 16:14:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:24,968 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-07-09 16:14:24,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 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) [2021-07-09 16:14:24,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-07-09 16:14:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:24,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:24,973 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:25,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:14:25,177 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-07-09 16:14:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:25,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688536492] [2021-07-09 16:14:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:25,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:25,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688536492] [2021-07-09 16:14:25,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688536492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:25,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777562568] [2021-07-09 16:14:25,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 16:14:25,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 16:14:25,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777562568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 16:14:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391373430] [2021-07-09 16:14:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:14:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:14:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:14:25,543 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:25,724 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-07-09 16:14:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:14:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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 57 [2021-07-09 16:14:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:25,734 INFO L225 Difference]: With dead ends: 4692 [2021-07-09 16:14:25,735 INFO L226 Difference]: Without dead ends: 4540 [2021-07-09 16:14:25,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:14:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-07-09 16:14:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-07-09 16:14:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-07-09 16:14:25,807 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-07-09 16:14:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:25,807 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-07-09 16:14:25,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-07-09 16:14:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:25,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:25,814 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:26,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 16:14:26,021 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-07-09 16:14:26,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:26,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133456258] [2021-07-09 16:14:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:26,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133456258] [2021-07-09 16:14:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133456258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:26,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964098350] [2021-07-09 16:14:26,119 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 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 [2021-07-09 16:14:26,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 16:14:26,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:14:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:26,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964098350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:26,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:26,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 16:14:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557897965] [2021-07-09 16:14:26,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:14:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:14:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:14:26,348 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:26,628 INFO L93 Difference]: Finished difference Result 6127 states and 16569 transitions. [2021-07-09 16:14:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:14:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 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 57 [2021-07-09 16:14:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:26,639 INFO L225 Difference]: With dead ends: 6127 [2021-07-09 16:14:26,639 INFO L226 Difference]: Without dead ends: 5745 [2021-07-09 16:14:26,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:14:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-07-09 16:14:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 3442. [2021-07-09 16:14:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 2.7625690206335367) internal successors, (9506), 3441 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 9506 transitions. [2021-07-09 16:14:26,724 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 9506 transitions. Word has length 57 [2021-07-09 16:14:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:26,724 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 9506 transitions. [2021-07-09 16:14:26,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 9506 transitions. [2021-07-09 16:14:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:26,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:26,730 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:26,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 16:14:26,939 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash 948902018, now seen corresponding path program 5 times [2021-07-09 16:14:26,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:26,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186717603] [2021-07-09 16:14:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:27,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:27,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186717603] [2021-07-09 16:14:27,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186717603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:27,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718424558] [2021-07-09 16:14:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:27,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 16:14:27,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:27,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718424558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:27,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:27,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 16:14:27,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187981911] [2021-07-09 16:14:27,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:14:27,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:14:27,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:14:27,321 INFO L87 Difference]: Start difference. First operand 3442 states and 9506 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:27,643 INFO L93 Difference]: Finished difference Result 4903 states and 12991 transitions. [2021-07-09 16:14:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:14:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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 57 [2021-07-09 16:14:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:27,652 INFO L225 Difference]: With dead ends: 4903 [2021-07-09 16:14:27,652 INFO L226 Difference]: Without dead ends: 4751 [2021-07-09 16:14:27,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:14:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-07-09 16:14:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3495. [2021-07-09 16:14:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 2.757298225529479) internal successors, (9634), 3494 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 9634 transitions. [2021-07-09 16:14:27,718 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 9634 transitions. Word has length 57 [2021-07-09 16:14:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:27,718 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 9634 transitions. [2021-07-09 16:14:27,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 9634 transitions. [2021-07-09 16:14:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:27,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:27,724 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:27,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 16:14:27,950 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:27,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1297423950, now seen corresponding path program 6 times [2021-07-09 16:14:27,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:27,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501330647] [2021-07-09 16:14:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:28,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501330647] [2021-07-09 16:14:28,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501330647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362708195] [2021-07-09 16:14:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:28,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 16:14:28,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:28,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:28,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362708195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:28,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:28,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 16:14:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358370599] [2021-07-09 16:14:28,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:14:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:14:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:14:28,320 INFO L87 Difference]: Start difference. First operand 3495 states and 9634 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:28,637 INFO L93 Difference]: Finished difference Result 5102 states and 13767 transitions. [2021-07-09 16:14:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:14:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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 57 [2021-07-09 16:14:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:28,644 INFO L225 Difference]: With dead ends: 5102 [2021-07-09 16:14:28,645 INFO L226 Difference]: Without dead ends: 4950 [2021-07-09 16:14:28,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:14:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2021-07-09 16:14:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3615. [2021-07-09 16:14:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 2.7695074709463197) internal successors, (10009), 3614 states have internal predecessors, (10009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 10009 transitions. [2021-07-09 16:14:28,723 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 10009 transitions. Word has length 57 [2021-07-09 16:14:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:28,724 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 10009 transitions. [2021-07-09 16:14:28,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 10009 transitions. [2021-07-09 16:14:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:28,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:28,730 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:28,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 16:14:28,956 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash -602695052, now seen corresponding path program 7 times [2021-07-09 16:14:28,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:28,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410927095] [2021-07-09 16:14:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:29,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:29,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410927095] [2021-07-09 16:14:29,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410927095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:29,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132339246] [2021-07-09 16:14:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:29,666 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 14 [2021-07-09 