/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/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:25:05,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:25:05,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:25:05,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:25:05,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:25:05,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:25:05,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:25:05,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:25:05,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:25:05,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:25:05,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:25:05,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:25:05,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:25:05,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:25:05,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:25:05,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:25:05,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:25:05,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:25:05,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:25:05,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:25:05,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:25:05,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:25:05,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:25:05,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:25:05,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:25:05,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:25:05,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:25:05,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:25:05,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:25:05,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:25:05,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:25:05,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:25:05,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:25:05,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:25:05,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:25:05,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:25:05,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:25:05,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:25:05,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:25:05,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:25:05,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:25:05,478 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 16:25:05,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:25:05,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:25:05,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:25:05,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:25:05,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:25:05,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:25:05,521 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:25:05,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:25:05,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:25:05,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:25:05,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:25:05,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:25:05,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:25:05,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:25:05,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:25:05,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:25:05,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:25:05,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:25:05,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:25:05,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:25:05,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:25:05,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:25:05,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:25:05,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:25:05,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:25:05,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:25:05,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:25:05,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:25:05,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:25:05,786 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:25:05,787 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:25:05,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-07-09 16:25:05,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3b77b9d/32ef087fa6ea448eb4d47bbc8e7d1370/FLAGfd8072293 [2021-07-09 16:25:06,229 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:25:06,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-07-09 16:25:06,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3b77b9d/32ef087fa6ea448eb4d47bbc8e7d1370/FLAGfd8072293 [2021-07-09 16:25:06,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3b77b9d/32ef087fa6ea448eb4d47bbc8e7d1370 [2021-07-09 16:25:06,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:25:06,258 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:25:06,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:25:06,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:25:06,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:25:06,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8d6526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06, skipping insertion in model container [2021-07-09 16:25:06,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:25:06,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:25:06,588 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/triangular-longest-1.i[30962,30975] [2021-07-09 16:25:06,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:25:06,595 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:25:06,615 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/triangular-longest-1.i[30962,30975] [2021-07-09 16:25:06,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:25:06,637 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:25:06,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06 WrapperNode [2021-07-09 16:25:06,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:25:06,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:25:06,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:25:06,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:25:06,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:25:06,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:25:06,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:25:06,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:25:06,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (1/1) ... [2021-07-09 16:25:06,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:25:06,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:25:06,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:25:06,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:25:06,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (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 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:25:06,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:25:06,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:25:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:25:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 16:25:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:25:06,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:25:06,780 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 16:25:07,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:25:07,094 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-09 16:25:07,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:25:07 BoogieIcfgContainer [2021-07-09 16:25:07,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:25:07,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:25:07,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:25:07,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:25:07,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:25:06" (1/3) ... [2021-07-09 16:25:07,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c13ea5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:25:07, skipping insertion in model container [2021-07-09 16:25:07,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:06" (2/3) ... [2021-07-09 16:25:07,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c13ea5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:25:07, skipping insertion in model container [2021-07-09 16:25:07,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:25:07" (3/3) ... [2021-07-09 16:25:07,103 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-07-09 16:25:07,107 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:25:07,107 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:25:07,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:25:07,107 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:25:07,131 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,132 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,136 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,136 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,137 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,137 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,137 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,137 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,138 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,138 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,138 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,138 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,140 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,141 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,141 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,141 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,141 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,141 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,141 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,142 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,142 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:07,153 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-09 16:25:07,170 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 16:25:07,187 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:25:07,187 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:25:07,187 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:25:07,187 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:25:07,188 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:25:07,188 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:25:07,188 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:25:07,188 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:25:07,197 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-07-09 16:25:07,249 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 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 16:25:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 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 16:25:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 16:25:07,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:07,260 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 16:25:07,260 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:07,265 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-07-09 16:25:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:07,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140643315] [2021-07-09 16:25:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:07,546 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 16:25:07,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:07,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140643315] [2021-07-09 16:25:07,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140643315] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:07,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:07,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:25:07,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920801267] [2021-07-09 16:25:07,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:25:07,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:25:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:25:07,577 INFO L87 Difference]: Start difference. First operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 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 16:25:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:07,703 INFO L93 Difference]: Finished difference Result 1582 states and 4288 transitions. [2021-07-09 16:25:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 16:25:07,706 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 16:25:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:07,720 INFO L225 Difference]: With dead ends: 1582 [2021-07-09 16:25:07,720 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 16:25:07,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:25:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 16:25:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-07-09 16:25:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 16:25:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-07-09 16:25:07,788 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-07-09 16:25:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:07,789 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-07-09 16:25:07,789 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 16:25:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-07-09 16:25:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 16:25:07,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:07,791 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] [2021-07-09 16:25:07,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:25:07,792 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:07,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-07-09 16:25:07,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:07,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378879611] [2021-07-09 16:25:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:07,933 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 16:25:07,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378879611] [2021-07-09 16:25:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378879611] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:07,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:07,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:25:07,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090339730] [2021-07-09 16:25:07,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:25:07,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:25:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:25:07,935 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 16:25:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:08,070 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-07-09 16:25:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:25:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-07-09 16:25:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:08,076 INFO L225 Difference]: With dead ends: 1302 [2021-07-09 16:25:08,076 INFO L226 Difference]: Without dead ends: 920 [2021-07-09 16:25:08,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:25:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-09 16:25:08,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-07-09 16:25:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 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 16:25:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-07-09 16:25:08,109 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-07-09 16:25:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:08,109 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-07-09 16:25:08,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 16:25:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-07-09 16:25:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 16:25:08,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:08,112 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] [2021-07-09 16:25:08,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:25:08,112 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -262940086, now seen corresponding path program 1 times [2021-07-09 16:25:08,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:08,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243603642] [2021-07-09 16:25:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:08,196 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 16:25:08,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:08,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243603642] [2021-07-09 16:25:08,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243603642] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:08,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:08,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:25:08,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284477285] [2021-07-09 16:25:08,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:25:08,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:25:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:25:08,225 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 16:25:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:08,365 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-07-09 16:25:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:25:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-07-09 16:25:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:08,370 INFO L225 Difference]: With dead ends: 1304 [2021-07-09 16:25:08,370 INFO L226 Difference]: Without dead ends: 1044 [2021-07-09 16:25:08,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:25:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-09 16:25:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-07-09 16:25:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 16:25:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-07-09 16:25:08,393 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-07-09 16:25:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:08,394 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-07-09 16:25:08,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 16:25:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-07-09 16:25:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 16:25:08,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:08,396 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] [2021-07-09 16:25:08,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:25:08,397 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1449045748, now seen corresponding path program 2 times [2021-07-09 16:25:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:08,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742737360] [2021-07-09 16:25:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:08,498 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 16:25:08,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:08,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742737360] [2021-07-09 16:25:08,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742737360] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:08,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:08,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:25:08,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003635434] [2021-07-09 16:25:08,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:25:08,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:08,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:25:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:25:08,503 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 16:25:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:08,609 INFO L93 Difference]: Finished difference Result 1524 states and 4056 transitions. [2021-07-09 16:25:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:25:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-07-09 16:25:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:08,617 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 16:25:08,617 INFO L226 Difference]: Without dead ends: 1131 [2021-07-09 16:25:08,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:25:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-07-09 16:25:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1033. [2021-07-09 16:25:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 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 16:25:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-07-09 16:25:08,645 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-07-09 16:25:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:08,647 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-07-09 16:25:08,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 16:25:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-07-09 16:25:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 16:25:08,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:08,649 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] [2021-07-09 16:25:08,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:25:08,649 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1733061585, now seen corresponding path program 1 times [2021-07-09 16:25:08,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:08,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109570338] [2021-07-09 16:25:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:08,740 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 16:25:08,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:08,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109570338] [2021-07-09 16:25:08,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109570338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:08,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891723987] [2021-07-09 16:25:08,740 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 16:25:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:25:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:09,013 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 16:25:09,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891723987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:09,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:09,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:25:09,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942005285] [2021-07-09 16:25:09,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:25:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:25:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:25:09,015 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 16:25:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:09,249 INFO L93 Difference]: Finished difference Result 2071 states and 5539 transitions. [2021-07-09 16:25:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:25:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 45 [2021-07-09 16:25:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:09,255 INFO L225 Difference]: With dead ends: 2071 [2021-07-09 16:25:09,255 INFO L226 Difference]: Without dead ends: 1481 [2021-07-09 16:25:09,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:25:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-07-09 16:25:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1253. [2021-07-09 16:25:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 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 16:25:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-07-09 16:25:09,284 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-07-09 16:25:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:09,284 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-07-09 16:25:09,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 16:25:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-07-09 16:25:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 16:25:09,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:09,285 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] [2021-07-09 16:25:09,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:09,503 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -4578824, now seen corresponding path program 1 times [2021-07-09 16:25:09,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:09,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190122166] [2021-07-09 16:25:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:09,581 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 16:25:09,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190122166] [2021-07-09 16:25:09,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190122166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210336452] [2021-07-09 16:25:09,582 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 16:25:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:25:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:09,738 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 16:25:09,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210336452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:09,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:09,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:25:09,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555214599] [2021-07-09 16:25:09,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:25:09,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:25:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:25:09,742 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 16:25:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:09,891 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-07-09 16:25:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:25:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 45 [2021-07-09 16:25:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:09,899 INFO L225 Difference]: With dead ends: 2398 [2021-07-09 16:25:09,899 INFO L226 Difference]: Without dead ends: 1926 [2021-07-09 16:25:09,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:25:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-07-09 16:25:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-07-09 16:25:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 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 16:25:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-07-09 16:25:09,931 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-07-09 16:25:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:09,931 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-07-09 16:25:09,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 16:25:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-07-09 16:25:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 16:25:09,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:09,933 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] [2021-07-09 16:25:10,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:10,149 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1431609058, now seen corresponding path program 1 times [2021-07-09 16:25:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:10,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409475387] [2021-07-09 16:25:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:10,222 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 16:25:10,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:10,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409475387] [2021-07-09 16:25:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409475387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043012417] [2021-07-09 16:25:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:25:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:10,379 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 16:25:10,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043012417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:10,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:10,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:25:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825297543] [2021-07-09 16:25:10,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:25:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:25:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:25:10,382 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 16:25:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:10,700 INFO L93 Difference]: Finished difference Result 3181 states and 8585 transitions. [2021-07-09 16:25:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:25:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 55 [2021-07-09 16:25:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:10,709 INFO L225 Difference]: With dead ends: 3181 [2021-07-09 16:25:10,709 INFO L226 Difference]: Without dead ends: 2281 [2021-07-09 16:25:10,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:25:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-07-09 16:25:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1656. [2021-07-09 16:25:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 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 16:25:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-07-09 16:25:10,743 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-07-09 16:25:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:10,744 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-07-09 16:25:10,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 16:25:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-07-09 16:25:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 16:25:10,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:10,746 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] [2021-07-09 16:25:10,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:10,963 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:10,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1291036999, now seen corresponding path program 2 times [2021-07-09 16:25:10,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:10,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729701299] [2021-07-09 16:25:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:11,045 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 16:25:11,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:11,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729701299] [2021-07-09 16:25:11,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729701299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:11,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765032360] [2021-07-09 16:25:11,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:11,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:11,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:25:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:11,213 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 16:25:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765032360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:11,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:25:11,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885156847] [2021-07-09 16:25:11,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:25:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:25:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:25:11,215 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 16:25:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:11,431 INFO L93 Difference]: Finished difference Result 3238 states and 8770 transitions. [2021-07-09 16:25:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:25:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 55 [2021-07-09 16:25:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:11,440 INFO L225 Difference]: With dead ends: 3238 [2021-07-09 16:25:11,440 INFO L226 Difference]: Without dead ends: 2426 [2021-07-09 16:25:11,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:25:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-07-09 16:25:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1856. [2021-07-09 16:25:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 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 16:25:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-07-09 16:25:11,481 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-07-09 16:25:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:11,481 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-07-09 16:25:11,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 16:25:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-07-09 16:25:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 16:25:11,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:11,484 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:11,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:11,697 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash -869732173, now seen corresponding path program 3 times [2021-07-09 16:25:11,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:11,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429597508] [2021-07-09 16:25:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:11,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429597508] [2021-07-09 16:25:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429597508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:11,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407915443] [2021-07-09 16:25:11,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:11,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:25:11,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:25:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407915443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:11,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:11,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 16:25:11,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725402922] [2021-07-09 16:25:11,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:25:11,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:25:11,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:25:11,952 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:12,318 INFO L93 Difference]: Finished difference Result 3085 states and 8445 transitions. [2021-07-09 16:25:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:25:12,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 16:25:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:12,326 INFO L225 Difference]: With dead ends: 3085 [2021-07-09 16:25:12,327 INFO L226 Difference]: Without dead ends: 2271 [2021-07-09 16:25:12,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:25:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-07-09 16:25:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2086. [2021-07-09 16:25:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.7525179856115107) internal successors, (5739), 2085 states have internal predecessors, (5739), 0 states have call successors, (0), 0 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 16:25:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5739 transitions. [2021-07-09 16:25:12,364 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5739 transitions. Word has length 65 [2021-07-09 16:25:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:12,364 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5739 transitions. [2021-07-09 16:25:12,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5739 transitions. [2021-07-09 16:25:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 16:25:12,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:12,367 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:12,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 16:25:12,581 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1279026730, now seen corresponding path program 4 times [2021-07-09 16:25:12,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:12,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872323312] [2021-07-09 16:25:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:12,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:12,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872323312] [2021-07-09 16:25:12,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872323312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:12,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377240577] [2021-07-09 16:25:12,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:12,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:25:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377240577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:12,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:12,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:25:12,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652621149] [2021-07-09 16:25:12,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:25:12,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:12,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:25:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:25:12,852 INFO L87 Difference]: Start difference. First operand 2086 states and 5739 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 16:25:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:13,165 INFO L93 Difference]: Finished difference Result 3503 states and 9510 transitions. [2021-07-09 16:25:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:25:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 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 65 [2021-07-09 16:25:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:13,175 INFO L225 Difference]: With dead ends: 3503 [2021-07-09 16:25:13,175 INFO L226 Difference]: Without dead ends: 2691 [2021-07-09 16:25:13,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:25:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-07-09 16:25:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2286. [2021-07-09 16:25:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 2.7522975929978117) internal successors, (6289), 2285 states have internal predecessors, (6289), 0 states have call successors, (0), 0 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 16:25:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 6289 transitions. [2021-07-09 16:25:13,239 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 6289 transitions. Word has length 65 [2021-07-09 16:25:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:13,239 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 6289 transitions. [2021-07-09 16:25:13,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 16:25:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 6289 transitions. [2021-07-09 16:25:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-09 16:25:13,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:13,243 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:13,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:13,457 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1253969596, now seen corresponding path program 5 times [2021-07-09 16:25:13,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:13,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374655330] [2021-07-09 16:25:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:13,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374655330] [2021-07-09 16:25:13,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374655330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554097105] [2021-07-09 16:25:13,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:13,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:25:13,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 16:25:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:13,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554097105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:13,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:13,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 16:25:13,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036949029] [2021-07-09 16:25:13,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:25:13,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:25:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:25:13,791 INFO L87 Difference]: Start difference. First operand 2286 states and 6289 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:25:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:14,188 INFO L93 Difference]: Finished difference Result 3075 states and 8409 transitions. [2021-07-09 16:25:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:25:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 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 75 [2021-07-09 16:25:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:14,198 INFO L225 Difference]: With dead ends: 3075 [2021-07-09 16:25:14,198 INFO L226 Difference]: Without dead ends: 2571 [2021-07-09 16:25:14,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:25:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-07-09 16:25:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2486. [2021-07-09 16:25:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 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 16:25:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-07-09 16:25:14,240 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-07-09 16:25:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:14,240 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-07-09 16:25:14,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:25:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-07-09 16:25:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-09 16:25:14,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:14,249 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:14,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 16:25:14,467 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1222155355, now seen corresponding path program 6 times [2021-07-09 16:25:14,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:14,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625218999] [2021-07-09 16:25:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:14,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:14,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625218999] [2021-07-09 16:25:14,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625218999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:14,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667721294] [2021-07-09 16:25:14,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:14,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:25:14,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 16:25:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:14,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667721294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:14,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:14,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 16:25:14,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685488065] [2021-07-09 16:25:14,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:25:14,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:14,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:25:14,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:25:14,775 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:25:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:15,190 INFO L93 Difference]: Finished difference Result 3315 states and 9039 transitions. [2021-07-09 16:25:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:25:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 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 75 [2021-07-09 16:25:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:15,195 INFO L225 Difference]: With dead ends: 3315 [2021-07-09 16:25:15,195 INFO L226 Difference]: Without dead ends: 2706 [2021-07-09 16:25:15,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:25:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-07-09 16:25:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1634. [2021-07-09 16:25:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.7348438456827924) internal successors, (4466), 1633 states have internal predecessors, (4466), 0 states have call successors, (0), 0 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 16:25:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-07-09 16:25:15,228 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-07-09 16:25:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:15,228 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-07-09 16:25:15,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:25:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-07-09 16:25:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 16:25:15,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:15,231 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:15,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:25:15,447 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:15,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1121801400, now seen corresponding path program 7 times [2021-07-09 16:25:15,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:15,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732562910] [2021-07-09 16:25:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:15,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:15,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732562910] [2021-07-09 16:25:15,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732562910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:15,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407215881] [2021-07-09 16:25:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:25:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407215881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:15,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:15,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 16:25:15,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309346546] [2021-07-09 16:25:15,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:25:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:25:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:25:15,813 INFO L87 Difference]: Start difference. First operand 1634 states and 4466 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 16:25:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:16,245 INFO L93 Difference]: Finished difference Result 3270 states and 8949 transitions. [2021-07-09 16:25:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:25:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 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 80 [2021-07-09 16:25:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:16,250 INFO L225 Difference]: With dead ends: 3270 [2021-07-09 16:25:16,250 INFO L226 Difference]: Without dead ends: 2766 [2021-07-09 16:25:16,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=434, Invalid=1126, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:25:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-07-09 16:25:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1722. [2021-07-09 16:25:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 2.7408483439860545) internal successors, (4717), 1721 states have internal predecessors, (4717), 0 states have call successors, (0), 0 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 16:25:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 4717 transitions. [2021-07-09 16:25:16,304 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 4717 transitions. Word has length 80 [2021-07-09 16:25:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:16,304 INFO L482 AbstractCegarLoop]: Abstraction has 1722 states and 4717 transitions. [2021-07-09 16:25:16,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 16:25:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 4717 transitions. [2021-07-09 16:25:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-09 16:25:16,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:16,307 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:16,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 16:25:16,521 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash 681848981, now seen corresponding path program 8 times [2021-07-09 16:25:16,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:16,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400533498] [2021-07-09 16:25:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:16,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:16,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400533498] [2021-07-09 16:25:16,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400533498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:16,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189840872] [2021-07-09 16:25:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:16,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:16,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 16:25:16,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:16,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189840872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:16,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:16,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:16,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762575432] [2021-07-09 16:25:16,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:16,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:16,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:16,853 INFO L87 Difference]: Start difference. First operand 1722 states and 4717 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 16:25:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:17,473 INFO L93 Difference]: Finished difference Result 3876 states and 10514 transitions. [2021-07-09 16:25:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:25:17,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 85 [2021-07-09 16:25:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:17,488 INFO L225 Difference]: With dead ends: 3876 [2021-07-09 16:25:17,488 INFO L226 Difference]: Without dead ends: 3286 [2021-07-09 16:25:17,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:25:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-07-09 16:25:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2728. [2021-07-09 16:25:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 2.8173817381738173) internal successors, (7683), 2727 states have internal predecessors, (7683), 0 states have call successors, (0), 0 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 16:25:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 7683 transitions. [2021-07-09 16:25:17,533 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 7683 transitions. Word has length 85 [2021-07-09 16:25:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:17,533 INFO L482 AbstractCegarLoop]: Abstraction has 2728 states and 7683 transitions. [2021-07-09 16:25:17,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 16:25:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 7683 transitions. [2021-07-09 16:25:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-07-09 16:25:17,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:17,537 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:17,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 16:25:17,738 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1723804919, now seen corresponding path program 9 times [2021-07-09 16:25:17,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:17,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823068845] [2021-07-09 16:25:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:17,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823068845] [2021-07-09 16:25:17,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823068845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306204145] [2021-07-09 16:25:17,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:17,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 16:25:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:25:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:18,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306204145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:18,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:18,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-07-09 16:25:18,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066773853] [2021-07-09 16:25:18,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:18,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:18,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:18,075 INFO L87 Difference]: Start difference. First operand 2728 states and 7683 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 16:25:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:18,638 INFO L93 Difference]: Finished difference Result 3760 states and 10289 transitions. [2021-07-09 16:25:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:25:18,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 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 90 [2021-07-09 16:25:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:18,644 INFO L225 Difference]: With dead ends: 3760 [2021-07-09 16:25:18,644 INFO L226 Difference]: Without dead ends: 3166 [2021-07-09 16:25:18,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:25:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2021-07-09 16:25:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 1922. [2021-07-09 16:25:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 2.7418011452368556) internal successors, (5267), 1921 states have internal predecessors, (5267), 0 states have call successors, (0), 0 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 16:25:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 5267 transitions. [2021-07-09 16:25:18,678 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 5267 transitions. Word has length 90 [2021-07-09 16:25:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:18,678 INFO L482 AbstractCegarLoop]: Abstraction has 1922 states and 5267 transitions. [2021-07-09 16:25:18,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 16:25:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 5267 transitions. [2021-07-09 16:25:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-09 16:25:18,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:18,682 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:18,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:18,897 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1377812826, now seen corresponding path program 10 times [2021-07-09 16:25:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:18,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716260867] [2021-07-09 16:25:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:19,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:19,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716260867] [2021-07-09 16:25:19,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716260867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:19,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208593396] [2021-07-09 16:25:19,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:19,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 16:25:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:19,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208593396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:19,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:19,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-07-09 16:25:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882822835] [2021-07-09 16:25:19,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:25:19,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:25:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:25:19,206 INFO L87 Difference]: Start difference. First operand 1922 states and 5267 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 16:25:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:19,804 INFO L93 Difference]: Finished difference Result 3870 states and 10599 transitions. [2021-07-09 16:25:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:25:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 95 [2021-07-09 16:25:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:19,811 INFO L225 Difference]: With dead ends: 3870 [2021-07-09 16:25:19,811 INFO L226 Difference]: Without dead ends: 3366 [2021-07-09 16:25:19,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:25:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-07-09 16:25:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 2034. [2021-07-09 16:25:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 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 16:25:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-07-09 16:25:19,847 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-07-09 16:25:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:19,847 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-07-09 16:25:19,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 16:25:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-07-09 16:25:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-09 16:25:19,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:19,850 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:20,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:20,065 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1010524186, now seen corresponding path program 11 times [2021-07-09 16:25:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:20,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912964954] [2021-07-09 16:25:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:20,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912964954] [2021-07-09 16:25:20,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912964954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179323398] [2021-07-09 16:25:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:20,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:25:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:25:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:20,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179323398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:20,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:20,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:20,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820131779] [2021-07-09 16:25:20,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:20,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:20,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:20,428 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:21,189 INFO L93 Difference]: Finished difference Result 4566 states and 12389 transitions. [2021-07-09 16:25:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 16:25:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-09 16:25:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:21,196 INFO L225 Difference]: With dead ends: 4566 [2021-07-09 16:25:21,196 INFO L226 Difference]: Without dead ends: 3976 [2021-07-09 16:25:21,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 661.0ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 16:25:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-07-09 16:25:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3253. [2021-07-09 16:25:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 3252 states have (on average 2.82380073800738) internal successors, (9183), 3252 states have internal predecessors, (9183), 0 states have call successors, (0), 0 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 16:25:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 9183 transitions. [2021-07-09 16:25:21,243 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 9183 transitions. Word has length 100 [2021-07-09 16:25:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:21,243 INFO L482 AbstractCegarLoop]: Abstraction has 3253 states and 9183 transitions. [2021-07-09 16:25:21,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 9183 transitions. [2021-07-09 16:25:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-09 16:25:21,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:21,247 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:21,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:25:21,461 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1024633719, now seen corresponding path program 12 times [2021-07-09 16:25:21,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:21,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025093342] [2021-07-09 16:25:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:21,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025093342] [2021-07-09 16:25:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025093342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149831256] [2021-07-09 16:25:21,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:21,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:25:21,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 16:25:21,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:21,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149831256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:21,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:21,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:25:21,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876231188] [2021-07-09 16:25:21,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:25:21,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:25:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:25:21,804 INFO L87 Difference]: Start difference. First operand 3253 states and 9183 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:22,567 INFO L93 Difference]: Finished difference Result 4766 states and 12954 transitions. [2021-07-09 16:25:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 16:25:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-07-09 16:25:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:22,574 INFO L225 Difference]: With dead ends: 4766 [2021-07-09 16:25:22,574 INFO L226 Difference]: Without dead ends: 4176 [2021-07-09 16:25:22,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 16:25:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-07-09 16:25:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2324. [2021-07-09 16:25:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 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 16:25:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-07-09 16:25:22,612 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-07-09 16:25:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:22,613 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-07-09 16:25:22,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-07-09 16:25:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-09 16:25:22,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:22,616 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:22,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:22,833 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash -933655573, now seen corresponding path program 13 times [2021-07-09 16:25:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:22,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803676608] [2021-07-09 16:25:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:22,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:22,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803676608] [2021-07-09 16:25:22,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803676608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:22,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376806660] [2021-07-09 16:25:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:25:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376806660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:25:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523841876] [2021-07-09 16:25:23,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:25:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:25:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:25:23,222 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:24,042 INFO L93 Difference]: Finished difference Result 5306 states and 14425 transitions. [2021-07-09 16:25:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 16:25:24,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-07-09 16:25:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:24,049 INFO L225 Difference]: With dead ends: 5306 [2021-07-09 16:25:24,049 INFO L226 Difference]: Without dead ends: 4406 [2021-07-09 16:25:24,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=1015, Invalid=2891, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 16:25:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2021-07-09 16:25:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 2412. [2021-07-09 16:25:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.740356698465367) internal successors, (6607), 2411 states have internal predecessors, (6607), 0 states have call successors, (0), 0 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 16:25:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6607 transitions. [2021-07-09 16:25:24,095 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6607 transitions. Word has length 110 [2021-07-09 16:25:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:24,095 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6607 transitions. [2021-07-09 16:25:24,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6607 transitions. [2021-07-09 16:25:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-07-09 16:25:24,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:24,098 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:24,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 16:25:24,313 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1833208, now seen corresponding path program 14 times [2021-07-09 16:25:24,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:24,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134435182] [2021-07-09 16:25:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:24,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:24,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134435182] [2021-07-09 16:25:24,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134435182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:24,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285760394] [2021-07-09 16:25:24,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:24,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:24,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 16:25:24,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285760394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:24,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:24,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:25:24,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708819157] [2021-07-09 16:25:24,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:25:24,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:25:24,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:25:24,710 INFO L87 Difference]: Start difference. First operand 2412 states and 6607 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 16:25:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:25,647 INFO L93 Difference]: Finished difference Result 5576 states and 15190 transitions. [2021-07-09 16:25:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 16:25:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-07-09 16:25:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:25,653 INFO L225 Difference]: With dead ends: 5576 [2021-07-09 16:25:25,653 INFO L226 Difference]: Without dead ends: 4676 [2021-07-09 16:25:25,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 860.3ms TimeCoverageRelationStatistics Valid=1118, Invalid=3172, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 16:25:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-07-09 16:25:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 2524. [2021-07-09 16:25:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 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 16:25:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-07-09 16:25:25,690 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-07-09 16:25:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:25,690 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-07-09 16:25:25,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 16:25:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-07-09 16:25:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-07-09 16:25:25,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:25,694 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:25,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:25,909 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1068754556, now seen corresponding path program 15 times [2021-07-09 16:25:25,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:25,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475943510] [2021-07-09 16:25:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475943510] [2021-07-09 16:25:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475943510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223078192] [2021-07-09 16:25:26,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:26,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:25:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:26,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:26,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223078192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:26,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:26,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-07-09 16:25:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481484771] [2021-07-09 16:25:26,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:25:26,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:25:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:25:26,325 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 16:25:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:27,296 INFO L93 Difference]: Finished difference Result 5370 states and 14725 transitions. [2021-07-09 16:25:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 16:25:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 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 120 [2021-07-09 16:25:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:27,302 INFO L225 Difference]: With dead ends: 5370 [2021-07-09 16:25:27,302 INFO L226 Difference]: Without dead ends: 4466 [2021-07-09 16:25:27,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 869.4ms TimeCoverageRelationStatistics Valid=1160, Invalid=3000, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 16:25:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2021-07-09 16:25:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2522. [2021-07-09 16:25:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 2.7437524791749306) internal successors, (6917), 2521 states have internal predecessors, (6917), 0 states have call successors, (0), 0 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 16:25:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 6917 transitions. [2021-07-09 16:25:27,355 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 6917 transitions. Word has length 120 [2021-07-09 16:25:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:27,355 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 6917 transitions. [2021-07-09 16:25:27,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 16:25:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 6917 transitions. [2021-07-09 16:25:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-07-09 16:25:27,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:27,359 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:27,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 16:25:27,577 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash -762781351, now seen corresponding path program 16 times [2021-07-09 16:25:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:27,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988129285] [2021-07-09 16:25:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:27,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988129285] [2021-07-09 16:25:27,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988129285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796614289] [2021-07-09 16:25:27,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:27,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:27,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 16:25:27,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:28,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796614289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:28,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:28,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-07-09 16:25:28,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623341525] [2021-07-09 16:25:28,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 16:25:28,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 16:25:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:25:28,017 INFO L87 Difference]: Start difference. First operand 2522 states and 6917 transitions. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 16:25:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:28,862 INFO L93 Difference]: Finished difference Result 5070 states and 13899 transitions. [2021-07-09 16:25:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 16:25:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 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 125 [2021-07-09 16:25:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:28,869 INFO L225 Difference]: With dead ends: 5070 [2021-07-09 16:25:28,869 INFO L226 Difference]: Without dead ends: 4566 [2021-07-09 16:25:28,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 16:25:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2021-07-09 16:25:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 2634. [2021-07-09 16:25:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 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 16:25:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-07-09 16:25:28,906 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-07-09 16:25:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:28,906 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-07-09 16:25:28,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 16:25:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-07-09 16:25:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-07-09 16:25:28,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:28,909 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:29,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 16:25:29,119 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1964048435, now seen corresponding path program 17 times [2021-07-09 16:25:29,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:29,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637681332] [2021-07-09 16:25:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:29,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:29,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637681332] [2021-07-09 16:25:29,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637681332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:29,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046691943] [2021-07-09 16:25:29,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:29,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:25:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:25:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:29,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046691943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:29,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:29,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-07-09 16:25:29,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968830803] [2021-07-09 16:25:29,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 16:25:29,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 16:25:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:25:29,568 INFO L87 Difference]: Start difference. First operand 2634 states and 7216 transitions. Second operand has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 16:25:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:30,500 INFO L93 Difference]: Finished difference Result 5270 states and 14449 transitions. [2021-07-09 16:25:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 16:25:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 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 130 [2021-07-09 16:25:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:30,508 INFO L225 Difference]: With dead ends: 5270 [2021-07-09 16:25:30,508 INFO L226 Difference]: Without dead ends: 4766 [2021-07-09 16:25:30,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 870.3ms TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 16:25:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-07-09 16:25:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 2722. [2021-07-09 16:25:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 2.7442116868798236) internal successors, (7467), 2721 states have internal predecessors, (7467), 0 states have call successors, (0), 0 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 16:25:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 7467 transitions. [2021-07-09 16:25:30,565 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 7467 transitions. Word has length 130 [2021-07-09 16:25:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:30,566 INFO L482 AbstractCegarLoop]: Abstraction has 2722 states and 7467 transitions. [2021-07-09 16:25:30,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 16:25:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 7467 transitions. [2021-07-09 16:25:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-07-09 16:25:30,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:30,569 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:30,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 16:25:30,785 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2067674518, now seen corresponding path program 18 times [2021-07-09 16:25:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:30,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9981150] [2021-07-09 16:25:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:30,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9981150] [2021-07-09 16:25:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9981150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942973579] [2021-07-09 16:25:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:31,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:25:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:31,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 16:25:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:31,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942973579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:31,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:31,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-07-09 16:25:31,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334942694] [2021-07-09 16:25:31,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 16:25:31,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 16:25:31,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:25:31,248 INFO L87 Difference]: Start difference. First operand 2722 states and 7467 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 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 16:25:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:32,298 INFO L93 Difference]: Finished difference Result 5876 states and 16014 transitions. [2021-07-09 16:25:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 16:25:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 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 135 [2021-07-09 16:25:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:32,307 INFO L225 Difference]: With dead ends: 5876 [2021-07-09 16:25:32,307 INFO L226 Difference]: Without dead ends: 5286 [2021-07-09 16:25:32,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 987.8ms TimeCoverageRelationStatistics Valid=1574, Invalid=4278, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 16:25:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-07-09 16:25:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4478. [2021-07-09 16:25:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.832923832923833) internal successors, (12683), 4477 states have internal predecessors, (12683), 0 states have call successors, (0), 0 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 16:25:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12683 transitions. [2021-07-09 16:25:32,363 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12683 transitions. Word has length 135 [2021-07-09 16:25:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12683 transitions. [2021-07-09 16:25:32,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 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 16:25:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12683 transitions. [2021-07-09 16:25:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-07-09 16:25:32,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:32,369 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:32,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 16:25:32,585 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1170511906, now seen corresponding path program 19 times [2021-07-09 16:25:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:32,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661337515] [2021-07-09 16:25:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:32,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:32,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661337515] [2021-07-09 16:25:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661337515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:32,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893732936] [2021-07-09 16:25:32,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 16:25:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:33,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893732936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:33,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:33,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-07-09 16:25:33,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881402465] [2021-07-09 16:25:33,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 16:25:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 16:25:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:25:33,070 INFO L87 Difference]: Start difference. First operand 4478 states and 12683 transitions. Second operand has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 16:25:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:34,243 INFO L93 Difference]: Finished difference Result 5760 states and 15789 transitions. [2021-07-09 16:25:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 16:25:34,245 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 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 140 [2021-07-09 16:25:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:34,253 INFO L225 Difference]: With dead ends: 5760 [2021-07-09 16:25:34,253 INFO L226 Difference]: Without dead ends: 5166 [2021-07-09 16:25:34,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=1634, Invalid=4066, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 16:25:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-07-09 16:25:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 2922. [2021-07-09 16:25:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 2.7446080109551523) internal successors, (8017), 2921 states have internal predecessors, (8017), 0 states have call successors, (0), 0 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 16:25:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8017 transitions. [2021-07-09 16:25:34,318 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8017 transitions. Word has length 140 [2021-07-09 16:25:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:34,318 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 8017 transitions. [2021-07-09 16:25:34,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 16:25:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8017 transitions. [2021-07-09 16:25:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-07-09 16:25:34,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:34,322 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:34,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 16:25:34,539 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -623160773, now seen corresponding path program 20 times [2021-07-09 16:25:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:34,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413659503] [2021-07-09 16:25:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:34,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:34,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413659503] [2021-07-09 16:25:34,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413659503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:34,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975250765] [2021-07-09 16:25:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:34,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:34,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:34,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 16:25:34,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975250765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:35,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:35,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-07-09 16:25:35,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484207065] [2021-07-09 16:25:35,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 16:25:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 16:25:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:25:35,070 INFO L87 Difference]: Start difference. First operand 2922 states and 8017 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 16:25:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:36,260 INFO L93 Difference]: Finished difference Result 6276 states and 17114 transitions. [2021-07-09 16:25:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 16:25:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 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 145 [2021-07-09 16:25:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:36,268 INFO L225 Difference]: With dead ends: 6276 [2021-07-09 16:25:36,268 INFO L226 Difference]: Without dead ends: 5686 [2021-07-09 16:25:36,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1135.7ms TimeCoverageRelationStatistics Valid=1844, Invalid=4962, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 16:25:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-07-09 16:25:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4828. [2021-07-09 16:25:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.834679925419515) internal successors, (13683), 4827 states have internal predecessors, (13683), 0 states have call successors, (0), 0 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 16:25:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13683 transitions. [2021-07-09 16:25:36,331 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13683 transitions. Word has length 145 [2021-07-09 16:25:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:36,331 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13683 transitions. [2021-07-09 16:25:36,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 16:25:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13683 transitions. [2021-07-09 16:25:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-07-09 16:25:36,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:36,338 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:36,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:36,541 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 106278575, now seen corresponding path program 21 times [2021-07-09 16:25:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:36,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985355607] [2021-07-09 16:25:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:36,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:36,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985355607] [2021-07-09 16:25:36,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985355607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:36,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838728646] [2021-07-09 16:25:36,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:36,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 16:25:36,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:36,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 16:25:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:37,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838728646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:37,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:37,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-07-09 16:25:37,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342666956] [2021-07-09 16:25:37,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 16:25:37,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 16:25:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:25:37,124 INFO L87 Difference]: Start difference. First operand 4828 states and 13683 transitions. Second operand has 30 states, 30 states have (on average 5.1) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 16:25:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:38,365 INFO L93 Difference]: Finished difference Result 6160 states and 16889 transitions. [2021-07-09 16:25:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 16:25:38,365 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.1) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 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 150 [2021-07-09 16:25:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:38,376 INFO L225 Difference]: With dead ends: 6160 [2021-07-09 16:25:38,376 INFO L226 Difference]: Without dead ends: 5566 [2021-07-09 16:25:38,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=1911, Invalid=4731, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 16:25:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2021-07-09 16:25:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 3122. [2021-07-09 16:25:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 2.744953540531881) internal successors, (8567), 3121 states have internal predecessors, (8567), 0 states have call successors, (0), 0 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 16:25:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 8567 transitions. [2021-07-09 16:25:38,419 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 8567 transitions. Word has length 150 [2021-07-09 16:25:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:38,419 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 8567 transitions. [2021-07-09 16:25:38,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.1) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 16:25:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 8567 transitions. [2021-07-09 16:25:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-07-09 16:25:38,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:38,423 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:38,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 16:25:38,623 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:38,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1320028364, now seen corresponding path program 22 times [2021-07-09 16:25:38,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:38,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859574542] [2021-07-09 16:25:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:38,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:38,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859574542] [2021-07-09 16:25:38,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859574542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:38,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551457429] [2021-07-09 16:25:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:38,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 16:25:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:39,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551457429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:39,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:39,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-07-09 16:25:39,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766938254] [2021-07-09 16:25:39,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 16:25:39,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 16:25:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:25:39,173 INFO L87 Difference]: Start difference. First operand 3122 states and 8567 transitions. Second operand has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:25:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:40,474 INFO L93 Difference]: Finished difference Result 6676 states and 18214 transitions. [2021-07-09 16:25:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 16:25:40,474 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 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 155 [2021-07-09 16:25:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:40,482 INFO L225 Difference]: With dead ends: 6676 [2021-07-09 16:25:40,482 INFO L226 Difference]: Without dead ends: 6086 [2021-07-09 16:25:40,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 1267.0ms TimeCoverageRelationStatistics Valid=2136, Invalid=5696, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 16:25:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-07-09 16:25:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5178. [2021-07-09 16:25:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.836198570600734) internal successors, (14683), 5177 states have internal predecessors, (14683), 0 states have call successors, (0), 0 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 16:25:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 14683 transitions. [2021-07-09 16:25:40,570 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 14683 transitions. Word has length 155 [2021-07-09 16:25:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:40,570 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 14683 transitions. [2021-07-09 16:25:40,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:25:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 14683 transitions. [2021-07-09 16:25:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-07-09 16:25:40,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:40,577 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:40,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:40,785 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1853463488, now seen corresponding path program 23 times [2021-07-09 16:25:40,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:40,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262832007] [2021-07-09 16:25:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:41,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:41,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262832007] [2021-07-09 16:25:41,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262832007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:41,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284156805] [2021-07-09 16:25:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:41,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 16:25:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 16:25:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:41,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284156805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:41,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:41,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-07-09 16:25:41,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925175950] [2021-07-09 16:25:41,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 16:25:41,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 16:25:41,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:25:41,334 INFO L87 Difference]: Start difference. First operand 5178 states and 14683 transitions. Second operand has 32 states, 32 states have (on average 5.09375) internal successors, (163), 32 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 16:25:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:42,871 INFO L93 Difference]: Finished difference Result 6560 states and 17989 transitions. [2021-07-09 16:25:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 16:25:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.09375) internal successors, (163), 32 states have internal predecessors, (163), 0 states have call successors, (0), 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 160 [2021-07-09 16:25:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:42,880 INFO L225 Difference]: With dead ends: 6560 [2021-07-09 16:25:42,880 INFO L226 Difference]: Without dead ends: 5966 [2021-07-09 16:25:42,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1365.0ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 16:25:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5966 states. [2021-07-09 16:25:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5966 to 3322. [2021-07-09 16:25:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3321 states have (on average 2.745257452574526) internal successors, (9117), 3321 states have internal predecessors, (9117), 0 states have call successors, (0), 0 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 16:25:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 9117 transitions. [2021-07-09 16:25:42,930 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 9117 transitions. Word has length 160 [2021-07-09 16:25:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:42,930 INFO L482 AbstractCegarLoop]: Abstraction has 3322 states and 9117 transitions. [2021-07-09 16:25:42,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.09375) internal successors, (163), 32 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 16:25:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 9117 transitions. [2021-07-09 16:25:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-07-09 16:25:42,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:42,934 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:43,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 16:25:43,149 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1868661219, now seen corresponding path program 24 times [2021-07-09 16:25:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:43,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358366056] [2021-07-09 16:25:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:43,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:43,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358366056] [2021-07-09 16:25:43,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358366056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:43,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665457770] [2021-07-09 16:25:43,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:43,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 16:25:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 16:25:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:43,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665457770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:43,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:43,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-07-09 16:25:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944600128] [2021-07-09 16:25:43,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 16:25:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:43,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 16:25:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:25:43,745 INFO L87 Difference]: Start difference. First operand 3322 states and 9117 transitions. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 16:25:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:45,124 INFO L93 Difference]: Finished difference Result 6670 states and 18299 transitions. [2021-07-09 16:25:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 16:25:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 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 165 [2021-07-09 16:25:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:45,132 INFO L225 Difference]: With dead ends: 6670 [2021-07-09 16:25:45,132 INFO L226 Difference]: Without dead ends: 6166 [2021-07-09 16:25:45,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1365.8ms TimeCoverageRelationStatistics Valid=2366, Invalid=5824, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 16:25:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6166 states. [2021-07-09 16:25:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6166 to 3434. [2021-07-09 16:25:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7427905621905038) internal successors, (9416), 3433 states have internal predecessors, (9416), 0 states have call successors, (0), 0 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 16:25:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-07-09 16:25:45,175 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-07-09 16:25:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:45,175 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-07-09 16:25:45,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 16:25:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-07-09 16:25:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-07-09 16:25:45,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:45,180 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:45,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 16:25:45,389 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -392030063, now seen corresponding path program 25 times [2021-07-09 16:25:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851156575] [2021-07-09 16:25:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:45,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851156575] [2021-07-09 16:25:45,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851156575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861755193] [2021-07-09 16:25:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 16:25:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:46,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861755193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:46,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:46,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-09 16:25:46,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973049266] [2021-07-09 16:25:46,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 16:25:46,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 16:25:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:25:46,017 INFO L87 Difference]: Start difference. First operand 3434 states and 9416 transitions. Second operand has 35 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 16:25:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:47,669 INFO L93 Difference]: Finished difference Result 7366 states and 20089 transitions. [2021-07-09 16:25:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 16:25:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 0 states have call successors, (0), 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 170 [2021-07-09 16:25:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:47,680 INFO L225 Difference]: With dead ends: 7366 [2021-07-09 16:25:47,680 INFO L226 Difference]: Without dead ends: 6776 [2021-07-09 16:25:47,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 1585.2ms TimeCoverageRelationStatistics Valid=2617, Invalid=6889, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 16:25:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-07-09 16:25:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5703. [2021-07-09 16:25:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5703 states, 5702 states have (on average 2.8381269729919327) internal successors, (16183), 5702 states have internal predecessors, (16183), 0 states have call successors, (0), 0 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 16:25:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5703 states to 5703 states and 16183 transitions. [2021-07-09 16:25:47,762 INFO L78 Accepts]: Start accepts. Automaton has 5703 states and 16183 transitions. Word has length 170 [2021-07-09 16:25:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:47,762 INFO L482 AbstractCegarLoop]: Abstraction has 5703 states and 16183 transitions. [2021-07-09 16:25:47,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 16:25:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5703 states and 16183 transitions. [2021-07-09 16:25:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-07-09 16:25:47,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:47,768 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:47,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:25:47,977 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash -929218002, now seen corresponding path program 26 times [2021-07-09 16:25:47,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:47,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986232815] [2021-07-09 16:25:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:48,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:48,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986232815] [2021-07-09 16:25:48,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986232815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:48,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203770389] [2021-07-09 16:25:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 16:25:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:48,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203770389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:48,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:48,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-07-09 16:25:48,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087696204] [2021-07-09 16:25:48,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 16:25:48,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 16:25:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:25:48,595 INFO L87 Difference]: Start difference. First operand 5703 states and 16183 transitions. Second operand has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 16:25:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:50,110 INFO L93 Difference]: Finished difference Result 7160 states and 19639 transitions. [2021-07-09 16:25:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 16:25:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 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 175 [2021-07-09 16:25:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:50,120 INFO L225 Difference]: With dead ends: 7160 [2021-07-09 16:25:50,120 INFO L226 Difference]: Without dead ends: 6656 [2021-07-09 16:25:50,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 1474.6ms TimeCoverageRelationStatistics Valid=2698, Invalid=6614, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 16:25:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-07-09 16:25:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 5878. [2021-07-09 16:25:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8386932108218477) internal successors, (16683), 5877 states have internal predecessors, (16683), 0 states have call successors, (0), 0 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 16:25:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-07-09 16:25:50,189 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-07-09 16:25:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:50,189 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-07-09 16:25:50,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 16:25:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-07-09 16:25:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-07-09 16:25:50,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:50,195 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:50,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 16:25:50,396 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:50,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1141463970, now seen corresponding path program 27 times [2021-07-09 16:25:50,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:50,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776526282] [2021-07-09 16:25:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:50,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776526282] [2021-07-09 16:25:50,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776526282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817642483] [2021-07-09 16:25:50,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:50,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-09 16:25:50,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:50,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 16:25:50,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:51,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817642483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:51,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:51,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-07-09 16:25:51,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900594031] [2021-07-09 16:25:51,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 16:25:51,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:51,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 16:25:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:25:51,124 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 16:25:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:52,901 INFO L93 Difference]: Finished difference Result 8176 states and 22325 transitions. [2021-07-09 16:25:52,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 16:25:52,901 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 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 180 [2021-07-09 16:25:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:52,911 INFO L225 Difference]: With dead ends: 8176 [2021-07-09 16:25:52,911 INFO L226 Difference]: Without dead ends: 7276 [2021-07-09 16:25:52,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 1813.6ms TimeCoverageRelationStatistics Valid=2982, Invalid=7938, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 16:25:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-07-09 16:25:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6053. [2021-07-09 16:25:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6053 states, 6052 states have (on average 2.8392267019167217) internal successors, (17183), 6052 states have internal predecessors, (17183), 0 states have call successors, (0), 0 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 16:25:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 17183 transitions. [2021-07-09 16:25:52,984 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 17183 transitions. Word has length 180 [2021-07-09 16:25:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:52,984 INFO L482 AbstractCegarLoop]: Abstraction has 6053 states and 17183 transitions. [2021-07-09 16:25:52,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 16:25:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 17183 transitions. [2021-07-09 16:25:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-07-09 16:25:52,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:52,991 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:53,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 16:25:53,197 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1759058689, now seen corresponding path program 28 times [2021-07-09 16:25:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:53,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008664100] [2021-07-09 16:25:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:53,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:53,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008664100] [2021-07-09 16:25:53,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008664100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:53,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142993313] [2021-07-09 16:25:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:53,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 16:25:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:53,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142993313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:53,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:53,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-07-09 16:25:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449169036] [2021-07-09 16:25:53,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 16:25:53,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 16:25:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:25:53,885 INFO L87 Difference]: Start difference. First operand 6053 states and 17183 transitions. Second operand has 38 states, 38 states have (on average 4.973684210526316) internal successors, (189), 38 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 16:25:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:55,649 INFO L93 Difference]: Finished difference Result 7966 states and 21754 transitions. [2021-07-09 16:25:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 16:25:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.973684210526316) internal successors, (189), 38 states have internal predecessors, (189), 0 states have call successors, (0), 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 185 [2021-07-09 16:25:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:55,659 INFO L225 Difference]: With dead ends: 7966 [2021-07-09 16:25:55,659 INFO L226 Difference]: Without dead ends: 7376 [2021-07-09 16:25:55,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 1671.6ms TimeCoverageRelationStatistics Valid=3144, Invalid=8198, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 16:25:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-07-09 16:25:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 3924. [2021-07-09 16:25:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 2.7417792505735408) internal successors, (10756), 3923 states have internal predecessors, (10756), 0 states have call successors, (0), 0 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 16:25:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 10756 transitions. [2021-07-09 16:25:55,713 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 10756 transitions. Word has length 185 [2021-07-09 16:25:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:55,713 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 10756 transitions. [2021-07-09 16:25:55,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 4.973684210526316) internal successors, (189), 38 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 16:25:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 10756 transitions. [2021-07-09 16:25:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-07-09 16:25:55,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:55,718 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:55,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:55,929 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2002207373, now seen corresponding path program 29 times [2021-07-09 16:25:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199712639] [2021-07-09 16:25:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:56,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199712639] [2021-07-09 16:25:56,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199712639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977582346] [2021-07-09 16:25:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:56,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-09 16:25:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:56,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 16:25:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:56,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977582346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:56,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:56,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-07-09 16:25:56,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044954422] [2021-07-09 16:25:56,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 16:25:56,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:56,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 16:25:56,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:25:56,633 INFO L87 Difference]: Start difference. First operand 3924 states and 10756 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 16:25:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:58,549 INFO L93 Difference]: Finished difference Result 8506 states and 23225 transitions. [2021-07-09 16:25:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 16:25:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 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 190 [2021-07-09 16:25:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:58,559 INFO L225 Difference]: With dead ends: 8506 [2021-07-09 16:25:58,559 INFO L226 Difference]: Without dead ends: 7606 [2021-07-09 16:25:58,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3395 ImplicationChecksByTransitivity, 1828.1ms TimeCoverageRelationStatistics Valid=3351, Invalid=8859, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 16:25:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2021-07-09 16:25:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 4012. [2021-07-09 16:25:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4012 states, 4011 states have (on average 2.744203440538519) internal successors, (11007), 4011 states have internal predecessors, (11007), 0 states have call successors, (0), 0 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 16:25:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 11007 transitions. [2021-07-09 16:25:58,613 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 11007 transitions. Word has length 190 [2021-07-09 16:25:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:58,613 INFO L482 AbstractCegarLoop]: Abstraction has 4012 states and 11007 transitions. [2021-07-09 16:25:58,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 16:25:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 11007 transitions. [2021-07-09 16:25:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-07-09 16:25:58,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:58,617 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:58,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 16:25:58,825 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash -700189040, now seen corresponding path program 30 times [2021-07-09 16:25:58,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:58,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628575052] [2021-07-09 16:25:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:59,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:59,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628575052] [2021-07-09 16:25:59,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628575052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:59,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874793865] [2021-07-09 16:25:59,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:59,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-09 16:25:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 16:25:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:59,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874793865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:59,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:59,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-07-09 16:25:59,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57301050] [2021-07-09 16:25:59,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 16:25:59,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 16:25:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:25:59,555 INFO L87 Difference]: Start difference. First operand 4012 states and 11007 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 16:26:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:01,449 INFO L93 Difference]: Finished difference Result 8776 states and 23990 transitions. [2021-07-09 16:26:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 16:26:01,449 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 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 195 [2021-07-09 16:26:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:01,460 INFO L225 Difference]: With dead ends: 8776 [2021-07-09 16:26:01,461 INFO L226 Difference]: Without dead ends: 7876 [2021-07-09 16:26:01,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 1883.7ms TimeCoverageRelationStatistics Valid=3542, Invalid=9340, Unknown=0, NotChecked=0, Total=12882 [2021-07-09 16:26:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-07-09 16:26:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 4124. [2021-07-09 16:26:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4124 states, 4123 states have (on average 2.742178025709435) internal successors, (11306), 4123 states have internal predecessors, (11306), 0 states have call successors, (0), 0 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 16:26:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4124 states to 4124 states and 11306 transitions. [2021-07-09 16:26:01,523 INFO L78 Accepts]: Start accepts. Automaton has 4124 states and 11306 transitions. Word has length 195 [2021-07-09 16:26:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:01,524 INFO L482 AbstractCegarLoop]: Abstraction has 4124 states and 11306 transitions. [2021-07-09 16:26:01,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 16:26:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4124 states and 11306 transitions. [2021-07-09 16:26:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-07-09 16:26:01,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:01,528 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:01,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 16:26:01,729 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 150523396, now seen corresponding path program 31 times [2021-07-09 16:26:01,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:01,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7185507] [2021-07-09 16:26:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:02,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7185507] [2021-07-09 16:26:02,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7185507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865721704] [2021-07-09 16:26:02,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 16:26:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:02,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865721704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:02,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:02,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-07-09 16:26:02,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451719354] [2021-07-09 16:26:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 16:26:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 16:26:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1209, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:26:02,494 INFO L87 Difference]: Start difference. First operand 4124 states and 11306 transitions. Second operand has 40 states, 40 states have (on average 5.075) internal successors, (203), 40 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 16:26:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:04,487 INFO L93 Difference]: Finished difference Result 8570 states and 23525 transitions. [2021-07-09 16:26:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 16:26:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.075) internal successors, (203), 40 states have internal predecessors, (203), 0 states have call successors, (0), 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 200 [2021-07-09 16:26:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:04,498 INFO L225 Difference]: With dead ends: 8570 [2021-07-09 16:26:04,498 INFO L226 Difference]: Without dead ends: 7666 [2021-07-09 16:26:04,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 2021.2ms TimeCoverageRelationStatistics Valid=3640, Invalid=9016, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 16:26:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7666 states. [2021-07-09 16:26:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7666 to 4122. [2021-07-09 16:26:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 2.7461781121087117) internal successors, (11317), 4121 states have internal predecessors, (11317), 0 states have call successors, (0), 0 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 16:26:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 11317 transitions. [2021-07-09 16:26:04,559 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 11317 transitions. Word has length 200 [2021-07-09 16:26:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:04,559 INFO L482 AbstractCegarLoop]: Abstraction has 4122 states and 11317 transitions. [2021-07-09 16:26:04,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.075) internal successors, (203), 40 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 16:26:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 11317 transitions. [2021-07-09 16:26:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-07-09 16:26:04,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:04,564 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:04,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:04,764 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 445187809, now seen corresponding path program 32 times [2021-07-09 16:26:04,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:04,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043802020] [2021-07-09 16:26:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 0 proven. 1346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:05,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:05,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043802020] [2021-07-09 16:26:05,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043802020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:05,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587681822] [2021-07-09 16:26:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:05,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 16:26:05,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 0 proven. 1346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:05,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587681822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:05,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:05,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-07-09 16:26:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729858508] [2021-07-09 16:26:05,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 16:26:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 16:26:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:26:05,523 INFO L87 Difference]: Start difference. First operand 4122 states and 11317 transitions. Second operand has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 16:26:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:07,491 INFO L93 Difference]: Finished difference Result 8270 states and 22699 transitions. [2021-07-09 16:26:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 16:26:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 0 states have call successors, (0), 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 205 [2021-07-09 16:26:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:07,502 INFO L225 Difference]: With dead ends: 8270 [2021-07-09 16:26:07,502 INFO L226 Difference]: Without dead ends: 7766 [2021-07-09 16:26:07,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3797 ImplicationChecksByTransitivity, 1967.3ms TimeCoverageRelationStatistics Valid=3826, Invalid=9284, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 16:26:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2021-07-09 16:26:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 4234. [2021-07-09 16:26:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 2.7441530829199148) internal successors, (11616), 4233 states have internal predecessors, (11616), 0 states have call successors, (0), 0 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 16:26:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 11616 transitions. [2021-07-09 16:26:07,570 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 11616 transitions. Word has length 205 [2021-07-09 16:26:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:07,571 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 11616 transitions. [2021-07-09 16:26:07,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 16:26:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 11616 transitions. [2021-07-09 16:26:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-07-09 16:26:07,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:07,575 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:07,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 16:26:07,776 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash 100539733, now seen corresponding path program 33 times [2021-07-09 16:26:07,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:07,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611894833] [2021-07-09 16:26:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:08,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:08,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611894833] [2021-07-09 16:26:08,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611894833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:08,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578345420] [2021-07-09 16:26:08,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:08,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-09 16:26:08,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 16:26:08,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:08,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578345420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:08,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:08,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-07-09 16:26:08,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132653247] [2021-07-09 16:26:08,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 16:26:08,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:08,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 16:26:08,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:08,648 INFO L87 Difference]: Start difference. First operand 4234 states and 11616 transitions. Second operand has 43 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 16:26:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:10,901 INFO L93 Difference]: Finished difference Result 8966 states and 24489 transitions. [2021-07-09 16:26:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 16:26:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 0 states have call successors, (0), 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 210 [2021-07-09 16:26:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:10,912 INFO L225 Difference]: With dead ends: 8966 [2021-07-09 16:26:10,912 INFO L226 Difference]: Without dead ends: 8376 [2021-07-09 16:26:10,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4134 ImplicationChecksByTransitivity, 2247.6ms TimeCoverageRelationStatistics Valid=4137, Invalid=10625, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 16:26:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-07-09 16:26:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 7103. [2021-07-09 16:26:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 2.841875528020276) internal successors, (20183), 7102 states have internal predecessors, (20183), 0 states have call successors, (0), 0 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 16:26:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 20183 transitions. [2021-07-09 16:26:10,997 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 20183 transitions. Word has length 210 [2021-07-09 16:26:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:10,998 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 20183 transitions. [2021-07-09 16:26:10,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 16:26:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 20183 transitions. [2021-07-09 16:26:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-07-09 16:26:11,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:11,006 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:11,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:11,220 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash -199842318, now seen corresponding path program 34 times [2021-07-09 16:26:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:11,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877249085] [2021-07-09 16:26:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:11,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877249085] [2021-07-09 16:26:11,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877249085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968734534] [2021-07-09 16:26:11,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:11,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:11,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 16:26:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:12,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968734534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:12,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:12,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2021-07-09 16:26:12,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850278343] [2021-07-09 16:26:12,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 16:26:12,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 16:26:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1480, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:12,088 INFO L87 Difference]: Start difference. First operand 7103 states and 20183 transitions. Second operand has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 44 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 16:26:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:14,381 INFO L93 Difference]: Finished difference Result 9166 states and 25054 transitions. [2021-07-09 16:26:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 16:26:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 44 states have internal predecessors, (219), 0 states have call successors, (0), 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 215 [2021-07-09 16:26:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:14,393 INFO L225 Difference]: With dead ends: 9166 [2021-07-09 16:26:14,393 INFO L226 Difference]: Without dead ends: 8576 [2021-07-09 16:26:14,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4533 ImplicationChecksByTransitivity, 2279.5ms TimeCoverageRelationStatistics Valid=4350, Invalid=11150, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 16:26:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-07-09 16:26:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 4524. [2021-07-09 16:26:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 2.7428697766968826) internal successors, (12406), 4523 states have internal predecessors, (12406), 0 states have call successors, (0), 0 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 16:26:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 12406 transitions. [2021-07-09 16:26:14,458 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 12406 transitions. Word has length 215 [2021-07-09 16:26:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:14,459 INFO L482 AbstractCegarLoop]: Abstraction has 4524 states and 12406 transitions. [2021-07-09 16:26:14,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 44 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 16:26:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 12406 transitions. [2021-07-09 16:26:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-07-09 16:26:14,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:14,464 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:14,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 16:26:14,680 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash -263636122, now seen corresponding path program 35 times [2021-07-09 16:26:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:14,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934408751] [2021-07-09 16:26:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:15,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:15,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934408751] [2021-07-09 16:26:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934408751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:15,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518095234] [2021-07-09 16:26:15,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:15,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-09 16:26:15,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:15,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 16:26:15,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:15,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518095234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:15,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:15,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-07-09 16:26:15,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016433789] [2021-07-09 16:26:15,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 16:26:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 16:26:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:15,566 INFO L87 Difference]: Start difference. First operand 4524 states and 12406 transitions. Second operand has 44 states, 44 states have (on average 5.068181818181818) internal successors, (223), 44 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 16:26:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:17,921 INFO L93 Difference]: Finished difference Result 9370 states and 25725 transitions. [2021-07-09 16:26:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 16:26:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.068181818181818) internal successors, (223), 44 states have internal predecessors, (223), 0 states have call successors, (0), 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 220 [2021-07-09 16:26:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:17,932 INFO L225 Difference]: With dead ends: 9370 [2021-07-09 16:26:17,932 INFO L226 Difference]: Without dead ends: 8466 [2021-07-09 16:26:17,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 2353.2ms TimeCoverageRelationStatistics Valid=4480, Invalid=11020, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 16:26:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-07-09 16:26:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 4522. [2021-07-09 16:26:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 2.7465162574651627) internal successors, (12417), 4521 states have internal predecessors, (12417), 0 states have call successors, (0), 0 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 16:26:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 12417 transitions. [2021-07-09 16:26:18,019 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 12417 transitions. Word has length 220 [2021-07-09 16:26:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:18,020 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 12417 transitions. [2021-07-09 16:26:18,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 5.068181818181818) internal successors, (223), 44 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 16:26:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 12417 transitions. [2021-07-09 16:26:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:26:18,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:18,025 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:18,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 16:26:18,245 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash -275160125, now seen corresponding path program 36 times [2021-07-09 16:26:18,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:18,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628745177] [2021-07-09 16:26:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:18,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628745177] [2021-07-09 16:26:18,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628745177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:18,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367250164] [2021-07-09 16:26:18,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:18,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-09 16:26:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 16:26:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:19,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367250164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:19,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:19,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-07-09 16:26:19,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848101401] [2021-07-09 16:26:19,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 16:26:19,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 16:26:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:26:19,180 INFO L87 Difference]: Start difference. First operand 4522 states and 12417 transitions. Second operand has 45 states, 45 states have (on average 5.066666666666666) internal successors, (228), 45 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 16:26:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:21,513 INFO L93 Difference]: Finished difference Result 9070 states and 24899 transitions. [2021-07-09 16:26:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 16:26:21,514 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.066666666666666) internal successors, (228), 45 states have internal predecessors, (228), 0 states have call successors, (0), 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 225 [2021-07-09 16:26:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:21,524 INFO L225 Difference]: With dead ends: 9070 [2021-07-09 16:26:21,524 INFO L226 Difference]: Without dead ends: 8566 [2021-07-09 16:26:21,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4665 ImplicationChecksByTransitivity, 2375.6ms TimeCoverageRelationStatistics Valid=4688, Invalid=11314, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 16:26:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8566 states. [2021-07-09 16:26:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8566 to 4634. [2021-07-09 16:26:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4633 states have (on average 2.7446578890567666) internal successors, (12716), 4633 states have internal predecessors, (12716), 0 states have call successors, (0), 0 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 16:26:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 12716 transitions. [2021-07-09 16:26:21,583 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 12716 transitions. Word has length 225 [2021-07-09 16:26:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:21,583 INFO L482 AbstractCegarLoop]: Abstraction has 4634 states and 12716 transitions. [2021-07-09 16:26:21,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 5.066666666666666) internal successors, (228), 45 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 16:26:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 12716 transitions. [2021-07-09 16:26:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-07-09 16:26:21,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:21,588 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:21,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 16:26:21,788 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1760999479, now seen corresponding path program 37 times [2021-07-09 16:26:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:21,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413544727] [2021-07-09 16:26:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:22,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413544727] [2021-07-09 16:26:22,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413544727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520127384] [2021-07-09 16:26:22,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 16:26:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:22,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520127384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:22,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:22,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-07-09 16:26:22,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886494543] [2021-07-09 16:26:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 16:26:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 16:26:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:26:22,755 INFO L87 Difference]: Start difference. First operand 4634 states and 12716 transitions. Second operand has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 16:26:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:25,209 INFO L93 Difference]: Finished difference Result 9118 states and 24953 transitions. [2021-07-09 16:26:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 16:26:25,209 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 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 230 [2021-07-09 16:26:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:25,220 INFO L225 Difference]: With dead ends: 9118 [2021-07-09 16:26:25,220 INFO L226 Difference]: Without dead ends: 8731 [2021-07-09 16:26:25,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4613 ImplicationChecksByTransitivity, 2500.4ms TimeCoverageRelationStatistics Valid=4871, Invalid=11641, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 16:26:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8731 states. [2021-07-09 16:26:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8731 to 7683. [2021-07-09 16:26:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 2.8407966675344962) internal successors, (21823), 7682 states have internal predecessors, (21823), 0 states have call successors, (0), 0 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 16:26:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 21823 transitions. [2021-07-09 16:26:25,308 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 21823 transitions. Word has length 230 [2021-07-09 16:26:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:25,309 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 21823 transitions. [2021-07-09 16:26:25,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 16:26:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 21823 transitions. [2021-07-09 16:26:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-07-09 16:26:25,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:25,317 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:25,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 16:26:25,518 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:25,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1464455252, now seen corresponding path program 38 times [2021-07-09 16:26:25,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:25,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10875350] [2021-07-09 16:26:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1787 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:26,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10875350] [2021-07-09 16:26:26,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10875350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073505172] [2021-07-09 16:26:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:26,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:26,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:26,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 16:26:26,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1883 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:26,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073505172] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:26:26,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:26:26,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2021-07-09 16:26:26,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462398668] [2021-07-09 16:26:26,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 16:26:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 16:26:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:26:26,487 INFO L87 Difference]: Start difference. First operand 7683 states and 21823 transitions. Second operand has 43 states, 43 states have (on average 5.465116279069767) internal successors, (235), 43 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 16:26:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:27,506 INFO L93 Difference]: Finished difference Result 72636 states and 205753 transitions. [2021-07-09 16:26:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 16:26:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.465116279069767) internal successors, (235), 43 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-07-09 16:26:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:27,513 INFO L225 Difference]: With dead ends: 72636 [2021-07-09 16:26:27,513 INFO L226 Difference]: Without dead ends: 3529 [2021-07-09 16:26:27,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 978.3ms TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 16:26:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2021-07-09 16:26:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 3529. [2021-07-09 16:26:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.564625850340136) internal successors, (9048), 3528 states have internal predecessors, (9048), 0 states have call successors, (0), 0 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 16:26:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 9048 transitions. [2021-07-09 16:26:27,633 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 9048 transitions. Word has length 235 [2021-07-09 16:26:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:27,633 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 9048 transitions. [2021-07-09 16:26:27,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 5.465116279069767) internal successors, (235), 43 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 16:26:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 9048 transitions. [2021-07-09 16:26:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-07-09 16:26:27,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:27,637 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:27,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:27,838 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1709938027, now seen corresponding path program 39 times [2021-07-09 16:26:27,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:27,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075781190] [2021-07-09 16:26:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1806 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:28,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075781190] [2021-07-09 16:26:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075781190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883870021] [2021-07-09 16:26:28,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:28,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-07-09 16:26:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 16:26:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1883 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:28,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883870021] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:26:28,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:26:28,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2021-07-09 16:26:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398218679] [2021-07-09 16:26:28,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 16:26:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 16:26:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:26:28,850 INFO L87 Difference]: Start difference. First operand 3529 states and 9048 transitions. Second operand has 43 states, 43 states have (on average 5.465116279069767) internal successors, (235), 43 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 16:26:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:29,883 INFO L93 Difference]: Finished difference Result 31313 states and 79345 transitions. [2021-07-09 16:26:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 16:26:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.465116279069767) internal successors, (235), 43 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-07-09 16:26:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:29,883 INFO L225 Difference]: With dead ends: 31313 [2021-07-09 16:26:29,883 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 16:26:29,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 965.1ms TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 16:26:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 16:26:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 16:26:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 16:26:29,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2021-07-09 16:26:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:29,885 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 16:26:29,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 5.465116279069767) internal successors, (235), 43 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 16:26:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 16:26:29,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 16:26:30,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 16:26:30,088 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 16:26:30,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 04:26:30 BasicIcfg [2021-07-09 16:26:30,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 16:26:30,090 INFO L168 Benchmark]: Toolchain (without parser) took 83832.20 ms. Allocated memory was 200.3 MB in the beginning and 1.0 GB in the end (delta: 815.8 MB). Free memory was 163.4 MB in the beginning and 457.0 MB in the end (delta: -293.6 MB). Peak memory consumption was 523.3 MB. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.62 ms. Allocated memory is still 200.3 MB. Free memory was 163.2 MB in the beginning and 173.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.98 ms. Allocated memory is still 200.3 MB. Free memory was 173.5 MB in the beginning and 172.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L168 Benchmark]: Boogie Preprocessor took 13.99 ms. Allocated memory is still 200.3 MB. Free memory was 171.5 MB in the beginning and 170.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L168 Benchmark]: RCFGBuilder took 417.49 ms. Allocated memory is still 200.3 MB. Free memory was 170.4 MB in the beginning and 149.4 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L168 Benchmark]: TraceAbstraction took 82991.39 ms. Allocated memory was 200.3 MB in the beginning and 1.0 GB in the end (delta: 815.8 MB). Free memory was 148.9 MB in the beginning and 457.0 MB in the end (delta: -308.1 MB). Peak memory consumption was 509.3 MB. Max. memory is 8.0 GB. [2021-07-09 16:26:30,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 377.62 ms. Allocated memory is still 200.3 MB. Free memory was 163.2 MB in the beginning and 173.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.98 ms. Allocated memory is still 200.3 MB. Free memory was 173.5 MB in the beginning and 172.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.99 ms. Allocated memory is still 200.3 MB. Free memory was 171.5 MB in the beginning and 170.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 417.49 ms. Allocated memory is still 200.3 MB. Free memory was 170.4 MB in the beginning and 149.4 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82991.39 ms. Allocated memory was 200.3 MB in the beginning and 1.0 GB in the end (delta: 815.8 MB). Free memory was 148.9 MB in the beginning and 457.0 MB in the end (delta: -308.1 MB). Peak memory consumption was 509.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 82900.5ms, OverallIterations: 45, TraceHistogramMax: 21, EmptinessCheckTime: 181.6ms, AutomataDifference: 48739.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 61.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5788 SDtfs, 56673 SDslu, 47472 SDs, 0 SdLazy, 8969 SolverSat, 7269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5860.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8882 GetRequests, 5821 SyntacticMatches, 0 SemanticMatches, 3061 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74740 ImplicationChecksByTransitivity, 46107.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7683occurred in iteration=43, InterpolantAutomatonStates: 2277, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2325.7ms AutomataMinimizationTime, 45 MinimizatonAttempts, 69064 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 614.7ms SsaConstructionTime, 1850.5ms SatisfiabilityAnalysisTime, 18803.8ms InterpolantComputationTime, 11658 NumberOfCodeBlocks, 11658 NumberOfCodeBlocksAsserted, 320 NumberOfCheckSat, 11572 ConstructedInterpolants, 0 QuantifiedInterpolants, 34582 SizeOfPredicates, 942 NumberOfNonLiveVariables, 11176 ConjunctsInSsa, 1141 ConjunctsInUnsatCore, 86 InterpolantComputations, 6 PerfectInterpolantSequences, 7359/54462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...