/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:25:07,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:25:07,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:25:07,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:25:07,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:25:07,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:25:07,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:25:07,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:25:07,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:25:07,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:25:07,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:25:07,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 15:25:07,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 15:25:07,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 15:25:07,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 15:25:07,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 15:25:07,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 15:25:07,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 15:25:07,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 15:25:07,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 15:25:07,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 15:25:07,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 15:25:07,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 15:25:07,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 15:25:07,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 15:25:07,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 15:25:07,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 15:25:07,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 15:25:07,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 15:25:07,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-12 15:25:07,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 15:25:07,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 15:25:07,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 15:25:07,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 15:25:07,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 15:25:07,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 15:25:07,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 15:25:07,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 15:25:07,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:25:07,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:25:07,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:25:07,151 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 [2021-06-12 15:25:07,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:25:07,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:25:07,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:25:07,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:25:07,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:25:07,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:25:07,178 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:25:07,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:25:07,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:25:07,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:25:07,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:25:07,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:25:07,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:25:07,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:25:07,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:25:07,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:25:07,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:25:07,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:25:07,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:25:07,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:25:07,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:25:07,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:25:07,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:25:07,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:25:07,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:25:07,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:25:07,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:25:07,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:25:07,452 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:25:07,453 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:25:07,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-06-12 15:25:07,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508469ef7/d5a54b1a62244fada7c1feb644508f76/FLAGc67b2db18 [2021-06-12 15:25:07,869 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:25:07,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-06-12 15:25:07,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508469ef7/d5a54b1a62244fada7c1feb644508f76/FLAGc67b2db18 [2021-06-12 15:25:08,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508469ef7/d5a54b1a62244fada7c1feb644508f76 [2021-06-12 15:25:08,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:25:08,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:25:08,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:25:08,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:25:08,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:25:08,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c0620e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08, skipping insertion in model container [2021-06-12 15:25:08,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:25:08,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:25:08,587 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-1.i[30950,30963] [2021-06-12 15:25:08,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:25:08,594 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:25:08,627 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-1.i[30950,30963] [2021-06-12 15:25:08,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:25:08,681 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:25:08,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08 WrapperNode [2021-06-12 15:25:08,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:25:08,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:25:08,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:25:08,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:25:08,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:25:08,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:25:08,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:25:08,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:25:08,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (1/1) ... [2021-06-12 15:25:08,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:25:08,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:25:08,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:25:08,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:25:08,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (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 [2021-06-12 15:25:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:25:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:25:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:25:08,799 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:25:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:25:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:25:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:25:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:25:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:25:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:25:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:25:08,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:25:08,802 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:25:09,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:25:09,107 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:25:09,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:25:09 BoogieIcfgContainer [2021-06-12 15:25:09,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:25:09,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:25:09,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:25:09,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:25:09,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:25:08" (1/3) ... [2021-06-12 15:25:09,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6d45af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:25:09, skipping insertion in model container [2021-06-12 15:25:09,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:08" (2/3) ... [2021-06-12 15:25:09,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6d45af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:25:09, skipping insertion in model container [2021-06-12 15:25:09,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:25:09" (3/3) ... [2021-06-12 15:25:09,114 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-06-12 15:25:09,117 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:25:09,118 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:25:09,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:25:09,118 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:25:09,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,147 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,148 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,148 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,148 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,148 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,149 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,149 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,155 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,155 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,155 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,156 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,162 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,163 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,163 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,164 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:09,165 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:25:09,178 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:25:09,196 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:25:09,197 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:25:09,197 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:25:09,197 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:25:09,197 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:25:09,197 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:25:09,197 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:25:09,197 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:25:09,205 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-12 15:25:09,266 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:25:09,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:09,280 INFO L472 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] [2021-06-12 15:25:09,280 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-12 15:25:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:09,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412351479] [2021-06-12 15:25:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:09,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:09,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412351479] [2021-06-12 15:25:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412351479] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:09,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:09,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:09,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513341968] [2021-06-12 15:25:09,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:09,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:09,580 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 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) [2021-06-12 15:25:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:09,790 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-06-12 15:25:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 15:25:09,791 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 [2021-06-12 15:25:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:09,804 INFO L225 Difference]: With dead ends: 3467 [2021-06-12 15:25:09,804 INFO L226 Difference]: Without dead ends: 1242 [2021-06-12 15:25:09,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-12 15:25:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-06-12 15:25:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-06-12 15:25:09,866 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-06-12 15:25:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:09,867 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-06-12 15:25:09,867 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) [2021-06-12 15:25:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-06-12 15:25:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:25:09,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:09,869 INFO L472 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] [2021-06-12 15:25:09,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:25:09,869 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:09,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:09,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2094315683, now seen corresponding path program 1 times [2021-06-12 15:25:09,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:09,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838563271] [2021-06-12 15:25:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:09,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:09,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838563271] [2021-06-12 15:25:09,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838563271] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:09,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:09,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:09,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673097801] [2021-06-12 15:25:09,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:09,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:09,955 INFO L87 Difference]: Start difference. First operand 942 states and 2548 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) [2021-06-12 15:25:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:10,063 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-06-12 15:25:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 15:25:10,064 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 [2021-06-12 15:25:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:10,067 INFO L225 Difference]: With dead ends: 1194 [2021-06-12 15:25:10,067 INFO L226 Difference]: Without dead ends: 942 [2021-06-12 15:25:10,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-12 15:25:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-06-12 15:25:10,080 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) [2021-06-12 15:25:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-12 15:25:10,082 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-06-12 15:25:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:10,083 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-12 15:25:10,083 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) [2021-06-12 15:25:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-12 15:25:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:25:10,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:10,084 INFO L472 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] [2021-06-12 15:25:10,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:25:10,084 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-12 15:25:10,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:10,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775437880] [2021-06-12 15:25:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:10,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:10,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775437880] [2021-06-12 15:25:10,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775437880] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:10,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:10,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:10,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731445505] [2021-06-12 15:25:10,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:10,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:10,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:10,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:10,162 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) [2021-06-12 15:25:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:10,277 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-12 15:25:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:25:10,278 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 [2021-06-12 15:25:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:10,281 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 15:25:10,281 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 15:25:10,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 15:25:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-12 15:25:10,293 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) [2021-06-12 15:25:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-12 15:25:10,295 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-12 15:25:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:10,295 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-12 15:25:10,295 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) [2021-06-12 15:25:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-12 15:25:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:10,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:10,297 INFO L472 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] [2021-06-12 15:25:10,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:25:10,297 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-12 15:25:10,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:10,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889116619] [2021-06-12 15:25:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:10,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889116619] [2021-06-12 15:25:10,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889116619] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:10,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:10,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172517244] [2021-06-12 15:25:10,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:10,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:10,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:10,408 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) [2021-06-12 15:25:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:10,606 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-12 15:25:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:25:10,607 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 [2021-06-12 15:25:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:10,610 INFO L225 Difference]: With dead ends: 1304 [2021-06-12 15:25:10,610 INFO L226 Difference]: Without dead ends: 1044 [2021-06-12 15:25:10,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:10,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-12 15:25:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-12 15:25:10,624 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) [2021-06-12 15:25:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-12 15:25:10,627 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-12 15:25:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:10,627 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-12 15:25:10,627 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) [2021-06-12 15:25:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-12 15:25:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:10,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:10,628 INFO L472 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] [2021-06-12 15:25:10,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:25:10,628 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-12 15:25:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:10,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563577779] [2021-06-12 15:25:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:10,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:10,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563577779] [2021-06-12 15:25:10,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563577779] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:10,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:10,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:25:10,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550480712] [2021-06-12 15:25:10,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:25:10,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:25:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:25:10,721 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2021-06-12 15:25:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:10,813 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-12 15:25:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 [2021-06-12 15:25:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:10,818 INFO L225 Difference]: With dead ends: 1772 [2021-06-12 15:25:10,818 INFO L226 Difference]: Without dead ends: 1505 [2021-06-12 15:25:10,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-12 15:25:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-12 15:25:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-12 15:25:10,837 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-12 15:25:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:10,837 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-12 15:25:10,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2021-06-12 15:25:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-12 15:25:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:10,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:10,838 INFO L472 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] [2021-06-12 15:25:10,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:25:10,838 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-12 15:25:10,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:10,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039198368] [2021-06-12 15:25:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:10,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039198368] [2021-06-12 15:25:10,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039198368] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:10,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:10,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373107692] [2021-06-12 15:25:10,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:10,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:10,911 INFO L87 Difference]: Start difference. First operand 975 states and 2628 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) [2021-06-12 15:25:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,015 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-12 15:25:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:11,017 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 [2021-06-12 15:25:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,024 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 15:25:11,024 INFO L226 Difference]: Without dead ends: 1944 [2021-06-12 15:25:11,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-12 15:25:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-12 15:25:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-12 15:25:11,048 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-12 15:25:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:11,048 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-12 15:25:11,049 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) [2021-06-12 15:25:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-12 15:25:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:11,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:11,050 INFO L472 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] [2021-06-12 15:25:11,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:25:11,050 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-12 15:25:11,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:11,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802540811] [2021-06-12 15:25:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:11,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802540811] [2021-06-12 15:25:11,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802540811] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:11,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:11,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:11,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942074029] [2021-06-12 15:25:11,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:11,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:11,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:11,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:11,103 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 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) [2021-06-12 15:25:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,197 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-12 15:25:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:11,198 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 [2021-06-12 15:25:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,201 INFO L225 Difference]: With dead ends: 1519 [2021-06-12 15:25:11,201 INFO L226 Difference]: Without dead ends: 1138 [2021-06-12 15:25:11,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-12 15:25:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-12 15:25:11,216 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) [2021-06-12 15:25:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-12 15:25:11,218 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-12 15:25:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:11,218 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-12 15:25:11,218 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) [2021-06-12 15:25:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-12 15:25:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:11,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:11,220 INFO L472 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] [2021-06-12 15:25:11,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 15:25:11,220 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-12 15:25:11,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:11,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58952616] [2021-06-12 15:25:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58952616] [2021-06-12 15:25:11,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58952616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528792804] [2021-06-12 15:25:11,290 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 [2021-06-12 15:25:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528792804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:11,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:11,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:11,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718236184] [2021-06-12 15:25:11,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:11,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:11,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:11,561 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:11,666 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-12 15:25:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 15:25:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2021-06-12 15:25:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:11,670 INFO L225 Difference]: With dead ends: 1451 [2021-06-12 15:25:11,670 INFO L226 Difference]: Without dead ends: 1181 [2021-06-12 15:25:11,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-12 15:25:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-12 15:25:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-12 15:25:11,696 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-12 15:25:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:11,697 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-12 15:25:11,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-12 15:25:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:11,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:11,698 INFO L472 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] [2021-06-12 15:25:11,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-12 15:25:11,914 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-12 15:25:11,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:11,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349233013] [2021-06-12 15:25:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:11,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:11,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349233013] [2021-06-12 15:25:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349233013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:11,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196106979] [2021-06-12 15:25:11,978 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 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 [2021-06-12 15:25:12,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196106979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:12,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:12,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 15:25:12,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705243359] [2021-06-12 15:25:12,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:25:12,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:25:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:12,134 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:12,247 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-12 15:25:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:25:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-06-12 15:25:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:12,254 INFO L225 Difference]: With dead ends: 2333 [2021-06-12 15:25:12,255 INFO L226 Difference]: Without dead ends: 2063 [2021-06-12 15:25:12,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-12 15:25:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-12 15:25:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-12 15:25:12,280 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-12 15:25:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:12,280 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-12 15:25:12,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-12 15:25:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:12,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:12,281 INFO L472 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] [2021-06-12 15:25:12,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:12,497 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-12 15:25:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:12,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862938499] [2021-06-12 15:25:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862938499] [2021-06-12 15:25:12,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862938499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519190574] [2021-06-12 15:25:12,551 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 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 [2021-06-12 15:25:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:25:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:12,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519190574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:12,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:12,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:12,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561119938] [2021-06-12 15:25:12,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:12,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:12,696 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:12,900 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-12 15:25:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:12,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2021-06-12 15:25:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:12,906 INFO L225 Difference]: With dead ends: 2121 [2021-06-12 15:25:12,906 INFO L226 Difference]: Without dead ends: 1546 [2021-06-12 15:25:12,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-12 15:25:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-12 15:25:12,926 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) [2021-06-12 15:25:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-12 15:25:12,928 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-12 15:25:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:12,928 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-12 15:25:12,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-12 15:25:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:12,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:12,929 INFO L472 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] [2021-06-12 15:25:13,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 15:25:13,150 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1574579510, now seen corresponding path program 1 times [2021-06-12 15:25:13,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:13,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575655224] [2021-06-12 15:25:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:13,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:13,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575655224] [2021-06-12 15:25:13,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575655224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:13,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580168717] [2021-06-12 15:25:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 15:25:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:13,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580168717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:13,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:13,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:13,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190279626] [2021-06-12 15:25:13,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:13,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:13,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:13,384 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:13,569 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-12 15:25:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:13,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2021-06-12 15:25:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:13,575 INFO L225 Difference]: With dead ends: 2398 [2021-06-12 15:25:13,575 INFO L226 Difference]: Without dead ends: 1926 [2021-06-12 15:25:13,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:25:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-12 15:25:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-12 15:25:13,606 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) [2021-06-12 15:25:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-12 15:25:13,609 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-12 15:25:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:13,609 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-12 15:25:13,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-12 15:25:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:13,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:13,612 INFO L472 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] [2021-06-12 15:25:13,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:13,833 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -767959508, now seen corresponding path program 1 times [2021-06-12 15:25:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:13,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109747911] [2021-06-12 15:25:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:13,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:13,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109747911] [2021-06-12 15:25:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109747911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:13,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364318852] [2021-06-12 15:25:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:14,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364318852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:14,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:14,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:14,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396826420] [2021-06-12 15:25:14,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:14,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:14,077 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:14,217 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-12 15:25:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:14,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:14,222 INFO L225 Difference]: With dead ends: 1866 [2021-06-12 15:25:14,222 INFO L226 Difference]: Without dead ends: 1596 [2021-06-12 15:25:14,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-12 15:25:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-12 15:25:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-12 15:25:14,244 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-12 15:25:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:14,245 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-12 15:25:14,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-12 15:25:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:14,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:14,247 INFO L472 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] [2021-06-12 15:25:14,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 15:25:14,464 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:14,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:14,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 2 times [2021-06-12 15:25:14,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:14,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668191451] [2021-06-12 15:25:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:14,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668191451] [2021-06-12 15:25:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668191451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950631388] [2021-06-12 15:25:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:14,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:14,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:14,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950631388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:14,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:14,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:14,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215207035] [2021-06-12 15:25:14,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:14,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:14,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:14,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:14,733 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:14,874 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-12 15:25:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:14,878 INFO L225 Difference]: With dead ends: 1981 [2021-06-12 15:25:14,878 INFO L226 Difference]: Without dead ends: 1711 [2021-06-12 15:25:14,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-12 15:25:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-12 15:25:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-12 15:25:14,904 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-12 15:25:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:14,904 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-12 15:25:14,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-12 15:25:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:14,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:14,906 INFO L472 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] [2021-06-12 15:25:15,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:15,123 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 3 times [2021-06-12 15:25:15,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:15,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364030117] [2021-06-12 15:25:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:15,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:15,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364030117] [2021-06-12 15:25:15,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364030117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:15,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632726790] [2021-06-12 15:25:15,179 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 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 [2021-06-12 15:25:15,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:25:15,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:15,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:15,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632726790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:15,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:15,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:15,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727379316] [2021-06-12 15:25:15,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:15,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:15,321 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 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) [2021-06-12 15:25:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:15,567 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-12 15:25:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:15,567 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 [2021-06-12 15:25:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:15,571 INFO L225 Difference]: With dead ends: 2669 [2021-06-12 15:25:15,571 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 15:25:15,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:25:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 15:25:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-12 15:25:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-12 15:25:15,603 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-12 15:25:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:15,603 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-12 15:25:15,603 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) [2021-06-12 15:25:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-12 15:25:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:15,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:15,605 INFO L472 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] [2021-06-12 15:25:15,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 15:25:15,826 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 4 times [2021-06-12 15:25:15,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:15,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084986628] [2021-06-12 15:25:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:15,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:15,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084986628] [2021-06-12 15:25:15,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084986628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:15,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942141555] [2021-06-12 15:25:15,879 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 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 [2021-06-12 15:25:15,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:15,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:16,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942141555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:16,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:16,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:16,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673220284] [2021-06-12 15:25:16,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:16,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:16,019 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:16,184 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-12 15:25:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:16,192 INFO L225 Difference]: With dead ends: 2878 [2021-06-12 15:25:16,192 INFO L226 Difference]: Without dead ends: 2608 [2021-06-12 15:25:16,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:25:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-12 15:25:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-12 15:25:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-12 15:25:16,224 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-12 15:25:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:16,224 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-12 15:25:16,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-12 15:25:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:16,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:16,227 INFO L472 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] [2021-06-12 15:25:16,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 15:25:16,451 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 5 times [2021-06-12 15:25:16,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:16,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151958597] [2021-06-12 15:25:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:16,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:16,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151958597] [2021-06-12 15:25:16,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151958597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:16,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480434366] [2021-06-12 15:25:16,512 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 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 [2021-06-12 15:25:16,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:25:16,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:16,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:16,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480434366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:16,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:16,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781422344] [2021-06-12 15:25:16,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:16,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:16,654 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:16,905 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-12 15:25:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:16,908 INFO L225 Difference]: With dead ends: 2821 [2021-06-12 15:25:16,908 INFO L226 Difference]: Without dead ends: 2246 [2021-06-12 15:25:16,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:25:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-12 15:25:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-12 15:25:16,930 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) [2021-06-12 15:25:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-12 15:25:16,932 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-12 15:25:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:16,932 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-12 15:25:16,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-12 15:25:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:16,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:16,934 INFO L472 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] [2021-06-12 15:25:17,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 15:25:17,149 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 978716506, now seen corresponding path program 6 times [2021-06-12 15:25:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:17,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63384608] [2021-06-12 15:25:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:17,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:17,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63384608] [2021-06-12 15:25:17,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63384608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465860068] [2021-06-12 15:25:17,206 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 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 [2021-06-12 15:25:17,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 15:25:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:17,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465860068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:17,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 15:25:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943378953] [2021-06-12 15:25:17,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:17,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:17,366 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:17,496 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-12 15:25:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:17,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:17,524 INFO L225 Difference]: With dead ends: 2561 [2021-06-12 15:25:17,524 INFO L226 Difference]: Without dead ends: 2212 [2021-06-12 15:25:17,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-12 15:25:17,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-12 15:25:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-12 15:25:17,547 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-12 15:25:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:17,547 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-12 15:25:17,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-12 15:25:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:17,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:17,549 INFO L472 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] [2021-06-12 15:25:17,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 15:25:17,761 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1071233846, now seen corresponding path program 7 times [2021-06-12 15:25:17,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:17,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294069547] [2021-06-12 15:25:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:17,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:17,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294069547] [2021-06-12 15:25:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294069547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379009142] [2021-06-12 15:25:17,808 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 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 [2021-06-12 15:25:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:17,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379009142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:17,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:17,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:25:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004967744] [2021-06-12 15:25:17,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:17,934 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:18,012 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-12 15:25:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 15:25:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:18,016 INFO L225 Difference]: With dead ends: 2311 [2021-06-12 15:25:18,016 INFO L226 Difference]: Without dead ends: 2026 [2021-06-12 15:25:18,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-12 15:25:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-12 15:25:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-12 15:25:18,042 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-12 15:25:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:18,042 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-12 15:25:18,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-12 15:25:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:18,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:18,044 INFO L472 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] [2021-06-12 15:25:18,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:18,261 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2040122438, now seen corresponding path program 8 times [2021-06-12 15:25:18,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:18,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961540279] [2021-06-12 15:25:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:18,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:18,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961540279] [2021-06-12 15:25:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961540279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:18,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635851811] [2021-06-12 15:25:18,310 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 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 [2021-06-12 15:25:18,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:18,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635851811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:18,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:18,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 15:25:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064016188] [2021-06-12 15:25:18,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:18,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:18,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:18,445 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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) [2021-06-12 15:25:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:18,606 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-12 15:25:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 [2021-06-12 15:25:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:18,609 INFO L225 Difference]: With dead ends: 2246 [2021-06-12 15:25:18,609 INFO L226 Difference]: Without dead ends: 1961 [2021-06-12 15:25:18,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-12 15:25:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-12 15:25:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-12 15:25:18,628 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-12 15:25:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:18,629 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-12 15:25:18,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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) [2021-06-12 15:25:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-12 15:25:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:18,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:18,630 INFO L472 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] [2021-06-12 15:25:18,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:18,845 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1871308552, now seen corresponding path program 9 times [2021-06-12 15:25:18,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:18,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582132745] [2021-06-12 15:25:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:18,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:18,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582132745] [2021-06-12 15:25:18,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582132745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:18,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918081753] [2021-06-12 15:25:18,890 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 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 [2021-06-12 15:25:18,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:25:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918081753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:25:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745529008] [2021-06-12 15:25:19,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:19,018 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:19,136 INFO L93 Difference]: Finished difference Result 3193 states and 8511 transitions. [2021-06-12 15:25:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:19,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:19,141 INFO L225 Difference]: With dead ends: 3193 [2021-06-12 15:25:19,141 INFO L226 Difference]: Without dead ends: 2893 [2021-06-12 15:25:19,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:25:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-12 15:25:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1853. [2021-06-12 15:25:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.8115550755939527) internal successors, (5207), 1852 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 5207 transitions. [2021-06-12 15:25:19,171 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 5207 transitions. Word has length 55 [2021-06-12 15:25:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:19,172 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 5207 transitions. [2021-06-12 15:25:19,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 5207 transitions. [2021-06-12 15:25:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:19,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:19,173 INFO L472 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] [2021-06-12 15:25:19,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 15:25:19,389 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -809510425, now seen corresponding path program 10 times [2021-06-12 15:25:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:19,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900475981] [2021-06-12 15:25:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:19,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:19,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900475981] [2021-06-12 15:25:19,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900475981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:19,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936444581] [2021-06-12 15:25:19,443 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 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 [2021-06-12 15:25:19,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:19,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:19,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936444581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:19,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:19,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:19,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663645248] [2021-06-12 15:25:19,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:19,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:19,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:19,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:19,593 INFO L87 Difference]: Start difference. First operand 1853 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:19,785 INFO L93 Difference]: Finished difference Result 3208 states and 8677 transitions. [2021-06-12 15:25:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:19,789 INFO L225 Difference]: With dead ends: 3208 [2021-06-12 15:25:19,789 INFO L226 Difference]: Without dead ends: 2426 [2021-06-12 15:25:19,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:25:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-12 15:25:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1856. [2021-06-12 15:25:19,809 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) [2021-06-12 15:25:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-12 15:25:19,811 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-12 15:25:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:19,812 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-12 15:25:19,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-12 15:25:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:19,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:19,814 INFO L472 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] [2021-06-12 15:25:20,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:20,029 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:20,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1514387363, now seen corresponding path program 11 times [2021-06-12 15:25:20,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:20,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497323697] [2021-06-12 15:25:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:20,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497323697] [2021-06-12 15:25:20,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497323697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797335750] [2021-06-12 15:25:20,121 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 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 [2021-06-12 15:25:20,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:20,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:20,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:20,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:20,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797335750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:20,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:20,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611438893] [2021-06-12 15:25:20,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:20,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:20,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:20,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:20,279 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:20,453 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-12 15:25:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:20,456 INFO L225 Difference]: With dead ends: 2316 [2021-06-12 15:25:20,456 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 15:25:20,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 15:25:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-12 15:25:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:20,477 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:20,477 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:20,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:20,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:20,480 INFO L472 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] [2021-06-12 15:25:20,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 15:25:20,693 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 12 times [2021-06-12 15:25:20,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:20,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639045912] [2021-06-12 15:25:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:20,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:20,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639045912] [2021-06-12 15:25:20,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639045912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475719873] [2021-06-12 15:25:20,770 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 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 [2021-06-12 15:25:20,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:20,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:20,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475719873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:20,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:20,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:20,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363408162] [2021-06-12 15:25:20,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:20,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:20,915 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:21,101 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-12 15:25:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:21,104 INFO L225 Difference]: With dead ends: 2481 [2021-06-12 15:25:21,104 INFO L226 Difference]: Without dead ends: 2211 [2021-06-12 15:25:21,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-12 15:25:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-12 15:25:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:21,129 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:21,129 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:21,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:21,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:21,131 INFO L472 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] [2021-06-12 15:25:21,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:21,347 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:21,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 13 times [2021-06-12 15:25:21,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:21,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341721878] [2021-06-12 15:25:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:21,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341721878] [2021-06-12 15:25:21,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341721878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500768343] [2021-06-12 15:25:21,448 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 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 [2021-06-12 15:25:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500768343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:21,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:21,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:21,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831579305] [2021-06-12 15:25:21,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:21,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:21,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:21,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:21,613 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 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) [2021-06-12 15:25:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:21,814 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-12 15:25:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:21,815 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 [2021-06-12 15:25:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:21,818 INFO L225 Difference]: With dead ends: 2566 [2021-06-12 15:25:21,818 INFO L226 Difference]: Without dead ends: 2296 [2021-06-12 15:25:21,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-12 15:25:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-12 15:25:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:21,841 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:21,841 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:21,841 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) [2021-06-12 15:25:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:21,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:21,843 INFO L472 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] [2021-06-12 15:25:22,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 15:25:22,060 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 14 times [2021-06-12 15:25:22,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:22,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268118816] [2021-06-12 15:25:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:22,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268118816] [2021-06-12 15:25:22,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268118816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181747357] [2021-06-12 15:25:22,126 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 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 [2021-06-12 15:25:22,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:22,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:22,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181747357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:22,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:22,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957248480] [2021-06-12 15:25:22,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:22,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:22,286 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:22,476 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-12 15:25:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:25:22,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:22,480 INFO L225 Difference]: With dead ends: 2496 [2021-06-12 15:25:22,480 INFO L226 Difference]: Without dead ends: 2226 [2021-06-12 15:25:22,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-12 15:25:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-12 15:25:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-12 15:25:22,507 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-12 15:25:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:22,507 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-12 15:25:22,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-12 15:25:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:22,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:22,510 INFO L472 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] [2021-06-12 15:25:22,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:25:22,725 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 15 times [2021-06-12 15:25:22,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:22,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210930557] [2021-06-12 15:25:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:22,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210930557] [2021-06-12 15:25:22,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210930557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52681881] [2021-06-12 15:25:22,793 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 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 [2021-06-12 15:25:22,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:25:22,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:22,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52681881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:22,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:22,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:22,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147298800] [2021-06-12 15:25:22,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:22,951 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 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) [2021-06-12 15:25:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:23,276 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-12 15:25:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:23,276 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 [2021-06-12 15:25:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:23,278 INFO L225 Difference]: With dead ends: 3074 [2021-06-12 15:25:23,278 INFO L226 Difference]: Without dead ends: 2451 [2021-06-12 15:25:23,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-12 15:25:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-12 15:25:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-12 15:25:23,304 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-12 15:25:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:23,304 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-12 15:25:23,305 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) [2021-06-12 15:25:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-12 15:25:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:23,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:23,307 INFO L472 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] [2021-06-12 15:25:23,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 15:25:23,523 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 16 times [2021-06-12 15:25:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:23,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933514869] [2021-06-12 15:25:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:23,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:23,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933514869] [2021-06-12 15:25:23,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933514869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:23,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404015785] [2021-06-12 15:25:23,590 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 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 [2021-06-12 15:25:23,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:23,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404015785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:23,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052979472] [2021-06-12 15:25:23,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:23,733 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:23,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:23,952 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-12 15:25:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:23,955 INFO L225 Difference]: With dead ends: 3278 [2021-06-12 15:25:23,955 INFO L226 Difference]: Without dead ends: 3008 [2021-06-12 15:25:23,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:25:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-12 15:25:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-12 15:25:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-12 15:25:23,983 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-12 15:25:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:23,983 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-12 15:25:23,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-12 15:25:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:23,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:23,985 INFO L472 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] [2021-06-12 15:25:24,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 15:25:24,201 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 17 times [2021-06-12 15:25:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:24,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375263211] [2021-06-12 15:25:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:24,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:24,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375263211] [2021-06-12 15:25:24,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375263211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:24,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967087017] [2021-06-12 15:25:24,259 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 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 [2021-06-12 15:25:24,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:24,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:24,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967087017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:24,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:24,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:25:24,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742448200] [2021-06-12 15:25:24,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:24,431 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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) [2021-06-12 15:25:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:24,757 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-12 15:25:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 [2021-06-12 15:25:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:24,763 INFO L225 Difference]: With dead ends: 3221 [2021-06-12 15:25:24,763 INFO L226 Difference]: Without dead ends: 2646 [2021-06-12 15:25:24,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:25:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-12 15:25:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-12 15:25:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-12 15:25:24,787 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-12 15:25:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:24,787 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-12 15:25:24,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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) [2021-06-12 15:25:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-12 15:25:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:24,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:24,789 INFO L472 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] [2021-06-12 15:25:25,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:25,005 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1366107511, now seen corresponding path program 18 times [2021-06-12 15:25:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:25,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548799415] [2021-06-12 15:25:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:25,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548799415] [2021-06-12 15:25:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548799415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819003256] [2021-06-12 15:25:25,079 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 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 [2021-06-12 15:25:25,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:25,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819003256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:25,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:25,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-12 15:25:25,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314946836] [2021-06-12 15:25:25,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:25,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:25,241 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:25,434 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-12 15:25:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:25,437 INFO L225 Difference]: With dead ends: 3061 [2021-06-12 15:25:25,437 INFO L226 Difference]: Without dead ends: 2712 [2021-06-12 15:25:25,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:25:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-12 15:25:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-12 15:25:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-12 15:25:25,459 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-12 15:25:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:25,459 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-12 15:25:25,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-12 15:25:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:25,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:25,461 INFO L472 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] [2021-06-12 15:25:25,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:25,669 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -908301467, now seen corresponding path program 19 times [2021-06-12 15:25:25,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:25,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041914182] [2021-06-12 15:25:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041914182] [2021-06-12 15:25:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041914182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370489238] [2021-06-12 15:25:25,734 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 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 [2021-06-12 15:25:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:25,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:25,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370489238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:25,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:25,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:25,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25210321] [2021-06-12 15:25:25,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:25,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:25,875 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:25,991 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-12 15:25:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:25:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:25,993 INFO L225 Difference]: With dead ends: 2861 [2021-06-12 15:25:25,993 INFO L226 Difference]: Without dead ends: 2576 [2021-06-12 15:25:25,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-12 15:25:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-12 15:25:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-12 15:25:26,015 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-12 15:25:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:26,015 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-12 15:25:26,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-12 15:25:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:26,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:26,017 INFO L472 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] [2021-06-12 15:25:26,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 15:25:26,233 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1371957365, now seen corresponding path program 20 times [2021-06-12 15:25:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:26,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070979809] [2021-06-12 15:25:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:26,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:26,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070979809] [2021-06-12 15:25:26,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070979809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:26,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746701386] [2021-06-12 15:25:26,307 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 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 [2021-06-12 15:25:26,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:26,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746701386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:26,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:26,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:25:26,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784109005] [2021-06-12 15:25:26,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:26,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:26,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:26,468 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-12 15:25:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:26,655 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-12 15:25:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 [2021-06-12 15:25:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:26,657 INFO L225 Difference]: With dead ends: 2796 [2021-06-12 15:25:26,657 INFO L226 Difference]: Without dead ends: 2511 [2021-06-12 15:25:26,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-12 15:25:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-12 15:25:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-12 15:25:26,681 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-12 15:25:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:26,681 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-12 15:25:26,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-12 15:25:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-12 15:25:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:26,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:26,683 INFO L472 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] [2021-06-12 15:25:26,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:26,886 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash -239599961, now seen corresponding path program 21 times [2021-06-12 15:25:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:26,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891022316] [2021-06-12 15:25:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:26,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:26,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891022316] [2021-06-12 15:25:26,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891022316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:26,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327622159] [2021-06-12 15:25:26,959 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 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 [2021-06-12 15:25:27,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:25:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327622159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:27,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:27,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353969829] [2021-06-12 15:25:27,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:27,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:27,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:27,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:27,098 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:27,241 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-12 15:25:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:27,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:27,244 INFO L225 Difference]: With dead ends: 2721 [2021-06-12 15:25:27,244 INFO L226 Difference]: Without dead ends: 2436 [2021-06-12 15:25:27,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-12 15:25:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-12 15:25:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-12 15:25:27,265 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-12 15:25:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:27,265 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-12 15:25:27,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-12 15:25:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:27,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:27,267 INFO L472 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] [2021-06-12 15:25:27,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 15:25:27,480 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash 729288631, now seen corresponding path program 22 times [2021-06-12 15:25:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:27,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144307409] [2021-06-12 15:25:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:27,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144307409] [2021-06-12 15:25:27,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144307409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078094900] [2021-06-12 15:25:27,537 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 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 [2021-06-12 15:25:27,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:27,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078094900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:27,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:27,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:25:27,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510460247] [2021-06-12 15:25:27,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:27,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:27,685 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-12 15:25:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:27,905 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-12 15:25:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 [2021-06-12 15:25:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:27,908 INFO L225 Difference]: With dead ends: 2646 [2021-06-12 15:25:27,908 INFO L226 Difference]: Without dead ends: 2361 [2021-06-12 15:25:27,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:25:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-12 15:25:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-12 15:25:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-12 15:25:27,927 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-12 15:25:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:27,927 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-12 15:25:27,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-12 15:25:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-12 15:25:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:27,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:27,929 INFO L472 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] [2021-06-12 15:25:28,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 15:25:28,130 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1112824937, now seen corresponding path program 23 times [2021-06-12 15:25:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:28,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924780485] [2021-06-12 15:25:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:28,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:28,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924780485] [2021-06-12 15:25:28,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924780485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:28,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561345486] [2021-06-12 15:25:28,189 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 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 [2021-06-12 15:25:28,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:28,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:28,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 15:25:28,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561345486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:28,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217027746] [2021-06-12 15:25:28,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:28,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:28,326 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:28,491 INFO L93 Difference]: Finished difference Result 3593 states and 9611 transitions. [2021-06-12 15:25:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:28,494 INFO L225 Difference]: With dead ends: 3593 [2021-06-12 15:25:28,494 INFO L226 Difference]: Without dead ends: 3293 [2021-06-12 15:25:28,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-06-12 15:25:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 2203. [2021-06-12 15:25:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.818801089918256) internal successors, (6207), 2202 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6207 transitions. [2021-06-12 15:25:28,520 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6207 transitions. Word has length 65 [2021-06-12 15:25:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:28,520 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6207 transitions. [2021-06-12 15:25:28,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6207 transitions. [2021-06-12 15:25:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:25:28,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:28,522 INFO L472 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] [2021-06-12 15:25:28,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 15:25:28,725 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2120344232, now seen corresponding path program 24 times [2021-06-12 15:25:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840831146] [2021-06-12 15:25:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:28,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840831146] [2021-06-12 15:25:28,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840831146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062755212] [2021-06-12 15:25:28,786 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 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 [2021-06-12 15:25:28,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062755212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:28,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:28,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:25:28,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179024866] [2021-06-12 15:25:28,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:28,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:28,926 INFO L87 Difference]: Start difference. First operand 2203 states and 6207 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:29,167 INFO L93 Difference]: Finished difference Result 2975 states and 8086 transitions. [2021-06-12 15:25:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 15:25:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:29,170 INFO L225 Difference]: With dead ends: 2975 [2021-06-12 15:25:29,170 INFO L226 Difference]: Without dead ends: 2396 [2021-06-12 15:25:29,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-12 15:25:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2028. [2021-06-12 15:25:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-06-12 15:25:29,189 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-06-12 15:25:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:29,189 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-06-12 15:25:29,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-06-12 15:25:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:29,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:29,191 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:29,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 15:25:29,392 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 25 times [2021-06-12 15:25:29,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:29,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709518963] [2021-06-12 15:25:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:29,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:29,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709518963] [2021-06-12 15:25:29,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709518963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:29,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554293895] [2021-06-12 15:25:29,478 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 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 [2021-06-12 15:25:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:29,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:29,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554293895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:29,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:29,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-12 15:25:29,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730405214] [2021-06-12 15:25:29,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:25:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:25:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:29,654 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:29,849 INFO L93 Difference]: Finished difference Result 2868 states and 7683 transitions. [2021-06-12 15:25:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 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 70 [2021-06-12 15:25:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:29,852 INFO L225 Difference]: With dead ends: 2868 [2021-06-12 15:25:29,852 INFO L226 Difference]: Without dead ends: 2534 [2021-06-12 15:25:29,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:25:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-12 15:25:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-06-12 15:25:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7713068181818183) internal successors, (5853), 2112 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-06-12 15:25:29,873 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-06-12 15:25:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:29,873 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-06-12 15:25:29,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-06-12 15:25:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:29,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:29,875 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:30,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 15:25:30,091 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 26 times [2021-06-12 15:25:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:30,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822405669] [2021-06-12 15:25:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:30,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:30,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822405669] [2021-06-12 15:25:30,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822405669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:30,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734425607] [2021-06-12 15:25:30,168 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 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 [2021-06-12 15:25:30,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:30,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734425607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:30,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:30,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:30,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517484084] [2021-06-12 15:25:30,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:30,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:30,333 INFO L87 Difference]: Start difference. First operand 2113 states and 5853 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:30,469 INFO L93 Difference]: Finished difference Result 3061 states and 7877 transitions. [2021-06-12 15:25:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:30,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:30,472 INFO L225 Difference]: With dead ends: 3061 [2021-06-12 15:25:30,472 INFO L226 Difference]: Without dead ends: 2791 [2021-06-12 15:25:30,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-12 15:25:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-06-12 15:25:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-12 15:25:30,494 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-12 15:25:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:30,494 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-12 15:25:30,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-12 15:25:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:30,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:30,496 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:30,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:30,698 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 27 times [2021-06-12 15:25:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822485978] [2021-06-12 15:25:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:30,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822485978] [2021-06-12 15:25:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822485978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718608954] [2021-06-12 15:25:30,789 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 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 [2021-06-12 15:25:30,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:25:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:30,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:30,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718608954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:30,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:30,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:25:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330300166] [2021-06-12 15:25:30,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:30,954 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:31,151 INFO L93 Difference]: Finished difference Result 2946 states and 7647 transitions. [2021-06-12 15:25:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:31,153 INFO L225 Difference]: With dead ends: 2946 [2021-06-12 15:25:31,154 INFO L226 Difference]: Without dead ends: 2676 [2021-06-12 15:25:31,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:25:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-12 15:25:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-06-12 15:25:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-12 15:25:31,174 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-12 15:25:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:31,175 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-12 15:25:31,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-12 15:25:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:31,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:31,177 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:31,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:31,385 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 28 times [2021-06-12 15:25:31,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:31,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747726960] [2021-06-12 15:25:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:31,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:31,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747726960] [2021-06-12 15:25:31,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747726960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:31,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197624875] [2021-06-12 15:25:31,463 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 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 [2021-06-12 15:25:31,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:31,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:31,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197624875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:31,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:31,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79806542] [2021-06-12 15:25:31,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:31,625 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:31,794 INFO L93 Difference]: Finished difference Result 2921 states and 7597 transitions. [2021-06-12 15:25:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:31,796 INFO L225 Difference]: With dead ends: 2921 [2021-06-12 15:25:31,797 INFO L226 Difference]: Without dead ends: 2651 [2021-06-12 15:25:31,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:25:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-12 15:25:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-06-12 15:25:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-12 15:25:31,817 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-12 15:25:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:31,817 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-12 15:25:31,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-12 15:25:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:31,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:31,819 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:32,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 15:25:32,019 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 29 times [2021-06-12 15:25:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347367614] [2021-06-12 15:25:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:32,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347367614] [2021-06-12 15:25:32,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347367614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414598568] [2021-06-12 15:25:32,100 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 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 [2021-06-12 15:25:32,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:25:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414598568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:32,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:25:32,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041115347] [2021-06-12 15:25:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:32,259 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:32,526 INFO L93 Difference]: Finished difference Result 2871 states and 7497 transitions. [2021-06-12 15:25:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:25:32,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:32,529 INFO L225 Difference]: With dead ends: 2871 [2021-06-12 15:25:32,529 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 15:25:32,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:25:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 15:25:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-06-12 15:25:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-12 15:25:32,548 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-12 15:25:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:32,549 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-12 15:25:32,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-12 15:25:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:32,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:32,551 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:32,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:32,766 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 30 times [2021-06-12 15:25:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:32,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437376946] [2021-06-12 15:25:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437376946] [2021-06-12 15:25:32,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437376946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392003902] [2021-06-12 15:25:32,837 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 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 [2021-06-12 15:25:32,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:25:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:32,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392003902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:32,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:32,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:32,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380234834] [2021-06-12 15:25:32,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:32,980 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:33,172 INFO L93 Difference]: Finished difference Result 2821 states and 7397 transitions. [2021-06-12 15:25:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:25:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:33,175 INFO L225 Difference]: With dead ends: 2821 [2021-06-12 15:25:33,175 INFO L226 Difference]: Without dead ends: 2551 [2021-06-12 15:25:33,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:25:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-06-12 15:25:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-06-12 15:25:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-06-12 15:25:33,194 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-06-12 15:25:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:33,194 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-06-12 15:25:33,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-06-12 15:25:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:33,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:33,196 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:33,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 15:25:33,409 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 31 times [2021-06-12 15:25:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:33,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234213401] [2021-06-12 15:25:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:33,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:33,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234213401] [2021-06-12 15:25:33,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234213401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:33,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434534355] [2021-06-12 15:25:33,482 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 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 [2021-06-12 15:25:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:33,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434534355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:33,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:33,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:25:33,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738047810] [2021-06-12 15:25:33,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:33,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:33,640 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:33,926 INFO L93 Difference]: Finished difference Result 2831 states and 7447 transitions. [2021-06-12 15:25:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:33,928 INFO L225 Difference]: With dead ends: 2831 [2021-06-12 15:25:33,928 INFO L226 Difference]: Without dead ends: 2561 [2021-06-12 15:25:33,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:25:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-12 15:25:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-06-12 15:25:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-12 15:25:33,948 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-12 15:25:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:33,948 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-12 15:25:33,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-12 15:25:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:33,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:33,950 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:34,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:34,150 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 32 times [2021-06-12 15:25:34,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:34,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435965670] [2021-06-12 15:25:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:34,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:34,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435965670] [2021-06-12 15:25:34,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435965670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:34,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237274438] [2021-06-12 15:25:34,223 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 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 [2021-06-12 15:25:34,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:34,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237274438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:34,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:34,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:25:34,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934414204] [2021-06-12 15:25:34,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:25:34,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:25:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:34,359 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:34,581 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-12 15:25:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:25:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:34,584 INFO L225 Difference]: With dead ends: 3598 [2021-06-12 15:25:34,584 INFO L226 Difference]: Without dead ends: 3328 [2021-06-12 15:25:34,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:25:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-12 15:25:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-12 15:25:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-12 15:25:34,608 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-12 15:25:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:34,608 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-12 15:25:34,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-12 15:25:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:25:34,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:34,610 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:34,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 15:25:34,810 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 33 times [2021-06-12 15:25:34,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:34,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563059272] [2021-06-12 15:25:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:34,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:34,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563059272] [2021-06-12 15:25:34,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563059272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:34,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174036121] [2021-06-12 15:25:34,875 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 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 [2021-06-12 15:25:34,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:25:34,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:25:34,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:35,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174036121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:35,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:35,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:25:35,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528222644] [2021-06-12 15:25:35,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:35,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:35,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:35,030 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:35,387 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-12 15:25:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:25:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 70 [2021-06-12 15:25:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:35,390 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:25:35,390 INFO L226 Difference]: Without dead ends: 2846 [2021-06-12 15:25:35,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:25:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-12 15:25:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-12 15:25:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-12 15:25:35,411 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-12 15:25:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:35,411 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-12 15:25:35,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-12 15:25:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:35,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:35,412 INFO L472 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] [2021-06-12 15:25:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 15:25:35,629 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 34 times [2021-06-12 15:25:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810593640] [2021-06-12 15:25:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:35,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:35,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810593640] [2021-06-12 15:25:35,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810593640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:35,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458931852] [2021-06-12 15:25:35,709 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 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 [2021-06-12 15:25:35,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:35,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458931852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:35,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:35,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:35,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011306407] [2021-06-12 15:25:35,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:35,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:35,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:35,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:35,854 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:36,051 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-12 15:25:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:25:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:36,053 INFO L225 Difference]: With dead ends: 2621 [2021-06-12 15:25:36,053 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 15:25:36,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:25:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 15:25:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-12 15:25:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-12 15:25:36,072 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-12 15:25:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:36,072 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-12 15:25:36,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-12 15:25:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:36,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:36,074 INFO L472 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] [2021-06-12 15:25:36,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 15:25:36,274 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 35 times [2021-06-12 15:25:36,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:36,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945127632] [2021-06-12 15:25:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:36,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:36,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945127632] [2021-06-12 15:25:36,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945127632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:36,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648540129] [2021-06-12 15:25:36,358 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 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 [2021-06-12 15:25:36,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:25:36,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:36,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:36,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:36,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648540129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:36,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:36,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:25:36,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54327478] [2021-06-12 15:25:36,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:36,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:36,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:36,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:36,531 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:36,757 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-12 15:25:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:25:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:36,760 INFO L225 Difference]: With dead ends: 2841 [2021-06-12 15:25:36,760 INFO L226 Difference]: Without dead ends: 2571 [2021-06-12 15:25:36,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-12 15:25:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-12 15:25:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-12 15:25:36,780 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-12 15:25:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:36,780 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-12 15:25:36,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-12 15:25:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:36,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:36,782 INFO L472 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] [2021-06-12 15:25:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 15:25:36,984 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 36 times [2021-06-12 15:25:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925983411] [2021-06-12 15:25:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:37,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925983411] [2021-06-12 15:25:37,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925983411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994576559] [2021-06-12 15:25:37,059 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 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 [2021-06-12 15:25:37,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:25:37,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994576559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:37,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:37,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309618205] [2021-06-12 15:25:37,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:37,212 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:37,429 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-12 15:25:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:37,432 INFO L225 Difference]: With dead ends: 2871 [2021-06-12 15:25:37,432 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 15:25:37,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 15:25:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-12 15:25:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-12 15:25:37,453 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-12 15:25:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:37,453 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-12 15:25:37,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-12 15:25:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:37,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:37,455 INFO L472 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] [2021-06-12 15:25:37,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:37,656 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 37 times [2021-06-12 15:25:37,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:37,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082290444] [2021-06-12 15:25:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:37,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:37,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082290444] [2021-06-12 15:25:37,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082290444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:37,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289639433] [2021-06-12 15:25:37,739 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 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 [2021-06-12 15:25:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:37,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:37,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:37,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289639433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:37,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:37,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:25:37,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573567328] [2021-06-12 15:25:37,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:37,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:37,931 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:38,204 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-12 15:25:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:38,207 INFO L225 Difference]: With dead ends: 2896 [2021-06-12 15:25:38,207 INFO L226 Difference]: Without dead ends: 2626 [2021-06-12 15:25:38,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:25:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-12 15:25:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-12 15:25:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-12 15:25:38,229 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-12 15:25:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:38,229 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-12 15:25:38,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-12 15:25:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:38,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:38,231 INFO L472 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] [2021-06-12 15:25:38,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:38,445 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 38 times [2021-06-12 15:25:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:38,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389962462] [2021-06-12 15:25:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:38,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389962462] [2021-06-12 15:25:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389962462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051175730] [2021-06-12 15:25:38,532 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:38,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051175730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:38,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:38,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:38,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297128109] [2021-06-12 15:25:38,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:38,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:38,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:38,671 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:38,901 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-12 15:25:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:25:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:38,903 INFO L225 Difference]: With dead ends: 2966 [2021-06-12 15:25:38,903 INFO L226 Difference]: Without dead ends: 2696 [2021-06-12 15:25:38,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:25:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-12 15:25:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-12 15:25:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-12 15:25:38,926 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-12 15:25:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:38,926 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-12 15:25:38,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-12 15:25:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:38,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:38,928 INFO L472 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] [2021-06-12 15:25:39,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:39,129 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 39 times [2021-06-12 15:25:39,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:39,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781751596] [2021-06-12 15:25:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:39,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781751596] [2021-06-12 15:25:39,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781751596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975296116] [2021-06-12 15:25:39,208 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:39,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:25:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975296116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:39,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-12 15:25:39,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237174919] [2021-06-12 15:25:39,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:39,363 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:39,726 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-12 15:25:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:25:39,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:39,729 INFO L225 Difference]: With dead ends: 3544 [2021-06-12 15:25:39,729 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 15:25:39,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:25:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 15:25:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-12 15:25:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-12 15:25:39,750 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-12 15:25:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:39,751 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-12 15:25:39,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-12 15:25:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:39,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:39,752 INFO L472 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] [2021-06-12 15:25:39,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:39,953 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 40 times [2021-06-12 15:25:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:39,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186730409] [2021-06-12 15:25:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:40,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:40,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186730409] [2021-06-12 15:25:40,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186730409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646434606] [2021-06-12 15:25:40,025 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:40,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646434606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:40,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:40,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875899692] [2021-06-12 15:25:40,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:40,163 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:40,449 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-12 15:25:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:40,454 INFO L225 Difference]: With dead ends: 3748 [2021-06-12 15:25:40,454 INFO L226 Difference]: Without dead ends: 3478 [2021-06-12 15:25:40,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:25:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-12 15:25:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-12 15:25:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-12 15:25:40,481 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-12 15:25:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:40,481 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-12 15:25:40,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-12 15:25:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:25:40,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:40,484 INFO L472 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] [2021-06-12 15:25:40,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 15:25:40,700 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 41 times [2021-06-12 15:25:40,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:40,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242078557] [2021-06-12 15:25:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:40,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:40,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242078557] [2021-06-12 15:25:40,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242078557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017469369] [2021-06-12 15:25:40,802 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:40,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:25:40,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:25:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017469369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:40,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:40,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:25:40,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116626135] [2021-06-12 15:25:40,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:40,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:40,938 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:41,271 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-12 15:25:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-12 15:25:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:41,273 INFO L225 Difference]: With dead ends: 3210 [2021-06-12 15:25:41,273 INFO L226 Difference]: Without dead ends: 2721 [2021-06-12 15:25:41,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:25:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-12 15:25:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-12 15:25:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-12 15:25:41,295 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-12 15:25:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:41,295 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-12 15:25:41,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-12 15:25:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:41,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:41,297 INFO L472 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] [2021-06-12 15:25:41,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:41,498 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 42 times [2021-06-12 15:25:41,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:41,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653025480] [2021-06-12 15:25:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:41,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:41,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653025480] [2021-06-12 15:25:41,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653025480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:41,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906627210] [2021-06-12 15:25:41,599 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:41,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:25:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:25:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:41,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906627210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:41,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:41,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:25:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789277557] [2021-06-12 15:25:41,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:25:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:25:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:25:41,771 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:41,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:41,986 INFO L93 Difference]: Finished difference Result 2948 states and 7951 transitions. [2021-06-12 15:25:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:25:41,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 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 [2021-06-12 15:25:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:41,989 INFO L225 Difference]: With dead ends: 2948 [2021-06-12 15:25:41,989 INFO L226 Difference]: Without dead ends: 2678 [2021-06-12 15:25:41,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-06-12 15:25:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-06-12 15:25:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-12 15:25:42,011 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-12 15:25:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:42,011 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-12 15:25:42,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-12 15:25:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:42,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:42,013 INFO L472 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] [2021-06-12 15:25:42,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 15:25:42,215 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 43 times [2021-06-12 15:25:42,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:42,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667693335] [2021-06-12 15:25:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:42,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667693335] [2021-06-12 15:25:42,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667693335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696260579] [2021-06-12 15:25:42,309 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696260579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:42,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:42,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 15:25:42,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120409090] [2021-06-12 15:25:42,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:42,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:42,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:42,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:42,457 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:42,622 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-12 15:25:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:42,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-06-12 15:25:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:42,625 INFO L225 Difference]: With dead ends: 3561 [2021-06-12 15:25:42,625 INFO L226 Difference]: Without dead ends: 3291 [2021-06-12 15:25:42,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:25:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-12 15:25:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-12 15:25:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:42,648 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:42,648 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:42,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:42,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:42,650 INFO L472 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] [2021-06-12 15:25:42,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:42,855 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:42,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 44 times [2021-06-12 15:25:42,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:42,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387350855] [2021-06-12 15:25:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:42,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:42,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387350855] [2021-06-12 15:25:42,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387350855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:42,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769915192] [2021-06-12 15:25:42,957 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:43,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:43,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:43,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769915192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:43,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:43,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:25:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120813505] [2021-06-12 15:25:43,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:43,140 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:43,385 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-12 15:25:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:25:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:25:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:43,388 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:25:43,388 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:25:43,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:25:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-12 15:25:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:43,413 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:43,413 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:43,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:43,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:43,415 INFO L472 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] [2021-06-12 15:25:43,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 15:25:43,625 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 45 times [2021-06-12 15:25:43,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:43,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120177621] [2021-06-12 15:25:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:43,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:43,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120177621] [2021-06-12 15:25:43,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120177621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:43,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252200421] [2021-06-12 15:25:43,712 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:43,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:25:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:43,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252200421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:43,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:43,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 15:25:43,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144433076] [2021-06-12 15:25:43,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:43,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:43,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:43,867 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:44,071 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-12 15:25:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:25:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-06-12 15:25:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:44,074 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:25:44,074 INFO L226 Difference]: Without dead ends: 3151 [2021-06-12 15:25:44,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:25:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-12 15:25:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-12 15:25:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:44,095 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:44,096 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:44,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:44,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:44,097 INFO L472 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] [2021-06-12 15:25:44,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 15:25:44,309 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 46 times [2021-06-12 15:25:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:44,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360903782] [2021-06-12 15:25:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:44,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360903782] [2021-06-12 15:25:44,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360903782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011895851] [2021-06-12 15:25:44,404 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:44,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011895851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:44,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:44,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:25:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750536314] [2021-06-12 15:25:44,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:44,554 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:44,823 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-12 15:25:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:25:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:25:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:44,826 INFO L225 Difference]: With dead ends: 3371 [2021-06-12 15:25:44,826 INFO L226 Difference]: Without dead ends: 3101 [2021-06-12 15:25:44,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:25:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-12 15:25:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-12 15:25:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:44,849 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:44,849 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:44,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:44,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:44,851 INFO L472 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] [2021-06-12 15:25:45,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 15:25:45,051 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 47 times [2021-06-12 15:25:45,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:45,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744510094] [2021-06-12 15:25:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744510094] [2021-06-12 15:25:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744510094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85636121] [2021-06-12 15:25:45,149 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:45,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:25:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:45,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85636121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:45,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:45,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 15:25:45,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475440028] [2021-06-12 15:25:45,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:45,304 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:45,532 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-12 15:25:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:25:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-06-12 15:25:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:45,535 INFO L225 Difference]: With dead ends: 3321 [2021-06-12 15:25:45,535 INFO L226 Difference]: Without dead ends: 3051 [2021-06-12 15:25:45,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:25:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-12 15:25:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-12 15:25:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:45,558 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:45,558 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:45,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:45,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:45,560 INFO L472 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] [2021-06-12 15:25:45,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:45,760 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 48 times [2021-06-12 15:25:45,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:45,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29435558] [2021-06-12 15:25:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:45,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:45,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29435558] [2021-06-12 15:25:45,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29435558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:45,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861846762] [2021-06-12 15:25:45,848 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:45,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:25:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:45,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861846762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:45,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:45,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:25:45,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089507466] [2021-06-12 15:25:45,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:45,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:45,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:45,996 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:46,334 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-12 15:25:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:25:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:25:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:46,336 INFO L225 Difference]: With dead ends: 3271 [2021-06-12 15:25:46,336 INFO L226 Difference]: Without dead ends: 3001 [2021-06-12 15:25:46,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:25:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-12 15:25:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-12 15:25:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:46,359 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:46,359 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:46,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:46,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:46,361 INFO L472 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] [2021-06-12 15:25:46,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:46,566 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 49 times [2021-06-12 15:25:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188300816] [2021-06-12 15:25:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:46,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:46,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188300816] [2021-06-12 15:25:46,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188300816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:46,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756898378] [2021-06-12 15:25:46,639 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:46,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756898378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:46,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:46,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 15:25:46,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750068322] [2021-06-12 15:25:46,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:46,789 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:47,071 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-12 15:25:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:25:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-06-12 15:25:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:47,074 INFO L225 Difference]: With dead ends: 3221 [2021-06-12 15:25:47,074 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 15:25:47,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:25:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 15:25:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-12 15:25:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:25:47,096 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:25:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:47,096 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:25:47,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:25:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:47,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:47,098 INFO L472 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] [2021-06-12 15:25:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 15:25:47,299 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:47,299 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 50 times [2021-06-12 15:25:47,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:47,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220707436] [2021-06-12 15:25:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:47,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:47,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220707436] [2021-06-12 15:25:47,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220707436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:47,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733124721] [2021-06-12 15:25:47,391 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:47,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:47,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:47,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733124721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:47,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:47,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:25:47,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744976857] [2021-06-12 15:25:47,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:47,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:47,555 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:47,943 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-12 15:25:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:25:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:25:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:47,946 INFO L225 Difference]: With dead ends: 3679 [2021-06-12 15:25:47,946 INFO L226 Difference]: Without dead ends: 3056 [2021-06-12 15:25:47,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:25:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-12 15:25:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-12 15:25:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-12 15:25:47,972 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-12 15:25:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:47,972 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-12 15:25:47,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-12 15:25:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:47,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:47,974 INFO L472 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] [2021-06-12 15:25:48,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 15:25:48,174 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 51 times [2021-06-12 15:25:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:48,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819538817] [2021-06-12 15:25:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:48,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:48,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819538817] [2021-06-12 15:25:48,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819538817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:48,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058978737] [2021-06-12 15:25:48,248 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:48,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:25:48,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058978737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:48,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 15:25:48,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596455673] [2021-06-12 15:25:48,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:48,383 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:48,677 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-12 15:25:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:25:48,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-06-12 15:25:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:48,681 INFO L225 Difference]: With dead ends: 3908 [2021-06-12 15:25:48,681 INFO L226 Difference]: Without dead ends: 3638 [2021-06-12 15:25:48,681 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:25:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-12 15:25:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-12 15:25:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-12 15:25:48,707 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-12 15:25:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:48,707 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-12 15:25:48,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-12 15:25:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:25:48,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:48,709 INFO L472 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] [2021-06-12 15:25:48,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:48,909 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 52 times [2021-06-12 15:25:48,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:48,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824459319] [2021-06-12 15:25:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:48,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824459319] [2021-06-12 15:25:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824459319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532895753] [2021-06-12 15:25:48,986 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:49,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:25:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:49,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532895753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:49,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:49,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:25:49,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102297072] [2021-06-12 15:25:49,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:25:49,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:25:49,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:49,130 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:49,510 INFO L93 Difference]: Finished difference Result 3203 states and 8605 transitions. [2021-06-12 15:25:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:25:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:25:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:49,513 INFO L225 Difference]: With dead ends: 3203 [2021-06-12 15:25:49,513 INFO L226 Difference]: Without dead ends: 2831 [2021-06-12 15:25:49,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:25:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-06-12 15:25:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-06-12 15:25:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.78928283642224) internal successors, (6923), 2482 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-06-12 15:25:49,555 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-06-12 15:25:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:49,555 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-06-12 15:25:49,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-06-12 15:25:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:25:49,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:49,558 INFO L472 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] [2021-06-12 15:25:49,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 15:25:49,773 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 53 times [2021-06-12 15:25:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:49,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695568468] [2021-06-12 15:25:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:49,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:49,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695568468] [2021-06-12 15:25:49,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695568468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:49,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854826171] [2021-06-12 15:25:49,831 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:49,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:25:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854826171] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:49,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 15:25:49,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-12 15:25:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395214809] [2021-06-12 15:25:49,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:49,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:49,989 INFO L87 Difference]: Start difference. First operand 2483 states and 6923 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:50,107 INFO L93 Difference]: Finished difference Result 5807 states and 15758 transitions. [2021-06-12 15:25:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:50,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:25:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:50,108 INFO L225 Difference]: With dead ends: 5807 [2021-06-12 15:25:50,108 INFO L226 Difference]: Without dead ends: 1279 [2021-06-12 15:25:50,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-12 15:25:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-06-12 15:25:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.5610328638497655) internal successors, (3273), 1278 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-06-12 15:25:50,121 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-06-12 15:25:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:50,121 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-06-12 15:25:50,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-06-12 15:25:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:25:50,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:50,122 INFO L472 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] [2021-06-12 15:25:50,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:50,338 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 945465466, now seen corresponding path program 54 times [2021-06-12 15:25:50,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:50,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957221452] [2021-06-12 15:25:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957221452] [2021-06-12 15:25:50,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957221452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091655721] [2021-06-12 15:25:50,405 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:50,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:25:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:50,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091655721] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:50,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 15:25:50,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-06-12 15:25:50,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500670872] [2021-06-12 15:25:50,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:50,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:50,561 INFO L87 Difference]: Start difference. First operand 1279 states and 3273 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:50,670 INFO L93 Difference]: Finished difference Result 2288 states and 5575 transitions. [2021-06-12 15:25:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-12 15:25:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:50,670 INFO L225 Difference]: With dead ends: 2288 [2021-06-12 15:25:50,671 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 15:25:50,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 15:25:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 15:25:50,671 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) [2021-06-12 15:25:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 15:25:50,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-06-12 15:25:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:50,671 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 15:25:50,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 15:25:50,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:25:50,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 15:25:50,886 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:25:50,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:25:50 BasicIcfg [2021-06-12 15:25:50,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:25:50,888 INFO L168 Benchmark]: Toolchain (without parser) took 42638.34 ms. Allocated memory was 187.7 MB in the beginning and 486.5 MB in the end (delta: 298.8 MB). Free memory was 151.4 MB in the beginning and 214.9 MB in the end (delta: -63.6 MB). Peak memory consumption was 235.6 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:50,888 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:25:50,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.21 ms. Allocated memory is still 187.7 MB. Free memory was 151.2 MB in the beginning and 151.9 MB in the end (delta: -701.6 kB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:50,888 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.69 ms. Allocated memory is still 187.7 MB. Free memory was 151.9 MB in the beginning and 150.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:50,888 INFO L168 Benchmark]: Boogie Preprocessor took 27.49 ms. Allocated memory is still 187.7 MB. Free memory was 150.3 MB in the beginning and 148.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:50,888 INFO L168 Benchmark]: RCFGBuilder took 355.45 ms. Allocated memory is still 187.7 MB. Free memory was 148.7 MB in the beginning and 127.2 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:50,888 INFO L168 Benchmark]: TraceAbstraction took 41778.24 ms. Allocated memory was 187.7 MB in the beginning and 486.5 MB in the end (delta: 298.8 MB). Free memory was 126.7 MB in the beginning and 214.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 210.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:25:50,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 428.21 ms. Allocated memory is still 187.7 MB. Free memory was 151.2 MB in the beginning and 151.9 MB in the end (delta: -701.6 kB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.69 ms. Allocated memory is still 187.7 MB. Free memory was 151.9 MB in the beginning and 150.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.49 ms. Allocated memory is still 187.7 MB. Free memory was 150.3 MB in the beginning and 148.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 355.45 ms. Allocated memory is still 187.7 MB. Free memory was 148.7 MB in the beginning and 127.2 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 41778.24 ms. Allocated memory was 187.7 MB in the beginning and 486.5 MB in the end (delta: 298.8 MB). Free memory was 126.7 MB in the beginning and 214.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 210.1 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: 41690.1ms, OverallIterations: 65, TraceHistogramMax: 6, EmptinessCheckTime: 123.4ms, AutomataDifference: 13742.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 69.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6461 SDtfs, 24816 SDslu, 41922 SDs, 0 SdLazy, 7327 SolverSat, 2816 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3355.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5531 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 1602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8753 ImplicationChecksByTransitivity, 11876.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2568occurred in iteration=62, InterpolantAutomatonStates: 1326, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1462.9ms AutomataMinimizationTime, 65 MinimizatonAttempts, 32892 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 580.9ms SsaConstructionTime, 1288.4ms SatisfiabilityAnalysisTime, 10106.9ms InterpolantComputationTime, 8104 NumberOfCodeBlocks, 8100 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 7981 ConstructedInterpolants, 0 QuantifiedInterpolants, 30315 SizeOfPredicates, 484 NumberOfNonLiveVariables, 9052 ConjunctsInSsa, 768 ConjunctsInUnsatCore, 123 InterpolantComputations, 9 PerfectInterpolantSequences, 377/4840 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...