16:14:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132339246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:29,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:29,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 16:14:29,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240185938] [2021-07-09 16:14:29,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:14:29,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:14:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:14:29,693 INFO L87 Difference]: Start difference. First operand 3615 states and 10009 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:30,381 INFO L93 Difference]: Finished difference Result 7316 states and 19720 transitions. [2021-07-09 16:14:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 16:14:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 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 57 [2021-07-09 16:14:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:30,393 INFO L225 Difference]: With dead ends: 7316 [2021-07-09 16:14:30,394 INFO L226 Difference]: Without dead ends: 6758 [2021-07-09 16:14:30,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:14:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6758 states. [2021-07-09 16:14:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6758 to 3478. [2021-07-09 16:14:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7822835777969512) internal successors, (9674), 3477 states have internal predecessors, (9674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9674 transitions. [2021-07-09 16:14:30,492 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9674 transitions. Word has length 57 [2021-07-09 16:14:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:30,493 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9674 transitions. [2021-07-09 16:14:30,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9674 transitions. [2021-07-09 16:14:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:30,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:30,499 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:30,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:30,713 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 8 times [2021-07-09 16:14:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167969006] [2021-07-09 16:14:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:30,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:30,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167969006] [2021-07-09 16:14:30,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167969006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:30,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692699404] [2021-07-09 16:14:30,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:30,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:14:30,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:30,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692699404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:31,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:31,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 16:14:31,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441894413] [2021-07-09 16:14:31,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:14:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:14:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:14:31,121 INFO L87 Difference]: Start difference. First operand 3478 states and 9674 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:31,494 INFO L93 Difference]: Finished difference Result 5207 states and 13699 transitions. [2021-07-09 16:14:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:14:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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 57 [2021-07-09 16:14:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:31,507 INFO L225 Difference]: With dead ends: 5207 [2021-07-09 16:14:31,507 INFO L226 Difference]: Without dead ends: 5055 [2021-07-09 16:14:31,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:14:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2021-07-09 16:14:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3543. [2021-07-09 16:14:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.7707509881422925) internal successors, (9814), 3542 states have internal predecessors, (9814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 9814 transitions. [2021-07-09 16:14:31,562 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 9814 transitions. Word has length 57 [2021-07-09 16:14:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:31,562 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 9814 transitions. [2021-07-09 16:14:31,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 9814 transitions. [2021-07-09 16:14:31,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:31,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:31,566 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:31,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 16:14:31,767 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 9 times [2021-07-09 16:14:31,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:31,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262534970] [2021-07-09 16:14:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:31,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:31,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262534970] [2021-07-09 16:14:31,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262534970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:31,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839486692] [2021-07-09 16:14:31,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:31,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 16:14:31,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:14:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839486692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:32,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:32,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 16:14:32,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347732583] [2021-07-09 16:14:32,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:14:32,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:14:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:14:32,123 INFO L87 Difference]: Start difference. First operand 3543 states and 9814 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 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) [2021-07-09 16:14:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:32,519 INFO L93 Difference]: Finished difference Result 5749 states and 15067 transitions. [2021-07-09 16:14:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:14:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 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 57 [2021-07-09 16:14:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:32,528 INFO L225 Difference]: With dead ends: 5749 [2021-07-09 16:14:32,528 INFO L226 Difference]: Without dead ends: 5509 [2021-07-09 16:14:32,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:14:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2021-07-09 16:14:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 3668. [2021-07-09 16:14:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3667 states have (on average 2.775838560130897) internal successors, (10179), 3667 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 10179 transitions. [2021-07-09 16:14:32,587 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 10179 transitions. Word has length 57 [2021-07-09 16:14:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:32,587 INFO L482 AbstractCegarLoop]: Abstraction has 3668 states and 10179 transitions. [2021-07-09 16:14:32,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 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) [2021-07-09 16:14:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 10179 transitions. [2021-07-09 16:14:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:32,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:32,591 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:32,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:32,792 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 10 times [2021-07-09 16:14:32,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:32,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025768704] [2021-07-09 16:14:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:32,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:32,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025768704] [2021-07-09 16:14:32,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025768704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:32,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997732986] [2021-07-09 16:14:32,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:14:32,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:14:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:14:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:33,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997732986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:33,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:14:33,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 16:14:33,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805120924] [2021-07-09 16:14:33,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:14:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:14:33,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:14:33,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:14:33,153 INFO L87 Difference]: Start difference. First operand 3668 states and 10179 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:14:33,640 INFO L93 Difference]: Finished difference Result 6147 states and 16560 transitions. [2021-07-09 16:14:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:14:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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 57 [2021-07-09 16:14:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:14:33,650 INFO L225 Difference]: With dead ends: 6147 [2021-07-09 16:14:33,650 INFO L226 Difference]: Without dead ends: 5995 [2021-07-09 16:14:33,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:14:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-07-09 16:14:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 3798. [2021-07-09 16:14:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 2.809849881485383) internal successors, (10669), 3797 states have internal predecessors, (10669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:14:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 10669 transitions. [2021-07-09 16:14:33,754 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 10669 transitions. Word has length 57 [2021-07-09 16:14:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:14:33,754 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 10669 transitions. [2021-07-09 16:14:33,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 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) [2021-07-09 16:14:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 10669 transitions. [2021-07-09 16:14:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 16:14:33,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:14:33,759 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:14:33,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 16:14:33,961 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:14:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:14:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 11 times [2021-07-09 16:14:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:14:33,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569125995] [2021-07-09 16:14:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:14:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:14:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:14:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:14:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569125995] [2021-07-09 16:14:34,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569125995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:14:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17138816] [2021-07-09 16:14:34,049 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 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 [2021-07-09 16:14:34,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 16:14:34,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:14:34,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:14:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates...