/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-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 16:02:27,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 16:02:27,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 16:02:27,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 16:02:27,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 16:02:27,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 16:02:27,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 16:02:27,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 16:02:27,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 16:02:27,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 16:02:27,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 16:02:27,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 16:02:27,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 16:02:27,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 16:02:27,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 16:02:27,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 16:02:27,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 16:02:27,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 16:02:27,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 16:02:27,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 16:02:27,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 16:02:27,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 16:02:27,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 16:02:27,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 16:02:27,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-12 16:02:27,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-12 16:02:27,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-12 16:02:27,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-12 16:02:27,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-12 16:02:27,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-08-12 16:02:27,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 16:02:27,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 16:02:27,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 16:02:27,891 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 [2021-08-12 16:02:27,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 16:02:27,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 16:02:27,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 16:02:27,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 16:02:27,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 16:02:27,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 16:02:27,908 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 16:02:27,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 16:02:27,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 16:02:27,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 16:02:27,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 16:02:27,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 16:02:27,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 16:02:27,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 16:02:27,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 16:02:27,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 16:02:27,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 16:02:27,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 16:02:27,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 16:02:27,910 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 16:02:27,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 16:02:27,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 16:02:28,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 16:02:28,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 16:02:28,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 16:02:28,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-12 16:02:28,142 INFO L275 PluginConnector]: CDTParser initialized [2021-08-12 16:02:28,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-08-12 16:02:28,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83a10eb2/2a4c04342b9e494db10eda8d41a7e17f/FLAG63b15b816 [2021-08-12 16:02:28,664 INFO L306 CDTParser]: Found 1 translation units. [2021-08-12 16:02:28,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-08-12 16:02:28,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83a10eb2/2a4c04342b9e494db10eda8d41a7e17f/FLAG63b15b816 [2021-08-12 16:02:28,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83a10eb2/2a4c04342b9e494db10eda8d41a7e17f [2021-08-12 16:02:28,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 16:02:28,700 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-12 16:02:28,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-12 16:02:28,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-12 16:02:28,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-12 16:02:28,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 04:02:28" (1/1) ... [2021-08-12 16:02:28,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43016e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:28, skipping insertion in model container [2021-08-12 16:02:28,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 04:02:28" (1/1) ... [2021-08-12 16:02:28,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-12 16:02:28,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-12 16:02:29,010 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-longer-2.i[30963,30976] [2021-08-12 16:02:29,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 16:02:29,017 INFO L203 MainTranslator]: Completed pre-run [2021-08-12 16:02:29,048 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2021-08-12 16:02:29,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 16:02:29,100 INFO L208 MainTranslator]: Completed translation [2021-08-12 16:02:29,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29 WrapperNode [2021-08-12 16:02:29,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-12 16:02:29,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 16:02:29,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 16:02:29,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 16:02:29,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 16:02:29,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 16:02:29,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 16:02:29,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 16:02:29,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (1/1) ... [2021-08-12 16:02:29,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 16:02:29,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 16:02:29,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 16:02:29,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 16:02:29,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (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 [2021-08-12 16:02:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-12 16:02:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-12 16:02:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-12 16:02:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-12 16:02:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-12 16:02:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-12 16:02:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-12 16:02:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-12 16:02:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-12 16:02:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-12 16:02:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 16:02:29,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 16:02:29,262 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 16:02:29,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 16:02:29,564 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-12 16:02:29,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 04:02:29 BoogieIcfgContainer [2021-08-12 16:02:29,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 16:02:29,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 16:02:29,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 16:02:29,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 16:02:29,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.08 04:02:28" (1/3) ... [2021-08-12 16:02:29,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc3bdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 04:02:29, skipping insertion in model container [2021-08-12 16:02:29,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:29" (2/3) ... [2021-08-12 16:02:29,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc3bdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 04:02:29, skipping insertion in model container [2021-08-12 16:02:29,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 04:02:29" (3/3) ... [2021-08-12 16:02:29,569 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-08-12 16:02:29,573 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 16:02:29,573 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 16:02:29,573 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 16:02:29,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,592 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,598 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,605 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,605 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,606 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:29,607 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 16:02:29,620 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 16:02:29,632 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 16:02:29,633 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 16:02:29,633 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 16:02:29,633 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 16:02:29,633 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 16:02:29,633 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 16:02:29,633 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 16:02:29,633 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 16:02:29,639 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-08-12 16:02:29,711 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) [2021-08-12 16:02:29,717 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) [2021-08-12 16:02:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 16:02:29,723 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:29,724 INFO L550 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] [2021-08-12 16:02:29,724 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-08-12 16:02:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:29,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767168970] [2021-08-12 16:02:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:29,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:29,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767168970] [2021-08-12 16:02:29,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767168970] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:29,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:29,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:29,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747540019] [2021-08-12 16:02:29,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:29,999 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) [2021-08-12 16:02:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:30,316 INFO L93 Difference]: Finished difference Result 4840 states and 15487 transitions. [2021-08-12 16:02:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 16:02:30,322 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 [2021-08-12 16:02:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:30,345 INFO L225 Difference]: With dead ends: 4840 [2021-08-12 16:02:30,345 INFO L226 Difference]: Without dead ends: 1242 [2021-08-12 16:02:30,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-08-12 16:02:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-08-12 16:02:30,436 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) [2021-08-12 16:02:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-08-12 16:02:30,445 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-08-12 16:02:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:30,445 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-08-12 16:02:30,445 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) [2021-08-12 16:02:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-08-12 16:02:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 16:02:30,451 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:30,452 INFO L550 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] [2021-08-12 16:02:30,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 16:02:30,452 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-08-12 16:02:30,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:30,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470888798] [2021-08-12 16:02:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470888798] [2021-08-12 16:02:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470888798] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:30,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:30,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:30,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908359878] [2021-08-12 16:02:30,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:30,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:30,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:30,571 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) [2021-08-12 16:02:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:30,695 INFO L93 Difference]: Finished difference Result 1354 states and 3700 transitions. [2021-08-12 16:02:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 16:02:30,696 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 [2021-08-12 16:02:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:30,703 INFO L225 Difference]: With dead ends: 1354 [2021-08-12 16:02:30,703 INFO L226 Difference]: Without dead ends: 942 [2021-08-12 16:02:30,705 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-08-12 16:02:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-08-12 16:02:30,720 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) [2021-08-12 16:02:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-08-12 16:02:30,724 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-08-12 16:02:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:30,725 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-08-12 16:02:30,725 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) [2021-08-12 16:02:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-08-12 16:02:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 16:02:30,726 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:30,726 INFO L550 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] [2021-08-12 16:02:30,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 16:02:30,727 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-08-12 16:02:30,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:30,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314939030] [2021-08-12 16:02:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:30,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:30,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314939030] [2021-08-12 16:02:30,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314939030] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:30,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:30,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:30,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984146812] [2021-08-12 16:02:30,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:30,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:30,837 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) [2021-08-12 16:02:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:30,936 INFO L93 Difference]: Finished difference Result 1462 states and 4020 transitions. [2021-08-12 16:02:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 16:02:30,936 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 [2021-08-12 16:02:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:30,941 INFO L225 Difference]: With dead ends: 1462 [2021-08-12 16:02:30,941 INFO L226 Difference]: Without dead ends: 920 [2021-08-12 16:02:30,943 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-12 16:02:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-08-12 16:02:30,959 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) [2021-08-12 16:02:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-08-12 16:02:30,964 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-08-12 16:02:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:30,964 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-08-12 16:02:30,964 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) [2021-08-12 16:02:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-08-12 16:02:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:30,966 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:30,966 INFO L550 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] [2021-08-12 16:02:30,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 16:02:30,967 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:30,968 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-08-12 16:02:30,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:30,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560292024] [2021-08-12 16:02:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:31,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:31,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560292024] [2021-08-12 16:02:31,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560292024] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:31,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:31,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:31,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337167601] [2021-08-12 16:02:31,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:31,069 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) [2021-08-12 16:02:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:31,206 INFO L93 Difference]: Finished difference Result 1432 states and 3904 transitions. [2021-08-12 16:02:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 16:02:31,207 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 [2021-08-12 16:02:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:31,216 INFO L225 Difference]: With dead ends: 1432 [2021-08-12 16:02:31,216 INFO L226 Difference]: Without dead ends: 1044 [2021-08-12 16:02:31,219 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-08-12 16:02:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-08-12 16:02:31,238 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) [2021-08-12 16:02:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-08-12 16:02:31,242 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-08-12 16:02:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:31,244 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-08-12 16:02:31,244 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) [2021-08-12 16:02:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-08-12 16:02:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:31,245 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:31,245 INFO L550 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] [2021-08-12 16:02:31,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 16:02:31,245 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:31,246 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-08-12 16:02:31,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:31,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102714408] [2021-08-12 16:02:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:31,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:31,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102714408] [2021-08-12 16:02:31,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102714408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:31,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:31,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 16:02:31,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604286324] [2021-08-12 16:02:31,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 16:02:31,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 16:02:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 16:02:31,334 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) [2021-08-12 16:02:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:31,531 INFO L93 Difference]: Finished difference Result 1900 states and 5256 transitions. [2021-08-12 16:02:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:31,542 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 [2021-08-12 16:02:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:31,550 INFO L225 Difference]: With dead ends: 1900 [2021-08-12 16:02:31,550 INFO L226 Difference]: Without dead ends: 1505 [2021-08-12 16:02:31,551 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-08-12 16:02:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-08-12 16:02:31,570 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) [2021-08-12 16:02:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-08-12 16:02:31,575 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-08-12 16:02:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:31,575 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-08-12 16:02:31,575 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) [2021-08-12 16:02:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-08-12 16:02:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:31,576 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:31,576 INFO L550 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] [2021-08-12 16:02:31,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 16:02:31,577 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-08-12 16:02:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:31,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199632783] [2021-08-12 16:02:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:31,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:31,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199632783] [2021-08-12 16:02:31,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199632783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:31,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:31,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:31,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149191304] [2021-08-12 16:02:31,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:31,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:31,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:31,621 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) [2021-08-12 16:02:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:31,745 INFO L93 Difference]: Finished difference Result 2339 states and 6390 transitions. [2021-08-12 16:02:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:31,746 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 [2021-08-12 16:02:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:31,755 INFO L225 Difference]: With dead ends: 2339 [2021-08-12 16:02:31,755 INFO L226 Difference]: Without dead ends: 1944 [2021-08-12 16:02:31,756 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-08-12 16:02:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-08-12 16:02:31,782 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) [2021-08-12 16:02:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-08-12 16:02:31,788 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-08-12 16:02:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:31,788 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-08-12 16:02:31,788 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) [2021-08-12 16:02:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-08-12 16:02:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:31,789 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:31,789 INFO L550 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] [2021-08-12 16:02:31,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 16:02:31,790 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-08-12 16:02:31,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:31,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58227974] [2021-08-12 16:02:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:31,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:31,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58227974] [2021-08-12 16:02:31,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58227974] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:31,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:31,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:31,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029537495] [2021-08-12 16:02:31,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:31,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:31,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:31,837 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) [2021-08-12 16:02:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:31,956 INFO L93 Difference]: Finished difference Result 1647 states and 4543 transitions. [2021-08-12 16:02:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:31,956 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 [2021-08-12 16:02:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:31,962 INFO L225 Difference]: With dead ends: 1647 [2021-08-12 16:02:31,962 INFO L226 Difference]: Without dead ends: 1138 [2021-08-12 16:02:31,963 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-08-12 16:02:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-08-12 16:02:31,981 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) [2021-08-12 16:02:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-08-12 16:02:31,985 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-08-12 16:02:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:31,986 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-08-12 16:02:31,986 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) [2021-08-12 16:02:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-08-12 16:02:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:31,987 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:31,987 INFO L550 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] [2021-08-12 16:02:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 16:02:31,987 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-08-12 16:02:31,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:31,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126297753] [2021-08-12 16:02:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126297753] [2021-08-12 16:02:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126297753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091250958] [2021-08-12 16:02:32,054 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 [2021-08-12 16:02:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091250958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:32,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:32,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698747881] [2021-08-12 16:02:32,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:32,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:32,228 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 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) [2021-08-12 16:02:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:32,400 INFO L93 Difference]: Finished difference Result 1579 states and 4299 transitions. [2021-08-12 16:02:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 16:02:32,401 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 45 [2021-08-12 16:02:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:32,407 INFO L225 Difference]: With dead ends: 1579 [2021-08-12 16:02:32,407 INFO L226 Difference]: Without dead ends: 1181 [2021-08-12 16:02:32,408 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-08-12 16:02:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-08-12 16:02:32,434 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) [2021-08-12 16:02:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-08-12 16:02:32,439 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-08-12 16:02:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:32,439 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-08-12 16:02:32,439 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) [2021-08-12 16:02:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-08-12 16:02:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:32,440 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:32,440 INFO L550 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] [2021-08-12 16:02:32,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-12 16:02:32,661 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:32,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-08-12 16:02:32,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:32,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124946393] [2021-08-12 16:02:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:32,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124946393] [2021-08-12 16:02:32,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124946393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043366185] [2021-08-12 16:02:32,733 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 [2021-08-12 16:02:32,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:32,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043366185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:32,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 16:02:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909065840] [2021-08-12 16:02:32,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 16:02:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 16:02:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:32,866 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) [2021-08-12 16:02:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:33,018 INFO L93 Difference]: Finished difference Result 2461 states and 6703 transitions. [2021-08-12 16:02:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 16:02:33,018 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 [2021-08-12 16:02:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:33,027 INFO L225 Difference]: With dead ends: 2461 [2021-08-12 16:02:33,027 INFO L226 Difference]: Without dead ends: 2063 [2021-08-12 16:02:33,027 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-08-12 16:02:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-08-12 16:02:33,075 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) [2021-08-12 16:02:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-08-12 16:02:33,080 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-08-12 16:02:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:33,081 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-08-12 16:02:33,081 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) [2021-08-12 16:02:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-08-12 16:02:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:33,082 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:33,082 INFO L550 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] [2021-08-12 16:02:33,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:33,299 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-08-12 16:02:33,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:33,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200133055] [2021-08-12 16:02:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:33,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:33,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200133055] [2021-08-12 16:02:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200133055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:33,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848356906] [2021-08-12 16:02:33,346 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 [2021-08-12 16:02:33,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 16:02:33,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:33,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848356906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:33,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:33,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:33,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273024741] [2021-08-12 16:02:33,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:33,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:33,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:33,474 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) [2021-08-12 16:02:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:33,751 INFO L93 Difference]: Finished difference Result 2249 states and 6261 transitions. [2021-08-12 16:02:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:33,751 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 [2021-08-12 16:02:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:33,759 INFO L225 Difference]: With dead ends: 2249 [2021-08-12 16:02:33,759 INFO L226 Difference]: Without dead ends: 1546 [2021-08-12 16:02:33,760 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-08-12 16:02:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-08-12 16:02:33,786 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) [2021-08-12 16:02:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-08-12 16:02:33,792 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-08-12 16:02:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:33,792 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-08-12 16:02:33,792 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) [2021-08-12 16:02:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-08-12 16:02:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:33,793 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:33,793 INFO L550 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] [2021-08-12 16:02:34,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 16:02:34,010 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-08-12 16:02:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363444812] [2021-08-12 16:02:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363444812] [2021-08-12 16:02:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363444812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56423640] [2021-08-12 16:02:34,059 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 [2021-08-12 16:02:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56423640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:34,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032786810] [2021-08-12 16:02:34,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:34,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:34,204 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) [2021-08-12 16:02:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:34,399 INFO L93 Difference]: Finished difference Result 2526 states and 7020 transitions. [2021-08-12 16:02:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 16:02:34,400 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 [2021-08-12 16:02:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:34,409 INFO L225 Difference]: With dead ends: 2526 [2021-08-12 16:02:34,409 INFO L226 Difference]: Without dead ends: 1926 [2021-08-12 16:02:34,411 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:02:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-08-12 16:02:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-08-12 16:02:34,444 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) [2021-08-12 16:02:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-08-12 16:02:34,450 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-08-12 16:02:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:34,450 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-08-12 16:02:34,451 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) [2021-08-12 16:02:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-08-12 16:02:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:34,452 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:34,453 INFO L550 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] [2021-08-12 16:02:34,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:34,669 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-08-12 16:02:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:34,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527931641] [2021-08-12 16:02:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527931641] [2021-08-12 16:02:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527931641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600080277] [2021-08-12 16:02:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600080277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:34,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:34,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994914123] [2021-08-12 16:02:34,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:34,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:34,878 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:35,086 INFO L93 Difference]: Finished difference Result 1994 states and 5429 transitions. [2021-08-12 16:02:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 16:02:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:02:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:35,095 INFO L225 Difference]: With dead ends: 1994 [2021-08-12 16:02:35,095 INFO L226 Difference]: Without dead ends: 1596 [2021-08-12 16:02:35,095 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:02:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-08-12 16:02:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-08-12 16:02:35,123 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) [2021-08-12 16:02:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-08-12 16:02:35,129 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-08-12 16:02:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:35,129 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-08-12 16:02:35,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-08-12 16:02:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:35,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:35,132 INFO L550 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] [2021-08-12 16:02:35,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 16:02:35,348 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-08-12 16:02:35,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:35,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860139311] [2021-08-12 16:02:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:35,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860139311] [2021-08-12 16:02:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860139311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396065641] [2021-08-12 16:02:35,415 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 [2021-08-12 16:02:35,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:35,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396065641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:35,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:35,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-12 16:02:35,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045811755] [2021-08-12 16:02:35,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:35,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:35,551 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:35,761 INFO L93 Difference]: Finished difference Result 2109 states and 5659 transitions. [2021-08-12 16:02:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:02:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:35,768 INFO L225 Difference]: With dead ends: 2109 [2021-08-12 16:02:35,768 INFO L226 Difference]: Without dead ends: 1711 [2021-08-12 16:02:35,768 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:02:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-08-12 16:02:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-08-12 16:02:35,797 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) [2021-08-12 16:02:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-08-12 16:02:35,803 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-08-12 16:02:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:35,804 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-08-12 16:02:35,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-08-12 16:02:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:35,806 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:35,806 INFO L550 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] [2021-08-12 16:02:36,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:36,022 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:36,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-08-12 16:02:36,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:36,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450105377] [2021-08-12 16:02:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:36,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450105377] [2021-08-12 16:02:36,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450105377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841641829] [2021-08-12 16:02:36,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:36,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 16:02:36,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841641829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:36,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:36,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097952295] [2021-08-12 16:02:36,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:36,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:36,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:36,244 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) [2021-08-12 16:02:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:36,575 INFO L93 Difference]: Finished difference Result 2797 states and 7633 transitions. [2021-08-12 16:02:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:36,575 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 [2021-08-12 16:02:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:36,583 INFO L225 Difference]: With dead ends: 2797 [2021-08-12 16:02:36,583 INFO L226 Difference]: Without dead ends: 2046 [2021-08-12 16:02:36,584 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-12 16:02:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-08-12 16:02:36,623 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) [2021-08-12 16:02:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-08-12 16:02:36,630 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-08-12 16:02:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:36,630 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-08-12 16:02:36,630 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) [2021-08-12 16:02:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-08-12 16:02:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:36,632 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:36,632 INFO L550 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] [2021-08-12 16:02:36,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 16:02:36,849 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-08-12 16:02:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:36,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369885248] [2021-08-12 16:02:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:36,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369885248] [2021-08-12 16:02:36,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369885248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306785780] [2021-08-12 16:02:36,948 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 [2021-08-12 16:02:37,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:37,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:37,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306785780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:37,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-12 16:02:37,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510881217] [2021-08-12 16:02:37,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:37,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:37,120 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:37,384 INFO L93 Difference]: Finished difference Result 3006 states and 8183 transitions. [2021-08-12 16:02:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:02:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:37,393 INFO L225 Difference]: With dead ends: 3006 [2021-08-12 16:02:37,393 INFO L226 Difference]: Without dead ends: 2608 [2021-08-12 16:02:37,394 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-08-12 16:02:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-08-12 16:02:37,433 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) [2021-08-12 16:02:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-08-12 16:02:37,441 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-08-12 16:02:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:37,441 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-08-12 16:02:37,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-08-12 16:02:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:37,443 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:37,443 INFO L550 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] [2021-08-12 16:02:37,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 16:02:37,663 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-08-12 16:02:37,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:37,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064565344] [2021-08-12 16:02:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:37,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064565344] [2021-08-12 16:02:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064565344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622383858] [2021-08-12 16:02:37,715 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 [2021-08-12 16:02:37,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 16:02:37,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622383858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:37,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:37,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111464730] [2021-08-12 16:02:37,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:37,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:37,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:37,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:37,904 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) [2021-08-12 16:02:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:38,260 INFO L93 Difference]: Finished difference Result 2949 states and 8171 transitions. [2021-08-12 16:02:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:38,260 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 [2021-08-12 16:02:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:38,268 INFO L225 Difference]: With dead ends: 2949 [2021-08-12 16:02:38,268 INFO L226 Difference]: Without dead ends: 2246 [2021-08-12 16:02:38,270 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-12 16:02:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-08-12 16:02:38,305 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) [2021-08-12 16:02:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-08-12 16:02:38,312 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-08-12 16:02:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:38,312 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-08-12 16:02:38,312 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) [2021-08-12 16:02:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-08-12 16:02:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:38,314 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:38,314 INFO L550 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] [2021-08-12 16:02:38,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 16:02:38,533 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-08-12 16:02:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:38,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15837736] [2021-08-12 16:02:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:38,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15837736] [2021-08-12 16:02:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15837736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035244274] [2021-08-12 16:02:38,593 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 [2021-08-12 16:02:38,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 16:02:38,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:38,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:38,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:38,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035244274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:38,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:38,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:38,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587817487] [2021-08-12 16:02:38,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:38,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:38,800 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:39,023 INFO L93 Difference]: Finished difference Result 2689 states and 7225 transitions. [2021-08-12 16:02:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:39,030 INFO L225 Difference]: With dead ends: 2689 [2021-08-12 16:02:39,031 INFO L226 Difference]: Without dead ends: 2212 [2021-08-12 16:02:39,032 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:02:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-08-12 16:02:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-08-12 16:02:39,067 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) [2021-08-12 16:02:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-08-12 16:02:39,078 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-08-12 16:02:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:39,078 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-08-12 16:02:39,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-08-12 16:02:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:39,080 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:39,080 INFO L550 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] [2021-08-12 16:02:39,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 16:02:39,300 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-08-12 16:02:39,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:39,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601915902] [2021-08-12 16:02:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:39,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601915902] [2021-08-12 16:02:39,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601915902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085889394] [2021-08-12 16:02:39,360 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 [2021-08-12 16:02:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:39,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:39,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085889394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:39,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 16:02:39,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934739461] [2021-08-12 16:02:39,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 16:02:39,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 16:02:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:39,494 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:39,682 INFO L93 Difference]: Finished difference Result 2439 states and 6469 transitions. [2021-08-12 16:02:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 16:02:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:02:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:39,689 INFO L225 Difference]: With dead ends: 2439 [2021-08-12 16:02:39,690 INFO L226 Difference]: Without dead ends: 2026 [2021-08-12 16:02:39,691 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:02:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-08-12 16:02:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-08-12 16:02:39,733 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) [2021-08-12 16:02:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-08-12 16:02:39,739 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-08-12 16:02:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:39,740 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-08-12 16:02:39,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-08-12 16:02:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:39,742 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:39,742 INFO L550 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] [2021-08-12 16:02:39,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:39,959 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-08-12 16:02:39,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:39,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316839013] [2021-08-12 16:02:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:40,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:40,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316839013] [2021-08-12 16:02:40,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316839013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293771171] [2021-08-12 16:02:40,023 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 [2021-08-12 16:02:40,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293771171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:40,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 16:02:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206051748] [2021-08-12 16:02:40,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:40,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:40,162 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 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) [2021-08-12 16:02:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:40,396 INFO L93 Difference]: Finished difference Result 2374 states and 6339 transitions. [2021-08-12 16:02:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:40,397 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 [2021-08-12 16:02:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:40,404 INFO L225 Difference]: With dead ends: 2374 [2021-08-12 16:02:40,404 INFO L226 Difference]: Without dead ends: 1961 [2021-08-12 16:02:40,405 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:02:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-08-12 16:02:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-08-12 16:02:40,452 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) [2021-08-12 16:02:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-08-12 16:02:40,458 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-08-12 16:02:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:40,458 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-08-12 16:02:40,459 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) [2021-08-12 16:02:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-08-12 16:02:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:40,460 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:40,460 INFO L550 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] [2021-08-12 16:02:40,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:40,677 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-08-12 16:02:40,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:40,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244937391] [2021-08-12 16:02:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:40,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244937391] [2021-08-12 16:02:40,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244937391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742464422] [2021-08-12 16:02:40,769 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 [2021-08-12 16:02:40,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 16:02:40,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:40,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742464422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:40,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320177469] [2021-08-12 16:02:40,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:40,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:40,905 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 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) [2021-08-12 16:02:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:41,248 INFO L93 Difference]: Finished difference Result 3416 states and 9510 transitions. [2021-08-12 16:02:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:02:41,248 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 [2021-08-12 16:02:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:41,255 INFO L225 Difference]: With dead ends: 3416 [2021-08-12 16:02:41,255 INFO L226 Difference]: Without dead ends: 2476 [2021-08-12 16:02:41,257 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-08-12 16:02:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-08-12 16:02:41,304 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) [2021-08-12 16:02:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-08-12 16:02:41,312 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-08-12 16:02:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:41,312 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-08-12 16:02:41,312 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) [2021-08-12 16:02:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-08-12 16:02:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:41,314 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:41,314 INFO L550 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] [2021-08-12 16:02:41,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 16:02:41,529 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:41,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-08-12 16:02:41,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:41,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396118995] [2021-08-12 16:02:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:41,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:41,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396118995] [2021-08-12 16:02:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396118995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:41,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33482788] [2021-08-12 16:02:41,654 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 [2021-08-12 16:02:41,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:41,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:41,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33482788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:41,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:41,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:41,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377565208] [2021-08-12 16:02:41,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:41,816 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:02:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:42,060 INFO L93 Difference]: Finished difference Result 2444 states and 6629 transitions. [2021-08-12 16:02:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:02:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 65 [2021-08-12 16:02:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:42,067 INFO L225 Difference]: With dead ends: 2444 [2021-08-12 16:02:42,067 INFO L226 Difference]: Without dead ends: 2046 [2021-08-12 16:02:42,068 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-12 16:02:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-08-12 16:02:42,114 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) [2021-08-12 16:02:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:42,120 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:42,120 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:42,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:02:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:42,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:42,123 INFO L550 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] [2021-08-12 16:02:42,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:42,337 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-08-12 16:02:42,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:42,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160687793] [2021-08-12 16:02:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:42,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:42,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160687793] [2021-08-12 16:02:42,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160687793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:42,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351855252] [2021-08-12 16:02:42,427 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 [2021-08-12 16:02:42,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 16:02:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351855252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:42,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:42,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505921675] [2021-08-12 16:02:42,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:42,600 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) [2021-08-12 16:02:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:43,031 INFO L93 Difference]: Finished difference Result 2609 states and 6959 transitions. [2021-08-12 16:02:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:43,032 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 [2021-08-12 16:02:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:43,039 INFO L225 Difference]: With dead ends: 2609 [2021-08-12 16:02:43,039 INFO L226 Difference]: Without dead ends: 2211 [2021-08-12 16:02:43,040 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-08-12 16:02:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-08-12 16:02:43,134 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) [2021-08-12 16:02:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:43,141 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:43,142 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:43,142 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) [2021-08-12 16:02:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:43,144 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:43,144 INFO L550 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] [2021-08-12 16:02:43,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 16:02:43,361 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-08-12 16:02:43,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:43,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046888285] [2021-08-12 16:02:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:43,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:43,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046888285] [2021-08-12 16:02:43,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046888285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:43,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496885884] [2021-08-12 16:02:43,460 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 [2021-08-12 16:02:43,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 16:02:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:43,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496885884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:43,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:43,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:43,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375386813] [2021-08-12 16:02:43,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:43,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:43,647 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) [2021-08-12 16:02:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:44,017 INFO L93 Difference]: Finished difference Result 2694 states and 7129 transitions. [2021-08-12 16:02:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:44,018 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 [2021-08-12 16:02:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:44,025 INFO L225 Difference]: With dead ends: 2694 [2021-08-12 16:02:44,026 INFO L226 Difference]: Without dead ends: 2296 [2021-08-12 16:02:44,027 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-08-12 16:02:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-08-12 16:02:44,078 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) [2021-08-12 16:02:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:44,085 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:44,085 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:44,085 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) [2021-08-12 16:02:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:44,087 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:44,087 INFO L550 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] [2021-08-12 16:02:44,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:44,301 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-08-12 16:02:44,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:44,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755836080] [2021-08-12 16:02:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:44,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:44,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755836080] [2021-08-12 16:02:44,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755836080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:44,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079282372] [2021-08-12 16:02:44,376 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 [2021-08-12 16:02:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:44,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079282372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:44,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:44,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:44,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214502294] [2021-08-12 16:02:44,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:44,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:44,581 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) [2021-08-12 16:02:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:44,926 INFO L93 Difference]: Finished difference Result 2624 states and 6989 transitions. [2021-08-12 16:02:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:44,926 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 [2021-08-12 16:02:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:44,933 INFO L225 Difference]: With dead ends: 2624 [2021-08-12 16:02:44,933 INFO L226 Difference]: Without dead ends: 2226 [2021-08-12 16:02:44,934 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-08-12 16:02:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-08-12 16:02:44,988 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) [2021-08-12 16:02:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:44,995 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:44,996 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:44,996 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) [2021-08-12 16:02:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:44,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:44,999 INFO L550 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] [2021-08-12 16:02:45,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 16:02:45,217 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:45,218 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-08-12 16:02:45,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:45,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78718066] [2021-08-12 16:02:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:45,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78718066] [2021-08-12 16:02:45,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78718066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887926536] [2021-08-12 16:02:45,295 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 [2021-08-12 16:02:45,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:45,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887926536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:45,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:45,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:45,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969468564] [2021-08-12 16:02:45,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:45,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:45,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:45,454 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) [2021-08-12 16:02:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:45,958 INFO L93 Difference]: Finished difference Result 3202 states and 8743 transitions. [2021-08-12 16:02:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:45,958 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 [2021-08-12 16:02:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:45,964 INFO L225 Difference]: With dead ends: 3202 [2021-08-12 16:02:45,964 INFO L226 Difference]: Without dead ends: 2451 [2021-08-12 16:02:45,966 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:02:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-08-12 16:02:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-08-12 16:02:46,014 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) [2021-08-12 16:02:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-08-12 16:02:46,021 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-08-12 16:02:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:46,021 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-08-12 16:02:46,021 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) [2021-08-12 16:02:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-08-12 16:02:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:46,023 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:46,023 INFO L550 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] [2021-08-12 16:02:46,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 16:02:46,237 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-08-12 16:02:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:46,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144643958] [2021-08-12 16:02:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:46,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:46,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144643958] [2021-08-12 16:02:46,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144643958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:46,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580853597] [2021-08-12 16:02:46,310 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 [2021-08-12 16:02:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 16:02:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:46,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580853597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:46,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:46,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944829246] [2021-08-12 16:02:46,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:46,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:46,527 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) [2021-08-12 16:02:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:46,896 INFO L93 Difference]: Finished difference Result 3406 states and 9283 transitions. [2021-08-12 16:02:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:46,896 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 [2021-08-12 16:02:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:46,903 INFO L225 Difference]: With dead ends: 3406 [2021-08-12 16:02:46,903 INFO L226 Difference]: Without dead ends: 3008 [2021-08-12 16:02:46,904 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:02:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-08-12 16:02:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-08-12 16:02:46,959 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) [2021-08-12 16:02:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-08-12 16:02:46,966 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-08-12 16:02:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:46,966 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-08-12 16:02:46,966 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) [2021-08-12 16:02:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-08-12 16:02:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:46,968 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:46,968 INFO L550 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] [2021-08-12 16:02:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 16:02:47,185 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-08-12 16:02:47,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:47,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114129688] [2021-08-12 16:02:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:47,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:47,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114129688] [2021-08-12 16:02:47,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114129688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125846379] [2021-08-12 16:02:47,268 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 [2021-08-12 16:02:47,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:47,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:47,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125846379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:47,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40337886] [2021-08-12 16:02:47,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:47,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:47,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:47,412 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) [2021-08-12 16:02:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:47,927 INFO L93 Difference]: Finished difference Result 3349 states and 9271 transitions. [2021-08-12 16:02:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:02:47,928 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 [2021-08-12 16:02:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:47,937 INFO L225 Difference]: With dead ends: 3349 [2021-08-12 16:02:47,937 INFO L226 Difference]: Without dead ends: 2646 [2021-08-12 16:02:47,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:02:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-08-12 16:02:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-08-12 16:02:48,001 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) [2021-08-12 16:02:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-08-12 16:02:48,008 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-08-12 16:02:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:48,008 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-08-12 16:02:48,009 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) [2021-08-12 16:02:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-08-12 16:02:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:48,010 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:48,011 INFO L550 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] [2021-08-12 16:02:48,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 16:02:48,227 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-08-12 16:02:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:48,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626082933] [2021-08-12 16:02:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:48,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:48,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626082933] [2021-08-12 16:02:48,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626082933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:48,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490893068] [2021-08-12 16:02:48,309 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 [2021-08-12 16:02:48,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 16:02:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:48,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:48,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490893068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:48,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:48,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-12 16:02:48,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781620334] [2021-08-12 16:02:48,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:48,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:48,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:48,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:48,511 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) [2021-08-12 16:02:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:48,856 INFO L93 Difference]: Finished difference Result 3189 states and 8525 transitions. [2021-08-12 16:02:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:48,877 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 [2021-08-12 16:02:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:48,883 INFO L225 Difference]: With dead ends: 3189 [2021-08-12 16:02:48,884 INFO L226 Difference]: Without dead ends: 2712 [2021-08-12 16:02:48,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-08-12 16:02:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-08-12 16:02:48,961 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) [2021-08-12 16:02:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-08-12 16:02:48,968 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-08-12 16:02:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:48,968 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-08-12 16:02:48,968 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) [2021-08-12 16:02:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-08-12 16:02:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:48,970 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:48,970 INFO L550 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] [2021-08-12 16:02:49,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 16:02:49,185 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-08-12 16:02:49,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:49,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600789303] [2021-08-12 16:02:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:49,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:49,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600789303] [2021-08-12 16:02:49,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600789303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:49,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233818601] [2021-08-12 16:02:49,250 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 [2021-08-12 16:02:49,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 16:02:49,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:49,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233818601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:49,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:49,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:49,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53987749] [2021-08-12 16:02:49,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:49,394 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) [2021-08-12 16:02:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:49,732 INFO L93 Difference]: Finished difference Result 2989 states and 7869 transitions. [2021-08-12 16:02:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 16:02:49,732 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 [2021-08-12 16:02:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:49,740 INFO L225 Difference]: With dead ends: 2989 [2021-08-12 16:02:49,740 INFO L226 Difference]: Without dead ends: 2576 [2021-08-12 16:02:49,741 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-08-12 16:02:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-08-12 16:02:49,791 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) [2021-08-12 16:02:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-08-12 16:02:49,799 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-08-12 16:02:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:49,799 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-08-12 16:02:49,799 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) [2021-08-12 16:02:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-08-12 16:02:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:49,801 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:49,801 INFO L550 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] [2021-08-12 16:02:50,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:50,017 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-08-12 16:02:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:50,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54264040] [2021-08-12 16:02:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:50,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:50,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54264040] [2021-08-12 16:02:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54264040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:50,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648693712] [2021-08-12 16:02:50,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:50,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648693712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:50,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:50,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-12 16:02:50,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232482225] [2021-08-12 16:02:50,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:50,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:50,296 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) [2021-08-12 16:02:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:50,708 INFO L93 Difference]: Finished difference Result 2924 states and 7739 transitions. [2021-08-12 16:02:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:50,708 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 [2021-08-12 16:02:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:50,715 INFO L225 Difference]: With dead ends: 2924 [2021-08-12 16:02:50,715 INFO L226 Difference]: Without dead ends: 2511 [2021-08-12 16:02:50,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-08-12 16:02:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-08-12 16:02:50,769 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) [2021-08-12 16:02:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-08-12 16:02:50,777 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-08-12 16:02:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:50,777 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-08-12 16:02:50,777 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) [2021-08-12 16:02:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-08-12 16:02:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:50,779 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:50,779 INFO L550 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] [2021-08-12 16:02:50,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 16:02:50,996 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-08-12 16:02:50,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:50,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557879808] [2021-08-12 16:02:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:51,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:51,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557879808] [2021-08-12 16:02:51,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557879808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:51,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126041191] [2021-08-12 16:02:51,063 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 [2021-08-12 16:02:51,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:51,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:51,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126041191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:51,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:51,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:51,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870282969] [2021-08-12 16:02:51,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:51,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:51,269 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) [2021-08-12 16:02:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:51,643 INFO L93 Difference]: Finished difference Result 2849 states and 7589 transitions. [2021-08-12 16:02:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:02:51,645 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 [2021-08-12 16:02:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:51,653 INFO L225 Difference]: With dead ends: 2849 [2021-08-12 16:02:51,653 INFO L226 Difference]: Without dead ends: 2436 [2021-08-12 16:02:51,654 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-08-12 16:02:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-08-12 16:02:51,709 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) [2021-08-12 16:02:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-08-12 16:02:51,719 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-08-12 16:02:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:51,719 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-08-12 16:02:51,719 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) [2021-08-12 16:02:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-08-12 16:02:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:51,721 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:51,721 INFO L550 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] [2021-08-12 16:02:51,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:51,942 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-08-12 16:02:51,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:51,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014841707] [2021-08-12 16:02:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:52,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:52,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014841707] [2021-08-12 16:02:52,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014841707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:52,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986080108] [2021-08-12 16:02:52,013 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 [2021-08-12 16:02:52,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 16:02:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:52,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986080108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:52,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:52,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-12 16:02:52,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429148660] [2021-08-12 16:02:52,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:52,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:52,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:52,173 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) [2021-08-12 16:02:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:52,687 INFO L93 Difference]: Finished difference Result 2774 states and 7439 transitions. [2021-08-12 16:02:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:52,687 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 [2021-08-12 16:02:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:52,694 INFO L225 Difference]: With dead ends: 2774 [2021-08-12 16:02:52,694 INFO L226 Difference]: Without dead ends: 2361 [2021-08-12 16:02:52,696 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-08-12 16:02:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-08-12 16:02:52,743 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) [2021-08-12 16:02:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-08-12 16:02:52,750 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-08-12 16:02:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:52,751 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-08-12 16:02:52,751 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) [2021-08-12 16:02:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-08-12 16:02:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:52,753 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:52,753 INFO L550 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] [2021-08-12 16:02:52,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 16:02:52,972 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-08-12 16:02:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:52,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775707321] [2021-08-12 16:02:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:53,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:53,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775707321] [2021-08-12 16:02:53,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775707321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:53,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694958251] [2021-08-12 16:02:53,037 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 [2021-08-12 16:02:53,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:53,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:53,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:53,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694958251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:53,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:53,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607850128] [2021-08-12 16:02:53,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:53,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:53,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:53,191 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 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) [2021-08-12 16:02:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:53,723 INFO L93 Difference]: Finished difference Result 3816 states and 10610 transitions. [2021-08-12 16:02:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:53,723 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 [2021-08-12 16:02:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:53,732 INFO L225 Difference]: With dead ends: 3816 [2021-08-12 16:02:53,732 INFO L226 Difference]: Without dead ends: 2876 [2021-08-12 16:02:53,734 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:02:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-08-12 16:02:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2256. [2021-08-12 16:02:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.73569844789357) internal successors, (6169), 2255 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6169 transitions. [2021-08-12 16:02:53,818 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6169 transitions. Word has length 65 [2021-08-12 16:02:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:53,818 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6169 transitions. [2021-08-12 16:02:53,818 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) [2021-08-12 16:02:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6169 transitions. [2021-08-12 16:02:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:53,821 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:53,821 INFO L550 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] [2021-08-12 16:02:54,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 16:02:54,026 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:54,027 INFO L82 PathProgramCache]: Analyzing trace with hash -710713404, now seen corresponding path program 23 times [2021-08-12 16:02:54,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:54,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624363367] [2021-08-12 16:02:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:54,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624363367] [2021-08-12 16:02:54,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624363367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784163239] [2021-08-12 16:02:54,192 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 [2021-08-12 16:02:54,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:02:54,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:54,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:54,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784163239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:54,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:54,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:54,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51042558] [2021-08-12 16:02:54,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:54,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:54,401 INFO L87 Difference]: Start difference. First operand 2256 states and 6169 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:54,828 INFO L93 Difference]: Finished difference Result 2894 states and 7829 transitions. [2021-08-12 16:02:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:54,838 INFO L225 Difference]: With dead ends: 2894 [2021-08-12 16:02:54,838 INFO L226 Difference]: Without dead ends: 2496 [2021-08-12 16:02:54,839 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-08-12 16:02:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2331. [2021-08-12 16:02:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-08-12 16:02:54,928 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-08-12 16:02:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:54,928 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-08-12 16:02:54,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-08-12 16:02:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:54,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:54,930 INFO L550 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] [2021-08-12 16:02:55,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 16:02:55,147 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 24 times [2021-08-12 16:02:55,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:55,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644743280] [2021-08-12 16:02:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:55,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:55,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644743280] [2021-08-12 16:02:55,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644743280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:55,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717128832] [2021-08-12 16:02:55,277 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 [2021-08-12 16:02:55,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:02:55,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:55,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717128832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:55,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:55,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:02:55,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065361858] [2021-08-12 16:02:55,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:55,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:55,429 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:55,967 INFO L93 Difference]: Finished difference Result 3109 states and 8259 transitions. [2021-08-12 16:02:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:55,977 INFO L225 Difference]: With dead ends: 3109 [2021-08-12 16:02:55,977 INFO L226 Difference]: Without dead ends: 2711 [2021-08-12 16:02:55,979 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-08-12 16:02:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2331. [2021-08-12 16:02:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-08-12 16:02:56,083 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-08-12 16:02:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:56,083 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-08-12 16:02:56,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-08-12 16:02:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:56,085 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:56,086 INFO L550 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] [2021-08-12 16:02:56,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 16:02:56,301 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 25 times [2021-08-12 16:02:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:56,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873894462] [2021-08-12 16:02:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:56,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:56,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873894462] [2021-08-12 16:02:56,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873894462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:56,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292314594] [2021-08-12 16:02:56,404 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 [2021-08-12 16:02:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:56,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292314594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:56,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:56,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:56,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148466073] [2021-08-12 16:02:56,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:56,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:56,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:56,601 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-08-12 16:02:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:57,239 INFO L93 Difference]: Finished difference Result 3244 states and 8529 transitions. [2021-08-12 16:02:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:02:57,240 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 [2021-08-12 16:02:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:57,249 INFO L225 Difference]: With dead ends: 3244 [2021-08-12 16:02:57,249 INFO L226 Difference]: Without dead ends: 2846 [2021-08-12 16:02:57,250 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-08-12 16:02:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2331. [2021-08-12 16:02:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-08-12 16:02:57,398 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-08-12 16:02:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:57,399 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-08-12 16:02:57,399 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) [2021-08-12 16:02:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-08-12 16:02:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:57,401 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:57,401 INFO L550 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] [2021-08-12 16:02:57,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 16:02:57,619 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:57,619 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 26 times [2021-08-12 16:02:57,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:57,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517219089] [2021-08-12 16:02:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517219089] [2021-08-12 16:02:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517219089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798329265] [2021-08-12 16:02:57,723 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 [2021-08-12 16:02:57,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798329265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:57,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:57,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:02:57,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734447223] [2021-08-12 16:02:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:57,883 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:58,545 INFO L93 Difference]: Finished difference Result 3174 states and 8389 transitions. [2021-08-12 16:02:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:58,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:58,554 INFO L225 Difference]: With dead ends: 3174 [2021-08-12 16:02:58,554 INFO L226 Difference]: Without dead ends: 2776 [2021-08-12 16:02:58,555 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-08-12 16:02:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2331. [2021-08-12 16:02:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-08-12 16:02:58,656 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-08-12 16:02:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:58,656 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-08-12 16:02:58,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-08-12 16:02:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:58,659 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:58,659 INFO L550 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] [2021-08-12 16:02:58,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:58,875 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 27 times [2021-08-12 16:02:58,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:58,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193064903] [2021-08-12 16:02:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:58,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:58,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193064903] [2021-08-12 16:02:58,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193064903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:58,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151149946] [2021-08-12 16:02:58,966 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 [2021-08-12 16:02:59,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:02:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:02:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:59,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151149946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:59,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:59,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966531241] [2021-08-12 16:02:59,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:59,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:59,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:59,146 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-08-12 16:02:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:59,795 INFO L93 Difference]: Finished difference Result 3099 states and 8239 transitions. [2021-08-12 16:02:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:59,796 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 [2021-08-12 16:02:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:59,804 INFO L225 Difference]: With dead ends: 3099 [2021-08-12 16:02:59,804 INFO L226 Difference]: Without dead ends: 2701 [2021-08-12 16:02:59,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:02:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-08-12 16:02:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2331. [2021-08-12 16:02:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-08-12 16:02:59,907 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-08-12 16:02:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:59,907 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-08-12 16:02:59,908 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) [2021-08-12 16:02:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-08-12 16:02:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:59,910 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:59,910 INFO L550 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] [2021-08-12 16:03:00,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 16:03:00,126 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 28 times [2021-08-12 16:03:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:00,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219432189] [2021-08-12 16:03:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:00,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:00,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219432189] [2021-08-12 16:03:00,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219432189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:00,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15873854] [2021-08-12 16:03:00,210 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 [2021-08-12 16:03:00,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:00,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:00,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:00,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15873854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:00,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:00,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:03:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079050507] [2021-08-12 16:03:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:00,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:00,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:00,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:00,352 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:00,953 INFO L93 Difference]: Finished difference Result 3024 states and 8089 transitions. [2021-08-12 16:03:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:03:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:00,962 INFO L225 Difference]: With dead ends: 3024 [2021-08-12 16:03:00,962 INFO L226 Difference]: Without dead ends: 2626 [2021-08-12 16:03:00,963 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-12 16:03:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2331. [2021-08-12 16:03:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-08-12 16:03:01,066 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-08-12 16:03:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:01,066 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-08-12 16:03:01,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-08-12 16:03:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:01,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:01,069 INFO L550 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] [2021-08-12 16:03:01,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-12 16:03:01,285 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 29 times [2021-08-12 16:03:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173140330] [2021-08-12 16:03:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:01,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173140330] [2021-08-12 16:03:01,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173140330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863033266] [2021-08-12 16:03:01,371 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 [2021-08-12 16:03:01,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:03:01,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:01,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863033266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:01,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:01,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182033406] [2021-08-12 16:03:01,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:01,518 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-08-12 16:03:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:02,245 INFO L93 Difference]: Finished difference Result 3602 states and 9843 transitions. [2021-08-12 16:03:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:03:02,246 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 [2021-08-12 16:03:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:02,255 INFO L225 Difference]: With dead ends: 3602 [2021-08-12 16:03:02,255 INFO L226 Difference]: Without dead ends: 2851 [2021-08-12 16:03:02,256 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:03:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-08-12 16:03:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2361. [2021-08-12 16:03:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 2.730508474576271) internal successors, (6444), 2360 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 6444 transitions. [2021-08-12 16:03:02,361 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 6444 transitions. Word has length 75 [2021-08-12 16:03:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:02,361 INFO L482 AbstractCegarLoop]: Abstraction has 2361 states and 6444 transitions. [2021-08-12 16:03:02,361 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) [2021-08-12 16:03:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 6444 transitions. [2021-08-12 16:03:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:02,363 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:02,363 INFO L550 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] [2021-08-12 16:03:02,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:02,579 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 30 times [2021-08-12 16:03:02,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:02,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74307220] [2021-08-12 16:03:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:02,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74307220] [2021-08-12 16:03:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74307220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079868179] [2021-08-12 16:03:02,654 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 [2021-08-12 16:03:02,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:03:02,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:02,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079868179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:02,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:02,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:03:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991322915] [2021-08-12 16:03:02,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:02,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:02,800 INFO L87 Difference]: Start difference. First operand 2361 states and 6444 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:03,423 INFO L93 Difference]: Finished difference Result 3806 states and 10383 transitions. [2021-08-12 16:03:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:03:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:03,433 INFO L225 Difference]: With dead ends: 3806 [2021-08-12 16:03:03,433 INFO L226 Difference]: Without dead ends: 3408 [2021-08-12 16:03:03,434 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:03:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-08-12 16:03:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2541. [2021-08-12 16:03:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.7570866141732284) internal successors, (7003), 2540 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7003 transitions. [2021-08-12 16:03:03,558 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7003 transitions. Word has length 75 [2021-08-12 16:03:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:03,558 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7003 transitions. [2021-08-12 16:03:03,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7003 transitions. [2021-08-12 16:03:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:03,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:03,561 INFO L550 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] [2021-08-12 16:03:03,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 16:03:03,777 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 31 times [2021-08-12 16:03:03,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:03,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427974481] [2021-08-12 16:03:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:03,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:03,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427974481] [2021-08-12 16:03:03,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427974481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:03,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864340372] [2021-08-12 16:03:03,859 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 [2021-08-12 16:03:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:04,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864340372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:04,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:04,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:04,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958678219] [2021-08-12 16:03:04,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:04,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:04,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:04,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:04,019 INFO L87 Difference]: Start difference. First operand 2541 states and 7003 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) [2021-08-12 16:03:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:04,636 INFO L93 Difference]: Finished difference Result 3253 states and 9003 transitions. [2021-08-12 16:03:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:04,636 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 [2021-08-12 16:03:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:04,646 INFO L225 Difference]: With dead ends: 3253 [2021-08-12 16:03:04,646 INFO L226 Difference]: Without dead ends: 2636 [2021-08-12 16:03:04,647 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:03:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-08-12 16:03:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2486. [2021-08-12 16:03:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-08-12 16:03:04,748 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-08-12 16:03:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:04,748 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-08-12 16:03:04,748 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) [2021-08-12 16:03:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-08-12 16:03:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:04,751 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:04,751 INFO L550 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] [2021-08-12 16:03:04,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:04,967 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:04,967 INFO L82 PathProgramCache]: Analyzing trace with hash 685387182, now seen corresponding path program 32 times [2021-08-12 16:03:04,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:04,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883626100] [2021-08-12 16:03:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:05,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:05,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883626100] [2021-08-12 16:03:05,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883626100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:05,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311772755] [2021-08-12 16:03:05,079 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 [2021-08-12 16:03:05,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:05,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:05,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311772755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:05,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:05,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-12 16:03:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263523557] [2021-08-12 16:03:05,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:05,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:05,239 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 transitions. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:05,936 INFO L93 Difference]: Finished difference Result 3719 states and 9945 transitions. [2021-08-12 16:03:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:03:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:05,947 INFO L225 Difference]: With dead ends: 3719 [2021-08-12 16:03:05,947 INFO L226 Difference]: Without dead ends: 3242 [2021-08-12 16:03:05,948 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:03:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-08-12 16:03:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2488. [2021-08-12 16:03:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7515078407720144) internal successors, (6843), 2487 states have internal predecessors, (6843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6843 transitions. [2021-08-12 16:03:06,057 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6843 transitions. Word has length 75 [2021-08-12 16:03:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:06,057 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6843 transitions. [2021-08-12 16:03:06,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6843 transitions. [2021-08-12 16:03:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:06,060 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:06,060 INFO L550 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] [2021-08-12 16:03:06,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 16:03:06,277 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -137824918, now seen corresponding path program 33 times [2021-08-12 16:03:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:06,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510572868] [2021-08-12 16:03:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:06,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:06,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510572868] [2021-08-12 16:03:06,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510572868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:06,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719096437] [2021-08-12 16:03:06,357 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 [2021-08-12 16:03:06,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:03:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:03:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:06,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719096437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:06,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:06,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-12 16:03:06,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670643632] [2021-08-12 16:03:06,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:03:06,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:03:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:03:06,553 INFO L87 Difference]: Start difference. First operand 2488 states and 6843 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:07,344 INFO L93 Difference]: Finished difference Result 3569 states and 9389 transitions. [2021-08-12 16:03:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:03:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:03:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:07,354 INFO L225 Difference]: With dead ends: 3569 [2021-08-12 16:03:07,354 INFO L226 Difference]: Without dead ends: 3156 [2021-08-12 16:03:07,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-12 16:03:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-08-12 16:03:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2468. [2021-08-12 16:03:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 2.7576003242805025) internal successors, (6803), 2467 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 6803 transitions. [2021-08-12 16:03:07,463 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 6803 transitions. Word has length 75 [2021-08-12 16:03:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:07,464 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 6803 transitions. [2021-08-12 16:03:07,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 6803 transitions. [2021-08-12 16:03:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:07,466 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:07,466 INFO L550 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] [2021-08-12 16:03:07,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 16:03:07,669 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash -510245734, now seen corresponding path program 34 times [2021-08-12 16:03:07,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:07,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355455919] [2021-08-12 16:03:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:07,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355455919] [2021-08-12 16:03:07,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355455919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346511886] [2021-08-12 16:03:07,765 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 [2021-08-12 16:03:07,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:07,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:03:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:08,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346511886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:08,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:08,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:03:08,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422566734] [2021-08-12 16:03:08,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:08,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:08,005 INFO L87 Difference]: Start difference. First operand 2468 states and 6803 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:03:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:08,804 INFO L93 Difference]: Finished difference Result 3504 states and 9259 transitions. [2021-08-12 16:03:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:03:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 [2021-08-12 16:03:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:08,814 INFO L225 Difference]: With dead ends: 3504 [2021-08-12 16:03:08,814 INFO L226 Difference]: Without dead ends: 3091 [2021-08-12 16:03:08,814 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:03:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-08-12 16:03:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2443. [2021-08-12 16:03:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 2.7653562653562656) internal successors, (6753), 2442 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 6753 transitions. [2021-08-12 16:03:08,917 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 6753 transitions. Word has length 75 [2021-08-12 16:03:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:08,918 INFO L482 AbstractCegarLoop]: Abstraction has 2443 states and 6753 transitions. [2021-08-12 16:03:08,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:03:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 6753 transitions. [2021-08-12 16:03:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:08,920 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:08,920 INFO L550 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] [2021-08-12 16:03:09,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 16:03:09,136 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash -328434196, now seen corresponding path program 35 times [2021-08-12 16:03:09,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:09,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11998264] [2021-08-12 16:03:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:09,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:09,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11998264] [2021-08-12 16:03:09,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11998264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:09,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320594352] [2021-08-12 16:03:09,211 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 [2021-08-12 16:03:09,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:03:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:03:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:09,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320594352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:09,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:09,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-12 16:03:09,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454599416] [2021-08-12 16:03:09,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:03:09,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:03:09,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:03:09,416 INFO L87 Difference]: Start difference. First operand 2443 states and 6753 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:10,180 INFO L93 Difference]: Finished difference Result 3429 states and 9109 transitions. [2021-08-12 16:03:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:03:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:03:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:10,190 INFO L225 Difference]: With dead ends: 3429 [2021-08-12 16:03:10,190 INFO L226 Difference]: Without dead ends: 3016 [2021-08-12 16:03:10,191 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-08-12 16:03:10,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-08-12 16:03:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2418. [2021-08-12 16:03:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7732726520479933) internal successors, (6703), 2417 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6703 transitions. [2021-08-12 16:03:10,292 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6703 transitions. Word has length 75 [2021-08-12 16:03:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:10,293 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6703 transitions. [2021-08-12 16:03:10,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6703 transitions. [2021-08-12 16:03:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:10,295 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:10,295 INFO L550 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] [2021-08-12 16:03:10,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 16:03:10,512 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:10,512 INFO L82 PathProgramCache]: Analyzing trace with hash -24508132, now seen corresponding path program 36 times [2021-08-12 16:03:10,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:10,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524112102] [2021-08-12 16:03:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:10,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:10,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524112102] [2021-08-12 16:03:10,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524112102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:10,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396927028] [2021-08-12 16:03:10,589 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 [2021-08-12 16:03:10,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:03:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:03:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:10,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396927028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:10,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:10,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:03:10,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807349598] [2021-08-12 16:03:10,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:10,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:10,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:10,766 INFO L87 Difference]: Start difference. First operand 2418 states and 6703 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:03:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:11,555 INFO L93 Difference]: Finished difference Result 3354 states and 8959 transitions. [2021-08-12 16:03:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:11,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 [2021-08-12 16:03:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:11,565 INFO L225 Difference]: With dead ends: 3354 [2021-08-12 16:03:11,565 INFO L226 Difference]: Without dead ends: 2941 [2021-08-12 16:03:11,566 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:03:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-08-12 16:03:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2393. [2021-08-12 16:03:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 2.7813545150501673) internal successors, (6653), 2392 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 6653 transitions. [2021-08-12 16:03:11,663 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 6653 transitions. Word has length 75 [2021-08-12 16:03:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:11,664 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 6653 transitions. [2021-08-12 16:03:11,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:03:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 6653 transitions. [2021-08-12 16:03:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:11,666 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:11,666 INFO L550 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] [2021-08-12 16:03:11,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:11,882 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:11,882 INFO L82 PathProgramCache]: Analyzing trace with hash -670670610, now seen corresponding path program 37 times [2021-08-12 16:03:11,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:11,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566156620] [2021-08-12 16:03:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:11,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566156620] [2021-08-12 16:03:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566156620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251214378] [2021-08-12 16:03:11,950 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 [2021-08-12 16:03:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:12,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:03:12,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251214378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:12,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-12 16:03:12,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742059486] [2021-08-12 16:03:12,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:03:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:03:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:03:12,113 INFO L87 Difference]: Start difference. First operand 2393 states and 6653 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:12,803 INFO L93 Difference]: Finished difference Result 3279 states and 8809 transitions. [2021-08-12 16:03:12,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:03:12,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:03:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:12,814 INFO L225 Difference]: With dead ends: 3279 [2021-08-12 16:03:12,814 INFO L226 Difference]: Without dead ends: 2866 [2021-08-12 16:03:12,815 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:03:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-08-12 16:03:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2368. [2021-08-12 16:03:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.7896070975918885) internal successors, (6603), 2367 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6603 transitions. [2021-08-12 16:03:12,936 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6603 transitions. Word has length 75 [2021-08-12 16:03:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:12,936 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6603 transitions. [2021-08-12 16:03:12,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6603 transitions. [2021-08-12 16:03:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:12,939 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:12,939 INFO L550 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] [2021-08-12 16:03:13,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 16:03:13,150 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1917790238, now seen corresponding path program 38 times [2021-08-12 16:03:13,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:13,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557783679] [2021-08-12 16:03:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:13,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557783679] [2021-08-12 16:03:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557783679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852903905] [2021-08-12 16:03:13,226 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 [2021-08-12 16:03:13,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:03:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:03:13,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852903905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:13,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:13,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:03:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430163026] [2021-08-12 16:03:13,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:13,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:13,411 INFO L87 Difference]: Start difference. First operand 2368 states and 6603 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:03:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:14,153 INFO L93 Difference]: Finished difference Result 3204 states and 8659 transitions. [2021-08-12 16:03:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 [2021-08-12 16:03:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:14,164 INFO L225 Difference]: With dead ends: 3204 [2021-08-12 16:03:14,164 INFO L226 Difference]: Without dead ends: 2791 [2021-08-12 16:03:14,165 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:03:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-08-12 16:03:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2343. [2021-08-12 16:03:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.7980358667805296) internal successors, (6553), 2342 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 6553 transitions. [2021-08-12 16:03:14,262 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 6553 transitions. Word has length 75 [2021-08-12 16:03:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:14,262 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 6553 transitions. [2021-08-12 16:03:14,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-08-12 16:03:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 6553 transitions. [2021-08-12 16:03:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:14,264 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:14,264 INFO L550 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] [2021-08-12 16:03:14,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:14,480 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:14,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2118606207, now seen corresponding path program 39 times [2021-08-12 16:03:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:14,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482817820] [2021-08-12 16:03:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:14,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482817820] [2021-08-12 16:03:14,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482817820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773801533] [2021-08-12 16:03:14,551 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 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 [2021-08-12 16:03:14,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:03:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:14,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773801533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:14,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:14,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:14,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888637588] [2021-08-12 16:03:14,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:14,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:14,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:14,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:14,704 INFO L87 Difference]: Start difference. First operand 2343 states and 6553 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) [2021-08-12 16:03:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:15,456 INFO L93 Difference]: Finished difference Result 3493 states and 9651 transitions. [2021-08-12 16:03:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:15,457 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 [2021-08-12 16:03:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:15,467 INFO L225 Difference]: With dead ends: 3493 [2021-08-12 16:03:15,467 INFO L226 Difference]: Without dead ends: 2756 [2021-08-12 16:03:15,469 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-12 16:03:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1634. [2021-08-12 16:03:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.7348438456827924) internal successors, (4466), 1633 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-08-12 16:03:15,577 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-08-12 16:03:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:15,578 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-08-12 16:03:15,578 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) [2021-08-12 16:03:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-08-12 16:03:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:15,579 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:15,580 INFO L550 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] [2021-08-12 16:03:15,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:15,793 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-08-12 16:03:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:15,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305994653] [2021-08-12 16:03:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:15,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305994653] [2021-08-12 16:03:15,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305994653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118393403] [2021-08-12 16:03:15,915 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 [2021-08-12 16:03:15,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:15,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:15,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:16,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118393403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:16,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:16,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:16,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772853954] [2021-08-12 16:03:16,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:16,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:16,094 INFO L87 Difference]: Start difference. First operand 1634 states and 4466 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) [2021-08-12 16:03:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:16,747 INFO L93 Difference]: Finished difference Result 2652 states and 7142 transitions. [2021-08-12 16:03:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:16,747 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 [2021-08-12 16:03:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:16,756 INFO L225 Difference]: With dead ends: 2652 [2021-08-12 16:03:16,756 INFO L226 Difference]: Without dead ends: 2190 [2021-08-12 16:03:16,757 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:03:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-08-12 16:03:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1719. [2021-08-12 16:03:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 2.6984866123399303) internal successors, (4636), 1718 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 4636 transitions. [2021-08-12 16:03:16,863 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 4636 transitions. Word has length 80 [2021-08-12 16:03:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:16,863 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 4636 transitions. [2021-08-12 16:03:16,864 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) [2021-08-12 16:03:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 4636 transitions. [2021-08-12 16:03:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:16,865 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:16,865 INFO L550 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] [2021-08-12 16:03:17,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 16:03:17,081 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-08-12 16:03:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:17,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554089483] [2021-08-12 16:03:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554089483] [2021-08-12 16:03:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554089483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761354105] [2021-08-12 16:03:17,187 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 [2021-08-12 16:03:17,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:17,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:17,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:17,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761354105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:17,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:17,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195689523] [2021-08-12 16:03:17,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:17,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:17,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:17,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:17,366 INFO L87 Difference]: Start difference. First operand 1719 states and 4636 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) [2021-08-12 16:03:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:18,476 INFO L93 Difference]: Finished difference Result 3074 states and 7859 transitions. [2021-08-12 16:03:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:03:18,476 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 [2021-08-12 16:03:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:18,485 INFO L225 Difference]: With dead ends: 3074 [2021-08-12 16:03:18,485 INFO L226 Difference]: Without dead ends: 2676 [2021-08-12 16:03:18,486 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:03:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-08-12 16:03:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1863. [2021-08-12 16:03:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.71374865735768) internal successors, (5053), 1862 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5053 transitions. [2021-08-12 16:03:18,618 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5053 transitions. Word has length 80 [2021-08-12 16:03:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:18,618 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5053 transitions. [2021-08-12 16:03:18,618 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) [2021-08-12 16:03:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5053 transitions. [2021-08-12 16:03:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:18,619 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:18,619 INFO L550 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] [2021-08-12 16:03:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:18,833 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-08-12 16:03:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338403182] [2021-08-12 16:03:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:18,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:18,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338403182] [2021-08-12 16:03:18,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338403182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:18,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099210384] [2021-08-12 16:03:18,934 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 [2021-08-12 16:03:18,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:18,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:19,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099210384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:19,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:19,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:19,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309086768] [2021-08-12 16:03:19,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:19,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:19,101 INFO L87 Difference]: Start difference. First operand 1863 states and 5053 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) [2021-08-12 16:03:20,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:20,345 INFO L93 Difference]: Finished difference Result 3034 states and 7854 transitions. [2021-08-12 16:03:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:20,345 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 [2021-08-12 16:03:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:20,357 INFO L225 Difference]: With dead ends: 3034 [2021-08-12 16:03:20,357 INFO L226 Difference]: Without dead ends: 2636 [2021-08-12 16:03:20,358 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:03:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-08-12 16:03:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1938. [2021-08-12 16:03:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.7248322147651005) internal successors, (5278), 1937 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 5278 transitions. [2021-08-12 16:03:20,504 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 5278 transitions. Word has length 80 [2021-08-12 16:03:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:20,504 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 5278 transitions. [2021-08-12 16:03:20,505 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) [2021-08-12 16:03:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 5278 transitions. [2021-08-12 16:03:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:20,506 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:20,506 INFO L550 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] [2021-08-12 16:03:20,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 16:03:20,723 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:20,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:20,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-08-12 16:03:20,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:20,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724385099] [2021-08-12 16:03:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:20,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:20,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724385099] [2021-08-12 16:03:20,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724385099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:20,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240025042] [2021-08-12 16:03:20,812 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 [2021-08-12 16:03:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:20,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240025042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:20,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:20,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:20,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917539095] [2021-08-12 16:03:20,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:20,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:20,954 INFO L87 Difference]: Start difference. First operand 1938 states and 5278 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) [2021-08-12 16:03:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:22,262 INFO L93 Difference]: Finished difference Result 3084 states and 8029 transitions. [2021-08-12 16:03:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:03:22,262 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 [2021-08-12 16:03:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:22,271 INFO L225 Difference]: With dead ends: 3084 [2021-08-12 16:03:22,271 INFO L226 Difference]: Without dead ends: 2686 [2021-08-12 16:03:22,272 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:03:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-08-12 16:03:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2013. [2021-08-12 16:03:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.735089463220676) internal successors, (5503), 2012 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5503 transitions. [2021-08-12 16:03:22,424 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5503 transitions. Word has length 80 [2021-08-12 16:03:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:22,424 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5503 transitions. [2021-08-12 16:03:22,424 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) [2021-08-12 16:03:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5503 transitions. [2021-08-12 16:03:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:22,426 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:22,426 INFO L550 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] [2021-08-12 16:03:22,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:22,631 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:22,631 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-08-12 16:03:22,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:22,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217470578] [2021-08-12 16:03:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:22,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217470578] [2021-08-12 16:03:22,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217470578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95560623] [2021-08-12 16:03:22,745 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 [2021-08-12 16:03:22,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:22,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95560623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:22,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:22,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:22,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407958628] [2021-08-12 16:03:22,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:22,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:22,897 INFO L87 Difference]: Start difference. First operand 2013 states and 5503 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) [2021-08-12 16:03:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:24,263 INFO L93 Difference]: Finished difference Result 3109 states and 8154 transitions. [2021-08-12 16:03:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:24,263 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 [2021-08-12 16:03:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:24,273 INFO L225 Difference]: With dead ends: 3109 [2021-08-12 16:03:24,274 INFO L226 Difference]: Without dead ends: 2711 [2021-08-12 16:03:24,274 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:03:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-08-12 16:03:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2088. [2021-08-12 16:03:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 2.744609487302348) internal successors, (5728), 2087 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 5728 transitions. [2021-08-12 16:03:24,445 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 5728 transitions. Word has length 80 [2021-08-12 16:03:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:24,445 INFO L482 AbstractCegarLoop]: Abstraction has 2088 states and 5728 transitions. [2021-08-12 16:03:24,445 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) [2021-08-12 16:03:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 5728 transitions. [2021-08-12 16:03:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:24,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:24,448 INFO L550 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] [2021-08-12 16:03:24,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 16:03:24,652 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-08-12 16:03:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:24,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425758467] [2021-08-12 16:03:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:24,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:24,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425758467] [2021-08-12 16:03:24,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425758467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:24,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300527401] [2021-08-12 16:03:24,776 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 [2021-08-12 16:03:24,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:24,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:24,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:03:24,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300527401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:24,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:24,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362868229] [2021-08-12 16:03:24,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:24,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:24,920 INFO L87 Difference]: Start difference. First operand 2088 states and 5728 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) [2021-08-12 16:03:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:26,156 INFO L93 Difference]: Finished difference Result 3134 states and 8279 transitions. [2021-08-12 16:03:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:03:26,156 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 [2021-08-12 16:03:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:26,167 INFO L225 Difference]: With dead ends: 3134 [2021-08-12 16:03:26,168 INFO L226 Difference]: Without dead ends: 2736 [2021-08-12 16:03:26,169 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:03:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-08-12 16:03:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2163. [2021-08-12 16:03:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.7534690101757633) internal successors, (5953), 2162 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 5953 transitions. [2021-08-12 16:03:26,327 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 5953 transitions. Word has length 80 [2021-08-12 16:03:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:26,328 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 5953 transitions. [2021-08-12 16:03:26,328 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) [2021-08-12 16:03:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 5953 transitions. [2021-08-12 16:03:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:26,329 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:26,329 INFO L550 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] [2021-08-12 16:03:26,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 16:03:26,545 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-08-12 16:03:26,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:26,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855294432] [2021-08-12 16:03:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:26,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:26,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855294432] [2021-08-12 16:03:26,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855294432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:26,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963798342] [2021-08-12 16:03:26,674 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 [2021-08-12 16:03:26,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:26,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963798342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:26,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:26,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:26,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709665182] [2021-08-12 16:03:26,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:26,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:26,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:26,823 INFO L87 Difference]: Start difference. First operand 2163 states and 5953 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) [2021-08-12 16:03:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:28,099 INFO L93 Difference]: Finished difference Result 3159 states and 8404 transitions. [2021-08-12 16:03:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:28,099 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 [2021-08-12 16:03:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:28,110 INFO L225 Difference]: With dead ends: 3159 [2021-08-12 16:03:28,110 INFO L226 Difference]: Without dead ends: 2761 [2021-08-12 16:03:28,111 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-08-12 16:03:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2238. [2021-08-12 16:03:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 2.761734465802414) internal successors, (6178), 2237 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 6178 transitions. [2021-08-12 16:03:28,274 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 6178 transitions. Word has length 80 [2021-08-12 16:03:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:28,274 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 6178 transitions. [2021-08-12 16:03:28,274 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) [2021-08-12 16:03:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 6178 transitions. [2021-08-12 16:03:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:28,276 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:28,276 INFO L550 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] [2021-08-12 16:03:28,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 16:03:28,489 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-08-12 16:03:28,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:28,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748892263] [2021-08-12 16:03:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:28,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748892263] [2021-08-12 16:03:28,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748892263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:28,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305484467] [2021-08-12 16:03:28,573 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 [2021-08-12 16:03:28,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:28,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:28,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305484467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:28,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:28,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:28,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302553561] [2021-08-12 16:03:28,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:28,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:28,708 INFO L87 Difference]: Start difference. First operand 2238 states and 6178 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) [2021-08-12 16:03:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:29,873 INFO L93 Difference]: Finished difference Result 3184 states and 8529 transitions. [2021-08-12 16:03:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:29,873 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 [2021-08-12 16:03:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:29,885 INFO L225 Difference]: With dead ends: 3184 [2021-08-12 16:03:29,885 INFO L226 Difference]: Without dead ends: 2786 [2021-08-12 16:03:29,887 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:03:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-08-12 16:03:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2313. [2021-08-12 16:03:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.769463667820069) internal successors, (6403), 2312 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6403 transitions. [2021-08-12 16:03:30,053 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6403 transitions. Word has length 80 [2021-08-12 16:03:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:30,054 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6403 transitions. [2021-08-12 16:03:30,054 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) [2021-08-12 16:03:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6403 transitions. [2021-08-12 16:03:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:30,056 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:30,056 INFO L550 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] [2021-08-12 16:03:30,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 16:03:30,269 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-08-12 16:03:30,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:30,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43694356] [2021-08-12 16:03:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:30,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:30,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43694356] [2021-08-12 16:03:30,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43694356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:30,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937987285] [2021-08-12 16:03:30,394 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 [2021-08-12 16:03:30,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:30,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:30,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:03:30,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:30,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937987285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:30,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:30,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109426278] [2021-08-12 16:03:30,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:30,553 INFO L87 Difference]: Start difference. First operand 2313 states and 6403 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) [2021-08-12 16:03:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:31,778 INFO L93 Difference]: Finished difference Result 3269 states and 8819 transitions. [2021-08-12 16:03:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:31,779 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 [2021-08-12 16:03:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:31,789 INFO L225 Difference]: With dead ends: 3269 [2021-08-12 16:03:31,789 INFO L226 Difference]: Without dead ends: 2871 [2021-08-12 16:03:31,790 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-08-12 16:03:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2388. [2021-08-12 16:03:31,945 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) [2021-08-12 16:03:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-08-12 16:03:31,957 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-08-12 16:03:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:31,957 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-08-12 16:03:31,957 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) [2021-08-12 16:03:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-08-12 16:03:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:31,959 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:31,959 INFO L550 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] [2021-08-12 16:03:32,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:32,176 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-08-12 16:03:32,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:32,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247446063] [2021-08-12 16:03:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:32,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:32,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247446063] [2021-08-12 16:03:32,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247446063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:32,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781367041] [2021-08-12 16:03:32,253 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 [2021-08-12 16:03:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:32,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781367041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:32,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:32,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:32,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989847918] [2021-08-12 16:03:32,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:32,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:32,395 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) [2021-08-12 16:03:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:33,520 INFO L93 Difference]: Finished difference Result 4036 states and 10993 transitions. [2021-08-12 16:03:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:33,521 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 [2021-08-12 16:03:33,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:33,532 INFO L225 Difference]: With dead ends: 4036 [2021-08-12 16:03:33,532 INFO L226 Difference]: Without dead ends: 3638 [2021-08-12 16:03:33,533 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-08-12 16:03:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-08-12 16:03:33,677 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) [2021-08-12 16:03:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-08-12 16:03:33,690 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-08-12 16:03:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:33,690 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-08-12 16:03:33,690 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) [2021-08-12 16:03:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-08-12 16:03:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:33,692 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:33,692 INFO L550 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] [2021-08-12 16:03:33,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 16:03:33,896 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-08-12 16:03:33,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:33,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778415224] [2021-08-12 16:03:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:34,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778415224] [2021-08-12 16:03:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778415224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498586470] [2021-08-12 16:03:34,012 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 [2021-08-12 16:03:34,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:34,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498586470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:34,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:34,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 16:03:34,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083951856] [2021-08-12 16:03:34,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:34,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:34,173 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:35,423 INFO L93 Difference]: Finished difference Result 3979 states and 10981 transitions. [2021-08-12 16:03:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:03:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:35,439 INFO L225 Difference]: With dead ends: 3979 [2021-08-12 16:03:35,439 INFO L226 Difference]: Without dead ends: 3276 [2021-08-12 16:03:35,440 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:03:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-08-12 16:03:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-08-12 16:03:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:35,597 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-08-12 16:03:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:35,599 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:35,599 INFO L550 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] [2021-08-12 16:03:35,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:35,815 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-08-12 16:03:35,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:35,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777277461] [2021-08-12 16:03:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:35,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:35,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777277461] [2021-08-12 16:03:35,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777277461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:35,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631678405] [2021-08-12 16:03:35,920 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 [2021-08-12 16:03:35,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:35,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:36,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631678405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:36,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:36,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:36,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395439592] [2021-08-12 16:03:36,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:36,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:36,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:36,085 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:37,473 INFO L93 Difference]: Finished difference Result 3574 states and 9609 transitions. [2021-08-12 16:03:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:37,484 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:03:37,484 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:03:37,485 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:03:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-08-12 16:03:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:37,668 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:37,668 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:37,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:37,670 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:37,670 INFO L550 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] [2021-08-12 16:03:37,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:37,885 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-08-12 16:03:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:37,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997372858] [2021-08-12 16:03:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:38,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:38,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997372858] [2021-08-12 16:03:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997372858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:38,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756299419] [2021-08-12 16:03:38,039 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 [2021-08-12 16:03:38,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:38,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756299419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:38,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:38,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859798575] [2021-08-12 16:03:38,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:38,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:38,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:38,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:38,213 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:40,009 INFO L93 Difference]: Finished difference Result 3769 states and 9999 transitions. [2021-08-12 16:03:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:40,023 INFO L225 Difference]: With dead ends: 3769 [2021-08-12 16:03:40,023 INFO L226 Difference]: Without dead ends: 3371 [2021-08-12 16:03:40,024 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-08-12 16:03:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-08-12 16:03:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:40,218 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:40,219 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:40,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:40,221 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:40,221 INFO L550 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] [2021-08-12 16:03:40,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:40,437 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-08-12 16:03:40,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:40,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994891515] [2021-08-12 16:03:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:40,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994891515] [2021-08-12 16:03:40,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994891515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737883202] [2021-08-12 16:03:40,537 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 [2021-08-12 16:03:40,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:40,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:40,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737883202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:40,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:40,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436420764] [2021-08-12 16:03:40,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:40,722 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:42,526 INFO L93 Difference]: Finished difference Result 3724 states and 9909 transitions. [2021-08-12 16:03:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:42,542 INFO L225 Difference]: With dead ends: 3724 [2021-08-12 16:03:42,542 INFO L226 Difference]: Without dead ends: 3326 [2021-08-12 16:03:42,543 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-08-12 16:03:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-08-12 16:03:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:42,737 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:42,737 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:42,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:42,739 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:42,739 INFO L550 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] [2021-08-12 16:03:42,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:42,955 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-08-12 16:03:42,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:42,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237393710] [2021-08-12 16:03:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:43,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:43,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237393710] [2021-08-12 16:03:43,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237393710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:43,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928968472] [2021-08-12 16:03:43,063 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 [2021-08-12 16:03:43,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:43,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:43,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928968472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:43,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:43,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:43,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372039360] [2021-08-12 16:03:43,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:43,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:43,252 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:45,092 INFO L93 Difference]: Finished difference Result 3674 states and 9809 transitions. [2021-08-12 16:03:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:45,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:45,104 INFO L225 Difference]: With dead ends: 3674 [2021-08-12 16:03:45,104 INFO L226 Difference]: Without dead ends: 3276 [2021-08-12 16:03:45,105 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:03:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-08-12 16:03:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-08-12 16:03:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:45,302 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:45,302 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:45,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:45,304 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:45,304 INFO L550 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] [2021-08-12 16:03:45,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 16:03:45,520 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-08-12 16:03:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:45,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682430495] [2021-08-12 16:03:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:45,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:45,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682430495] [2021-08-12 16:03:45,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682430495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:45,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537922436] [2021-08-12 16:03:45,615 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:45,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537922436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:45,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:45,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:45,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550294952] [2021-08-12 16:03:45,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:45,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:45,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:45,774 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:47,495 INFO L93 Difference]: Finished difference Result 3624 states and 9709 transitions. [2021-08-12 16:03:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:47,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:47,508 INFO L225 Difference]: With dead ends: 3624 [2021-08-12 16:03:47,508 INFO L226 Difference]: Without dead ends: 3226 [2021-08-12 16:03:47,509 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:03:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-08-12 16:03:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-08-12 16:03:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:47,733 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:47,733 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:47,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:47,735 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:47,735 INFO L550 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] [2021-08-12 16:03:47,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:47,951 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-08-12 16:03:47,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:47,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677310163] [2021-08-12 16:03:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:48,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:48,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677310163] [2021-08-12 16:03:48,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677310163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:48,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479199033] [2021-08-12 16:03:48,049 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:48,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:48,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:48,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479199033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:48,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:48,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:48,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076486281] [2021-08-12 16:03:48,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:48,224 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:49,923 INFO L93 Difference]: Finished difference Result 3574 states and 9609 transitions. [2021-08-12 16:03:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:03:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:49,938 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:03:49,938 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:03:49,939 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:03:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:03:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-08-12 16:03:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:50,142 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:50,142 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:50,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:50,145 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:50,145 INFO L550 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] [2021-08-12 16:03:50,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 16:03:50,361 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-08-12 16:03:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:50,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131378180] [2021-08-12 16:03:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:50,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131378180] [2021-08-12 16:03:50,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131378180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521998024] [2021-08-12 16:03:50,450 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:50,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:03:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:50,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521998024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:50,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:50,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:50,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102424962] [2021-08-12 16:03:50,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:50,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:50,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:50,612 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:52,212 INFO L93 Difference]: Finished difference Result 3524 states and 9509 transitions. [2021-08-12 16:03:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:03:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:52,226 INFO L225 Difference]: With dead ends: 3524 [2021-08-12 16:03:52,226 INFO L226 Difference]: Without dead ends: 3126 [2021-08-12 16:03:52,227 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:03:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-08-12 16:03:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-08-12 16:03:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:52,423 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:52,423 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:52,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:52,425 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:52,426 INFO L550 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] [2021-08-12 16:03:52,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:52,642 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-08-12 16:03:52,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:52,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504311761] [2021-08-12 16:03:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:52,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504311761] [2021-08-12 16:03:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504311761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435637214] [2021-08-12 16:03:52,735 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:52,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:52,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:52,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435637214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:52,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:52,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454940980] [2021-08-12 16:03:52,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:52,940 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:54,599 INFO L93 Difference]: Finished difference Result 3534 states and 9559 transitions. [2021-08-12 16:03:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:03:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:54,612 INFO L225 Difference]: With dead ends: 3534 [2021-08-12 16:03:54,613 INFO L226 Difference]: Without dead ends: 3136 [2021-08-12 16:03:54,614 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:03:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-08-12 16:03:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-08-12 16:03:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-08-12 16:03:54,844 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-08-12 16:03:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:54,844 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-08-12 16:03:54,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-08-12 16:03:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:54,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:54,846 INFO L550 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] [2021-08-12 16:03:55,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:55,062 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-08-12 16:03:55,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:55,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064668944] [2021-08-12 16:03:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:55,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:55,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064668944] [2021-08-12 16:03:55,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064668944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:55,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453906015] [2021-08-12 16:03:55,148 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:55,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:55,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:55,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453906015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:55,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:55,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514829503] [2021-08-12 16:03:55,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:55,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:55,316 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:56,773 INFO L93 Difference]: Finished difference Result 4276 states and 11683 transitions. [2021-08-12 16:03:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:03:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:56,816 INFO L225 Difference]: With dead ends: 4276 [2021-08-12 16:03:56,828 INFO L226 Difference]: Without dead ends: 3878 [2021-08-12 16:03:56,830 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:03:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-08-12 16:03:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-08-12 16:03:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-08-12 16:03:57,081 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-08-12 16:03:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:57,081 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-08-12 16:03:57,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-08-12 16:03:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:57,083 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:57,083 INFO L550 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] [2021-08-12 16:03:57,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:57,299 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-08-12 16:03:57,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:57,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740714096] [2021-08-12 16:03:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:57,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:57,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740714096] [2021-08-12 16:03:57,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740714096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:57,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499880468] [2021-08-12 16:03:57,398 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:57,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:03:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:57,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499880468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:57,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:57,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873317110] [2021-08-12 16:03:57,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:57,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:57,630 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:59,262 INFO L93 Difference]: Finished difference Result 4144 states and 11476 transitions. [2021-08-12 16:03:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:03:59,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2021-08-12 16:03:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:59,280 INFO L225 Difference]: With dead ends: 4144 [2021-08-12 16:03:59,280 INFO L226 Difference]: Without dead ends: 3441 [2021-08-12 16:03:59,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:03:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-08-12 16:03:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-08-12 16:03:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-08-12 16:03:59,464 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-08-12 16:03:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:59,464 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-08-12 16:03:59,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-08-12 16:03:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:03:59,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:59,482 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:59,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:59,696 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-08-12 16:03:59,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:59,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893505769] [2021-08-12 16:03:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:59,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:59,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893505769] [2021-08-12 16:03:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893505769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:59,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004758072] [2021-08-12 16:03:59,837 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:59,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:03:59,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:00,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004758072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:00,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:00,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-08-12 16:04:00,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35135341] [2021-08-12 16:04:00,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:04:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:04:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:04:00,051 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:01,348 INFO L93 Difference]: Finished difference Result 2992 states and 8032 transitions. [2021-08-12 16:04:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:04:01,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:01,361 INFO L225 Difference]: With dead ends: 2992 [2021-08-12 16:04:01,361 INFO L226 Difference]: Without dead ends: 2530 [2021-08-12 16:04:01,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-08-12 16:04:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-08-12 16:04:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-08-12 16:04:01,588 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-08-12 16:04:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:01,588 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-08-12 16:04:01,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-08-12 16:04:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:01,590 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:01,590 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:01,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-12 16:04:01,806 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-08-12 16:04:01,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:01,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525936453] [2021-08-12 16:04:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:01,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:01,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525936453] [2021-08-12 16:04:01,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525936453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:01,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158218142] [2021-08-12 16:04:01,922 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:01,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:04:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:01,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:02,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158218142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:02,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:02,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:02,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257384946] [2021-08-12 16:04:02,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:02,106 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:04,618 INFO L93 Difference]: Finished difference Result 3514 states and 8949 transitions. [2021-08-12 16:04:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:04:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:04,631 INFO L225 Difference]: With dead ends: 3514 [2021-08-12 16:04:04,631 INFO L226 Difference]: Without dead ends: 3116 [2021-08-12 16:04:04,632 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:04:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-08-12 16:04:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-08-12 16:04:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-08-12 16:04:04,917 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-08-12 16:04:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:04,917 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-08-12 16:04:04,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-08-12 16:04:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:04,919 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:04,919 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:05,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:05,135 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-08-12 16:04:05,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:05,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765044496] [2021-08-12 16:04:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:05,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:05,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765044496] [2021-08-12 16:04:05,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765044496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:05,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451255334] [2021-08-12 16:04:05,319 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:05,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:04:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:05,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451255334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:05,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:05,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-12 16:04:05,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81031763] [2021-08-12 16:04:05,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:05,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:05,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:05,566 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:08,192 INFO L93 Difference]: Finished difference Result 3474 states and 8944 transitions. [2021-08-12 16:04:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:04:08,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:08,205 INFO L225 Difference]: With dead ends: 3474 [2021-08-12 16:04:08,205 INFO L226 Difference]: Without dead ends: 3076 [2021-08-12 16:04:08,206 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:04:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-08-12 16:04:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-08-12 16:04:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-08-12 16:04:08,489 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-08-12 16:04:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:08,490 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-08-12 16:04:08,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-08-12 16:04:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:08,492 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:08,492 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:08,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:08,708 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-08-12 16:04:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:08,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969025862] [2021-08-12 16:04:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:08,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969025862] [2021-08-12 16:04:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969025862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977854601] [2021-08-12 16:04:08,820 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:08,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:04:08,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:08,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977854601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:08,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:08,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773318189] [2021-08-12 16:04:08,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:08,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:08,994 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:11,627 INFO L93 Difference]: Finished difference Result 3524 states and 9119 transitions. [2021-08-12 16:04:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:04:11,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:11,640 INFO L225 Difference]: With dead ends: 3524 [2021-08-12 16:04:11,640 INFO L226 Difference]: Without dead ends: 3126 [2021-08-12 16:04:11,641 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:04:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-08-12 16:04:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-08-12 16:04:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-08-12 16:04:11,927 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-08-12 16:04:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:11,927 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-08-12 16:04:11,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-08-12 16:04:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:11,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:11,930 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:12,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-12 16:04:12,146 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-08-12 16:04:12,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:12,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412213807] [2021-08-12 16:04:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:12,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:12,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412213807] [2021-08-12 16:04:12,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412213807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:12,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598842290] [2021-08-12 16:04:12,262 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:12,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:04:12,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:12,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:12,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598842290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:12,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:12,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-12 16:04:12,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242250944] [2021-08-12 16:04:12,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:12,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:12,447 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:15,100 INFO L93 Difference]: Finished difference Result 3549 states and 9244 transitions. [2021-08-12 16:04:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:04:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:15,115 INFO L225 Difference]: With dead ends: 3549 [2021-08-12 16:04:15,115 INFO L226 Difference]: Without dead ends: 3151 [2021-08-12 16:04:15,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-08-12 16:04:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-08-12 16:04:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-08-12 16:04:15,487 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-08-12 16:04:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:15,487 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-08-12 16:04:15,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-08-12 16:04:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:15,489 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:15,489 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:15,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:15,710 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:15,710 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-08-12 16:04:15,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:15,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786929981] [2021-08-12 16:04:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:15,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:15,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786929981] [2021-08-12 16:04:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786929981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927651029] [2021-08-12 16:04:15,812 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:15,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:04:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:15,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927651029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:15,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:15,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:15,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115845055] [2021-08-12 16:04:15,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:15,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:15,976 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:18,472 INFO L93 Difference]: Finished difference Result 3574 states and 9369 transitions. [2021-08-12 16:04:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:04:18,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:18,487 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:04:18,487 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:04:18,488 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:04:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:04:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-08-12 16:04:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-08-12 16:04:18,777 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-08-12 16:04:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:18,777 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-08-12 16:04:18,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-08-12 16:04:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:18,779 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:18,779 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:18,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-12 16:04:18,995 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-08-12 16:04:18,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:18,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732169968] [2021-08-12 16:04:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:19,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:19,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732169968] [2021-08-12 16:04:19,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732169968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:19,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090573113] [2021-08-12 16:04:19,101 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:19,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:19,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090573113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:19,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:19,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-12 16:04:19,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859099202] [2021-08-12 16:04:19,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:19,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:19,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:19,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:19,280 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:21,865 INFO L93 Difference]: Finished difference Result 3599 states and 9494 transitions. [2021-08-12 16:04:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:04:21,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:21,878 INFO L225 Difference]: With dead ends: 3599 [2021-08-12 16:04:21,878 INFO L226 Difference]: Without dead ends: 3201 [2021-08-12 16:04:21,879 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:04:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-08-12 16:04:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-08-12 16:04:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-08-12 16:04:22,184 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-08-12 16:04:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:22,184 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-08-12 16:04:22,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-08-12 16:04:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:22,186 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:22,186 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:22,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-12 16:04:22,402 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-08-12 16:04:22,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:22,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407045831] [2021-08-12 16:04:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:22,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:22,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407045831] [2021-08-12 16:04:22,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407045831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:22,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61042784] [2021-08-12 16:04:22,502 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:22,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:04:22,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:22,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61042784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:22,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:22,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012563456] [2021-08-12 16:04:22,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:22,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:22,667 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:25,066 INFO L93 Difference]: Finished difference Result 3624 states and 9619 transitions. [2021-08-12 16:04:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:04:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:25,080 INFO L225 Difference]: With dead ends: 3624 [2021-08-12 16:04:25,080 INFO L226 Difference]: Without dead ends: 3226 [2021-08-12 16:04:25,081 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-08-12 16:04:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-08-12 16:04:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-08-12 16:04:25,391 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-08-12 16:04:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:25,391 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-08-12 16:04:25,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-08-12 16:04:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:25,393 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:25,393 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:25,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:25,609 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-08-12 16:04:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:25,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058459310] [2021-08-12 16:04:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:25,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:25,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058459310] [2021-08-12 16:04:25,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058459310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:25,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488759041] [2021-08-12 16:04:25,710 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:25,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:04:25,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:25,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:04:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488759041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:25,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:25,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-12 16:04:25,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079386951] [2021-08-12 16:04:25,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:25,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:25,889 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:28,266 INFO L93 Difference]: Finished difference Result 3649 states and 9744 transitions. [2021-08-12 16:04:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:04:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:28,280 INFO L225 Difference]: With dead ends: 3649 [2021-08-12 16:04:28,280 INFO L226 Difference]: Without dead ends: 3251 [2021-08-12 16:04:28,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=376, Invalid=1264, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:04:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-08-12 16:04:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-08-12 16:04:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-08-12 16:04:28,625 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-08-12 16:04:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:28,626 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-08-12 16:04:28,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-08-12 16:04:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:28,628 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:28,628 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:28,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:28,844 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-08-12 16:04:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:28,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150525808] [2021-08-12 16:04:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:28,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:28,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150525808] [2021-08-12 16:04:28,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150525808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:28,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470384619] [2021-08-12 16:04:28,940 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:28,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:04:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470384619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:29,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:29,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406505640] [2021-08-12 16:04:29,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:29,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:29,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:29,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:29,097 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:31,377 INFO L93 Difference]: Finished difference Result 3719 states and 9989 transitions. [2021-08-12 16:04:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:04:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:31,392 INFO L225 Difference]: With dead ends: 3719 [2021-08-12 16:04:31,392 INFO L226 Difference]: Without dead ends: 3321 [2021-08-12 16:04:31,393 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:04:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-08-12 16:04:31,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-08-12 16:04:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-08-12 16:04:31,699 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-08-12 16:04:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:31,699 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-08-12 16:04:31,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-08-12 16:04:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:31,702 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:31,702 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:31,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:31,919 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-08-12 16:04:31,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:31,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151452811] [2021-08-12 16:04:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:32,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:32,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151452811] [2021-08-12 16:04:32,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151452811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:32,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112646271] [2021-08-12 16:04:32,015 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:32,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:04:32,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:32,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:32,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112646271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:32,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:32,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-12 16:04:32,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526981037] [2021-08-12 16:04:32,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:32,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:32,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:32,192 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:34,530 INFO L93 Difference]: Finished difference Result 4297 states and 11743 transitions. [2021-08-12 16:04:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:04:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:34,546 INFO L225 Difference]: With dead ends: 4297 [2021-08-12 16:04:34,546 INFO L226 Difference]: Without dead ends: 3546 [2021-08-12 16:04:34,547 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 447.2ms TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:04:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-08-12 16:04:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-08-12 16:04:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-08-12 16:04:34,849 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-08-12 16:04:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:34,849 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-08-12 16:04:34,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-08-12 16:04:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:34,851 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:34,851 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:35,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:35,067 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-08-12 16:04:35,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:35,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357883518] [2021-08-12 16:04:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:35,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357883518] [2021-08-12 16:04:35,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357883518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168702377] [2021-08-12 16:04:35,160 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:35,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:04:35,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:35,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:35,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168702377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:35,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:35,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:35,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732211598] [2021-08-12 16:04:35,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:35,426 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:37,539 INFO L93 Difference]: Finished difference Result 4526 states and 12333 transitions. [2021-08-12 16:04:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:04:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:37,555 INFO L225 Difference]: With dead ends: 4526 [2021-08-12 16:04:37,555 INFO L226 Difference]: Without dead ends: 4128 [2021-08-12 16:04:37,556 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:04:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-08-12 16:04:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-08-12 16:04:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-08-12 16:04:37,860 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-08-12 16:04:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:37,861 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-08-12 16:04:37,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-08-12 16:04:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:37,863 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:37,863 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:38,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:38,079 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-08-12 16:04:38,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:38,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727082639] [2021-08-12 16:04:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:38,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:38,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727082639] [2021-08-12 16:04:38,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727082639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:38,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704283400] [2021-08-12 16:04:38,173 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:38,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704283400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:38,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:38,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:38,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060720723] [2021-08-12 16:04:38,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:38,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:38,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:38,334 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:40,452 INFO L93 Difference]: Finished difference Result 4013 states and 11033 transitions. [2021-08-12 16:04:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:04:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:40,467 INFO L225 Difference]: With dead ends: 4013 [2021-08-12 16:04:40,468 INFO L226 Difference]: Without dead ends: 3306 [2021-08-12 16:04:40,469 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:04:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-08-12 16:04:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-08-12 16:04:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-08-12 16:04:40,758 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-08-12 16:04:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:40,758 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-08-12 16:04:40,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-08-12 16:04:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:40,760 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:40,760 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:40,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-12 16:04:40,975 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-08-12 16:04:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:40,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938819174] [2021-08-12 16:04:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:41,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938819174] [2021-08-12 16:04:41,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938819174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635894118] [2021-08-12 16:04:41,103 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:41,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:04:41,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:41,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635894118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:41,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:41,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895054835] [2021-08-12 16:04:41,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:41,264 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:04:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:43,871 INFO L93 Difference]: Finished difference Result 3259 states and 8529 transitions. [2021-08-12 16:04:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:04:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-08-12 16:04:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:43,884 INFO L225 Difference]: With dead ends: 3259 [2021-08-12 16:04:43,884 INFO L226 Difference]: Without dead ends: 2861 [2021-08-12 16:04:43,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:04:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-08-12 16:04:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-08-12 16:04:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-08-12 16:04:44,213 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-08-12 16:04:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:44,213 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-08-12 16:04:44,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:04:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-08-12 16:04:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:44,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:44,220 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:44,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:44,437 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-08-12 16:04:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:44,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592456558] [2021-08-12 16:04:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:44,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592456558] [2021-08-12 16:04:44,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592456558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704620828] [2021-08-12 16:04:44,604 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:44,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:04:44,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:44,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704620828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:44,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:44,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:04:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719103517] [2021-08-12 16:04:44,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:44,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:44,785 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:48,340 INFO L93 Difference]: Finished difference Result 3579 states and 9244 transitions. [2021-08-12 16:04:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:04:48,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:48,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:48,354 INFO L225 Difference]: With dead ends: 3579 [2021-08-12 16:04:48,355 INFO L226 Difference]: Without dead ends: 3181 [2021-08-12 16:04:48,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-08-12 16:04:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-08-12 16:04:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-08-12 16:04:48,710 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-08-12 16:04:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:48,710 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-08-12 16:04:48,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-08-12 16:04:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:48,712 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:48,712 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:48,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:48,928 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-08-12 16:04:48,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:48,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761857864] [2021-08-12 16:04:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:49,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761857864] [2021-08-12 16:04:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761857864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827055241] [2021-08-12 16:04:49,048 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:49,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:04:49,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:49,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827055241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:49,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:49,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:49,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880818193] [2021-08-12 16:04:49,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:49,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:49,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:49,207 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:04:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:52,829 INFO L93 Difference]: Finished difference Result 3609 states and 9379 transitions. [2021-08-12 16:04:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:04:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-08-12 16:04:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:52,847 INFO L225 Difference]: With dead ends: 3609 [2021-08-12 16:04:52,847 INFO L226 Difference]: Without dead ends: 3211 [2021-08-12 16:04:52,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-08-12 16:04:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-08-12 16:04:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-08-12 16:04:53,219 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-08-12 16:04:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:53,220 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-08-12 16:04:53,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:04:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-08-12 16:04:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:53,222 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:53,222 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:53,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-12 16:04:53,437 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-08-12 16:04:53,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:53,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486196221] [2021-08-12 16:04:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:53,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486196221] [2021-08-12 16:04:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486196221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062625379] [2021-08-12 16:04:53,566 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:53,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:04:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:53,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062625379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:53,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:53,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:04:53,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136243616] [2021-08-12 16:04:53,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:53,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:53,750 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:57,357 INFO L93 Difference]: Finished difference Result 3634 states and 9504 transitions. [2021-08-12 16:04:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:04:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:57,374 INFO L225 Difference]: With dead ends: 3634 [2021-08-12 16:04:57,375 INFO L226 Difference]: Without dead ends: 3236 [2021-08-12 16:04:57,375 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:04:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-08-12 16:04:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-08-12 16:04:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-08-12 16:04:57,747 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-08-12 16:04:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:57,747 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-08-12 16:04:57,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-08-12 16:04:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:57,749 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:57,750 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:57,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:57,965 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-08-12 16:04:57,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:57,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048315230] [2021-08-12 16:04:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:58,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:58,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048315230] [2021-08-12 16:04:58,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048315230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:58,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966661767] [2021-08-12 16:04:58,089 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:58,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:04:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:58,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966661767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:58,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:58,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706015082] [2021-08-12 16:04:58,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:58,264 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:01,764 INFO L93 Difference]: Finished difference Result 3659 states and 9629 transitions. [2021-08-12 16:05:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:05:01,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-08-12 16:05:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:01,781 INFO L225 Difference]: With dead ends: 3659 [2021-08-12 16:05:01,782 INFO L226 Difference]: Without dead ends: 3261 [2021-08-12 16:05:01,783 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:05:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-08-12 16:05:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-08-12 16:05:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-08-12 16:05:02,196 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-08-12 16:05:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:02,197 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-08-12 16:05:02,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-08-12 16:05:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:02,199 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:02,199 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:02,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:02,416 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-08-12 16:05:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:02,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473447089] [2021-08-12 16:05:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:02,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473447089] [2021-08-12 16:05:02,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473447089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809021954] [2021-08-12 16:05:02,537 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:02,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:02,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809021954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:02,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:02,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:02,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645410018] [2021-08-12 16:05:02,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:02,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:02,720 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:06,192 INFO L93 Difference]: Finished difference Result 3684 states and 9754 transitions. [2021-08-12 16:05:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:05:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:06,215 INFO L225 Difference]: With dead ends: 3684 [2021-08-12 16:05:06,216 INFO L226 Difference]: Without dead ends: 3286 [2021-08-12 16:05:06,217 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:05:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-08-12 16:05:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-08-12 16:05:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-08-12 16:05:06,617 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-08-12 16:05:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:06,617 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-08-12 16:05:06,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-08-12 16:05:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:06,619 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:06,619 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:06,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:06,836 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-08-12 16:05:06,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:06,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333501462] [2021-08-12 16:05:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:06,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:06,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333501462] [2021-08-12 16:05:06,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333501462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:06,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755439081] [2021-08-12 16:05:06,947 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:07,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:05:07,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:07,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755439081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:07,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:07,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:05:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067318553] [2021-08-12 16:05:07,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:05:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:05:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:05:07,113 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:10,371 INFO L93 Difference]: Finished difference Result 3709 states and 9879 transitions. [2021-08-12 16:05:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:05:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-08-12 16:05:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:10,388 INFO L225 Difference]: With dead ends: 3709 [2021-08-12 16:05:10,389 INFO L226 Difference]: Without dead ends: 3311 [2021-08-12 16:05:10,389 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:05:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-08-12 16:05:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-08-12 16:05:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-08-12 16:05:10,765 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-08-12 16:05:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:10,765 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-08-12 16:05:10,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-08-12 16:05:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:10,767 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:10,768 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:10,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-12 16:05:10,984 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-08-12 16:05:10,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:10,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669265419] [2021-08-12 16:05:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:11,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669265419] [2021-08-12 16:05:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669265419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036915490] [2021-08-12 16:05:11,098 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:11,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:05:11,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 16:05:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:11,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036915490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:11,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:11,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:11,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728137802] [2021-08-12 16:05:11,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:11,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:11,327 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:14,832 INFO L93 Difference]: Finished difference Result 3734 states and 10004 transitions. [2021-08-12 16:05:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:05:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:14,850 INFO L225 Difference]: With dead ends: 3734 [2021-08-12 16:05:14,850 INFO L226 Difference]: Without dead ends: 3336 [2021-08-12 16:05:14,851 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:05:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-08-12 16:05:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-08-12 16:05:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-08-12 16:05:15,293 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-08-12 16:05:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:15,293 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-08-12 16:05:15,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-08-12 16:05:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:15,296 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:15,296 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:15,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:15,513 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-08-12 16:05:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:15,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898463180] [2021-08-12 16:05:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:15,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:15,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898463180] [2021-08-12 16:05:15,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898463180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:15,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504605600] [2021-08-12 16:05:15,652 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:15,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:05:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:15,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:15,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504605600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:15,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:15,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:05:15,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841233269] [2021-08-12 16:05:15,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:05:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:05:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:05:15,811 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:18,842 INFO L93 Difference]: Finished difference Result 3759 states and 10129 transitions. [2021-08-12 16:05:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:05:18,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-08-12 16:05:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:18,864 INFO L225 Difference]: With dead ends: 3759 [2021-08-12 16:05:18,864 INFO L226 Difference]: Without dead ends: 3361 [2021-08-12 16:05:18,865 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:05:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-08-12 16:05:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-08-12 16:05:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-08-12 16:05:19,256 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-08-12 16:05:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:19,256 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-08-12 16:05:19,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-08-12 16:05:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:19,259 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:19,259 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:19,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-12 16:05:19,473 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-08-12 16:05:19,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:19,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950825017] [2021-08-12 16:05:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:19,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:19,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950825017] [2021-08-12 16:05:19,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950825017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:19,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836846480] [2021-08-12 16:05:19,603 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:19,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:05:19,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:19,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:19,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836846480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:19,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:19,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:19,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74847116] [2021-08-12 16:05:19,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:19,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:19,782 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:22,842 INFO L93 Difference]: Finished difference Result 3844 states and 10419 transitions. [2021-08-12 16:05:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:05:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:22,862 INFO L225 Difference]: With dead ends: 3844 [2021-08-12 16:05:22,862 INFO L226 Difference]: Without dead ends: 3446 [2021-08-12 16:05:22,863 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:05:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-08-12 16:05:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-08-12 16:05:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-08-12 16:05:23,253 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-08-12 16:05:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:23,253 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-08-12 16:05:23,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-08-12 16:05:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:23,256 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:23,256 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:23,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-12 16:05:23,472 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-08-12 16:05:23,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:23,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709099147] [2021-08-12 16:05:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709099147] [2021-08-12 16:05:23,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709099147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292813777] [2021-08-12 16:05:23,576 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:23,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:05:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:23,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292813777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:23,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:23,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:05:23,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763511962] [2021-08-12 16:05:23,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:05:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:05:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:05:23,741 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:26,490 INFO L93 Difference]: Finished difference Result 4586 states and 12543 transitions. [2021-08-12 16:05:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:05:26,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-08-12 16:05:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:26,507 INFO L225 Difference]: With dead ends: 4586 [2021-08-12 16:05:26,507 INFO L226 Difference]: Without dead ends: 4188 [2021-08-12 16:05:26,508 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:05:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-08-12 16:05:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-08-12 16:05:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-08-12 16:05:26,925 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-08-12 16:05:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:26,925 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-08-12 16:05:26,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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) [2021-08-12 16:05:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-08-12 16:05:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:26,928 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:26,928 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:27,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:27,144 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:27,144 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-08-12 16:05:27,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:27,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268994136] [2021-08-12 16:05:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:27,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268994136] [2021-08-12 16:05:27,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268994136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319506119] [2021-08-12 16:05:27,249 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:27,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319506119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:27,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:27,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:27,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452575696] [2021-08-12 16:05:27,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:27,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:27,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:27,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:27,419 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:30,102 INFO L93 Difference]: Finished difference Result 4048 states and 11193 transitions. [2021-08-12 16:05:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:05:30,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:30,125 INFO L225 Difference]: With dead ends: 4048 [2021-08-12 16:05:30,125 INFO L226 Difference]: Without dead ends: 3431 [2021-08-12 16:05:30,126 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:05:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-08-12 16:05:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-08-12 16:05:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-08-12 16:05:30,538 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-08-12 16:05:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:30,538 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-08-12 16:05:30,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-08-12 16:05:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:30,540 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:30,540 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:30,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:30,757 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-08-12 16:05:30,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:30,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49249207] [2021-08-12 16:05:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:30,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:30,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49249207] [2021-08-12 16:05:30,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49249207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:30,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683441712] [2021-08-12 16:05:30,905 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:30,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:05:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:05:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:31,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683441712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:31,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:31,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:05:31,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472809815] [2021-08-12 16:05:31,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:05:31,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:31,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:05:31,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:05:31,112 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:33,581 INFO L93 Difference]: Finished difference Result 3152 states and 8442 transitions. [2021-08-12 16:05:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:05:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:33,599 INFO L225 Difference]: With dead ends: 3152 [2021-08-12 16:05:33,599 INFO L226 Difference]: Without dead ends: 2690 [2021-08-12 16:05:33,601 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:05:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-08-12 16:05:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-08-12 16:05:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-08-12 16:05:34,084 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-08-12 16:05:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:34,085 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-08-12 16:05:34,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-08-12 16:05:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:34,086 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:34,086 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:34,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:34,303 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-08-12 16:05:34,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:34,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270439136] [2021-08-12 16:05:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:34,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:34,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270439136] [2021-08-12 16:05:34,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270439136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:34,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707666251] [2021-08-12 16:05:34,445 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:34,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:05:34,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:34,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707666251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:34,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:34,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:05:34,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297156617] [2021-08-12 16:05:34,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:34,630 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:05:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:39,651 INFO L93 Difference]: Finished difference Result 3774 states and 9559 transitions. [2021-08-12 16:05:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:05:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:05:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:39,667 INFO L225 Difference]: With dead ends: 3774 [2021-08-12 16:05:39,668 INFO L226 Difference]: Without dead ends: 3376 [2021-08-12 16:05:39,669 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:05:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-08-12 16:05:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-08-12 16:05:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-08-12 16:05:40,239 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-08-12 16:05:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:40,239 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-08-12 16:05:40,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:05:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-08-12 16:05:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:40,241 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:40,242 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:40,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-12 16:05:40,458 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-08-12 16:05:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410848336] [2021-08-12 16:05:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:40,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410848336] [2021-08-12 16:05:40,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410848336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425577606] [2021-08-12 16:05:40,614 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:40,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:05:40,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425577606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:40,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:40,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:05:40,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239923776] [2021-08-12 16:05:40,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:05:40,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:05:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:05:40,827 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:46,233 INFO L93 Difference]: Finished difference Result 3734 states and 9554 transitions. [2021-08-12 16:05:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:05:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:46,250 INFO L225 Difference]: With dead ends: 3734 [2021-08-12 16:05:46,250 INFO L226 Difference]: Without dead ends: 3336 [2021-08-12 16:05:46,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:05:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-08-12 16:05:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-08-12 16:05:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-08-12 16:05:46,845 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-08-12 16:05:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:46,845 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-08-12 16:05:46,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-08-12 16:05:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:46,847 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:46,847 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:47,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-12 16:05:47,063 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-08-12 16:05:47,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:47,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074953038] [2021-08-12 16:05:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074953038] [2021-08-12 16:05:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074953038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047756504] [2021-08-12 16:05:47,200 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:47,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:05:47,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:47,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047756504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:47,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:47,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:05:47,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514324160] [2021-08-12 16:05:47,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:47,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:47,375 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:05:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:52,712 INFO L93 Difference]: Finished difference Result 3784 states and 9729 transitions. [2021-08-12 16:05:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:05:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:05:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:52,731 INFO L225 Difference]: With dead ends: 3784 [2021-08-12 16:05:52,731 INFO L226 Difference]: Without dead ends: 3386 [2021-08-12 16:05:52,732 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:05:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-08-12 16:05:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-08-12 16:05:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-08-12 16:05:53,270 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-08-12 16:05:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-08-12 16:05:53,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:05:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-08-12 16:05:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:53,273 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:53,273 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:53,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 16:05:53,490 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-08-12 16:05:53,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:53,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068490104] [2021-08-12 16:05:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:53,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:53,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068490104] [2021-08-12 16:05:53,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068490104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:53,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132966471] [2021-08-12 16:05:53,633 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:53,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:05:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132966471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:53,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:53,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:05:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206710548] [2021-08-12 16:05:53,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:05:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:05:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:05:53,824 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:59,169 INFO L93 Difference]: Finished difference Result 3809 states and 9854 transitions. [2021-08-12 16:05:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:05:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:59,185 INFO L225 Difference]: With dead ends: 3809 [2021-08-12 16:05:59,185 INFO L226 Difference]: Without dead ends: 3411 [2021-08-12 16:05:59,186 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:05:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-08-12 16:05:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-08-12 16:05:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-08-12 16:05:59,722 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-08-12 16:05:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:59,723 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-08-12 16:05:59,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-08-12 16:05:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:59,725 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:59,725 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:59,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-12 16:05:59,941 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-08-12 16:05:59,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:59,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745429848] [2021-08-12 16:05:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:00,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:00,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745429848] [2021-08-12 16:06:00,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745429848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:00,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114853702] [2021-08-12 16:06:00,073 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:00,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114853702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:00,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:00,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:06:00,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403499095] [2021-08-12 16:06:00,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:06:00,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:00,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:06:00,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:06:00,266 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:05,370 INFO L93 Difference]: Finished difference Result 3834 states and 9979 transitions. [2021-08-12 16:06:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:06:05,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:06:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:05,388 INFO L225 Difference]: With dead ends: 3834 [2021-08-12 16:06:05,388 INFO L226 Difference]: Without dead ends: 3436 [2021-08-12 16:06:05,389 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:06:05,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-08-12 16:06:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-08-12 16:06:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-08-12 16:06:05,923 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-08-12 16:06:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:05,924 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-08-12 16:06:05,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-08-12 16:06:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:05,926 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:05,926 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:06,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-12 16:06:06,141 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-08-12 16:06:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:06,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268193651] [2021-08-12 16:06:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:06,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:06,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268193651] [2021-08-12 16:06:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268193651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:06,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355805212] [2021-08-12 16:06:06,277 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:06,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:06:06,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:06,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:06,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355805212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:06,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:06,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:06,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803040953] [2021-08-12 16:06:06,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:06,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:06,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:06,475 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:11,499 INFO L93 Difference]: Finished difference Result 3859 states and 10104 transitions. [2021-08-12 16:06:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:06:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:11,516 INFO L225 Difference]: With dead ends: 3859 [2021-08-12 16:06:11,516 INFO L226 Difference]: Without dead ends: 3461 [2021-08-12 16:06:11,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:06:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-08-12 16:06:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-08-12 16:06:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-08-12 16:06:12,120 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-08-12 16:06:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:12,120 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-08-12 16:06:12,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-08-12 16:06:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:12,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:12,123 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:12,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-12 16:06:12,339 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-08-12 16:06:12,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:12,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139383348] [2021-08-12 16:06:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:12,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:12,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139383348] [2021-08-12 16:06:12,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139383348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:12,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35220677] [2021-08-12 16:06:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:12,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:06:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 16:06:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:12,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35220677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:12,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:12,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:06:12,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878669272] [2021-08-12 16:06:12,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:06:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:06:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:06:12,628 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:17,375 INFO L93 Difference]: Finished difference Result 3884 states and 10229 transitions. [2021-08-12 16:06:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:06:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:06:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:17,395 INFO L225 Difference]: With dead ends: 3884 [2021-08-12 16:06:17,395 INFO L226 Difference]: Without dead ends: 3486 [2021-08-12 16:06:17,396 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:06:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-08-12 16:06:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-08-12 16:06:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-08-12 16:06:17,945 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-08-12 16:06:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:17,945 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-08-12 16:06:17,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-08-12 16:06:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:17,947 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:17,947 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:18,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-12 16:06:18,149 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-08-12 16:06:18,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:18,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257338873] [2021-08-12 16:06:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:18,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:18,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257338873] [2021-08-12 16:06:18,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257338873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:18,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156143110] [2021-08-12 16:06:18,295 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:18,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:06:18,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:18,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156143110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:18,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:18,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:18,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999053699] [2021-08-12 16:06:18,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:18,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:18,476 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:23,176 INFO L93 Difference]: Finished difference Result 3909 states and 10354 transitions. [2021-08-12 16:06:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:06:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:23,195 INFO L225 Difference]: With dead ends: 3909 [2021-08-12 16:06:23,196 INFO L226 Difference]: Without dead ends: 3511 [2021-08-12 16:06:23,196 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:06:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-08-12 16:06:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-08-12 16:06:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-08-12 16:06:23,761 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-08-12 16:06:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:23,761 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-08-12 16:06:23,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-08-12 16:06:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:23,763 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:23,763 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:23,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:23,980 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-08-12 16:06:23,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:23,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540967458] [2021-08-12 16:06:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:24,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:24,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540967458] [2021-08-12 16:06:24,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540967458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:24,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648989354] [2021-08-12 16:06:24,096 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:24,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:06:24,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:24,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648989354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:24,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:24,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:06:24,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791124867] [2021-08-12 16:06:24,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:06:24,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:24,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:06:24,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:06:24,271 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:28,708 INFO L93 Difference]: Finished difference Result 3934 states and 10479 transitions. [2021-08-12 16:06:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:06:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:06:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:28,725 INFO L225 Difference]: With dead ends: 3934 [2021-08-12 16:06:28,725 INFO L226 Difference]: Without dead ends: 3536 [2021-08-12 16:06:28,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:06:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-08-12 16:06:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-08-12 16:06:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-08-12 16:06:29,277 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-08-12 16:06:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:29,277 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-08-12 16:06:29,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-08-12 16:06:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:29,280 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:29,280 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:29,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-12 16:06:29,493 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-08-12 16:06:29,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:29,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660375166] [2021-08-12 16:06:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:29,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:29,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660375166] [2021-08-12 16:06:29,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660375166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:29,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505118096] [2021-08-12 16:06:29,612 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:29,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:06:29,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 16:06:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:29,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505118096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:29,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:29,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:29,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563281456] [2021-08-12 16:06:29,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:29,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:29,848 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:34,273 INFO L93 Difference]: Finished difference Result 3959 states and 10604 transitions. [2021-08-12 16:06:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:06:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:34,292 INFO L225 Difference]: With dead ends: 3959 [2021-08-12 16:06:34,292 INFO L226 Difference]: Without dead ends: 3561 [2021-08-12 16:06:34,293 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:06:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-08-12 16:06:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-08-12 16:06:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-08-12 16:06:34,871 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-08-12 16:06:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:34,871 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-08-12 16:06:34,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-08-12 16:06:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:34,874 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:34,874 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:35,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:35,089 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-08-12 16:06:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:35,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525938267] [2021-08-12 16:06:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:35,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525938267] [2021-08-12 16:06:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525938267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847330379] [2021-08-12 16:06:35,204 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:35,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:35,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847330379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:35,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:35,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:06:35,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369647666] [2021-08-12 16:06:35,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:06:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:06:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:06:35,426 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:39,537 INFO L93 Difference]: Finished difference Result 3984 states and 10729 transitions. [2021-08-12 16:06:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:06:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:06:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:39,557 INFO L225 Difference]: With dead ends: 3984 [2021-08-12 16:06:39,557 INFO L226 Difference]: Without dead ends: 3586 [2021-08-12 16:06:39,558 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:06:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-08-12 16:06:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-08-12 16:06:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-08-12 16:06:40,129 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-08-12 16:06:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:40,129 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-08-12 16:06:40,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-08-12 16:06:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:40,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:40,132 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:40,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-12 16:06:40,345 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-08-12 16:06:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:40,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283658184] [2021-08-12 16:06:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:40,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:40,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283658184] [2021-08-12 16:06:40,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283658184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:40,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036056152] [2021-08-12 16:06:40,459 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:40,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:06:40,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:40,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036056152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:40,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:40,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:40,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7117002] [2021-08-12 16:06:40,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:40,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:40,624 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:44,809 INFO L93 Difference]: Finished difference Result 4069 states and 11019 transitions. [2021-08-12 16:06:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 16:06:44,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:44,829 INFO L225 Difference]: With dead ends: 4069 [2021-08-12 16:06:44,830 INFO L226 Difference]: Without dead ends: 3671 [2021-08-12 16:06:44,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 16:06:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-08-12 16:06:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-08-12 16:06:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-08-12 16:06:45,443 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-08-12 16:06:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:45,443 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-08-12 16:06:45,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-08-12 16:06:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:45,446 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:45,446 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:45,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:45,661 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:45,661 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-08-12 16:06:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:45,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123298331] [2021-08-12 16:06:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:45,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:45,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123298331] [2021-08-12 16:06:45,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123298331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367514582] [2021-08-12 16:06:45,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:45,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:06:45,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:06:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:45,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367514582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:45,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:45,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 16:06:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606077819] [2021-08-12 16:06:45,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:06:45,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:06:45,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:06:45,939 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:49,786 INFO L93 Difference]: Finished difference Result 4836 states and 13193 transitions. [2021-08-12 16:06:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:06:49,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 100 [2021-08-12 16:06:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:49,805 INFO L225 Difference]: With dead ends: 4836 [2021-08-12 16:06:49,805 INFO L226 Difference]: Without dead ends: 4438 [2021-08-12 16:06:49,806 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:06:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-08-12 16:06:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-08-12 16:06:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-08-12 16:06:50,363 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-08-12 16:06:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:50,363 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-08-12 16:06:50,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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) [2021-08-12 16:06:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-08-12 16:06:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:50,366 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:50,366 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:50,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-12 16:06:50,581 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:50,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:50,582 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-08-12 16:06:50,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:50,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367040697] [2021-08-12 16:06:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:50,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:50,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367040697] [2021-08-12 16:06:50,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367040697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:50,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527105578] [2021-08-12 16:06:50,694 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:50,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:06:50,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:50,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527105578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:50,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:50,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:06:50,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466704957] [2021-08-12 16:06:50,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:50,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:50,879 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:55,043 INFO L93 Difference]: Finished difference Result 4779 states and 13181 transitions. [2021-08-12 16:06:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 16:06:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:55,064 INFO L225 Difference]: With dead ends: 4779 [2021-08-12 16:06:55,065 INFO L226 Difference]: Without dead ends: 4076 [2021-08-12 16:06:55,066 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 16:06:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-08-12 16:06:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-08-12 16:06:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:06:55,684 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-08-12 16:06:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:55,684 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:06:55,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:06:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:06:55,687 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:55,687 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:55,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 16:06:55,903 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-08-12 16:06:55,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:55,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630803297] [2021-08-12 16:06:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:56,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630803297] [2021-08-12 16:06:56,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630803297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204838194] [2021-08-12 16:06:56,054 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:56,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:06:56,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:06:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204838194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:56,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:56,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:06:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780585629] [2021-08-12 16:06:56,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:56,243 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:01,274 INFO L93 Difference]: Finished difference Result 4474 states and 12009 transitions. [2021-08-12 16:07:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:07:01,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:01,296 INFO L225 Difference]: With dead ends: 4474 [2021-08-12 16:07:01,296 INFO L226 Difference]: Without dead ends: 4076 [2021-08-12 16:07:01,297 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:07:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-08-12 16:07:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-08-12 16:07:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:01,914 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:01,915 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:01,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:01,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:01,917 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:02,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-12 16:07:02,133 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-08-12 16:07:02,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:02,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216004132] [2021-08-12 16:07:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:02,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216004132] [2021-08-12 16:07:02,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216004132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364811236] [2021-08-12 16:07:02,289 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:02,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:07:02,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364811236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:02,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:02,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:02,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990846434] [2021-08-12 16:07:02,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:02,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:02,497 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:09,326 INFO L93 Difference]: Finished difference Result 4769 states and 12599 transitions. [2021-08-12 16:07:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:07:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:09,350 INFO L225 Difference]: With dead ends: 4769 [2021-08-12 16:07:09,350 INFO L226 Difference]: Without dead ends: 4371 [2021-08-12 16:07:09,351 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:07:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-08-12 16:07:10,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-08-12 16:07:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:10,032 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:10,033 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:10,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:10,036 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:10,036 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:10,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:10,252 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-08-12 16:07:10,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:10,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415723855] [2021-08-12 16:07:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:10,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:10,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415723855] [2021-08-12 16:07:10,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415723855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:10,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190840117] [2021-08-12 16:07:10,390 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:10,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190840117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:10,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:10,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:10,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574773218] [2021-08-12 16:07:10,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:10,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:10,582 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:17,557 INFO L93 Difference]: Finished difference Result 4724 states and 12509 transitions. [2021-08-12 16:07:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:07:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:17,577 INFO L225 Difference]: With dead ends: 4724 [2021-08-12 16:07:17,577 INFO L226 Difference]: Without dead ends: 4326 [2021-08-12 16:07:17,578 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:07:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-08-12 16:07:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-08-12 16:07:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:18,311 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:18,311 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:18,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:18,314 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:18,314 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:18,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-12 16:07:18,530 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-08-12 16:07:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:18,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277525127] [2021-08-12 16:07:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:18,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:18,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277525127] [2021-08-12 16:07:18,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277525127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:18,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524134284] [2021-08-12 16:07:18,681 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:18,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:07:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:18,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:18,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524134284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:18,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:18,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158112667] [2021-08-12 16:07:18,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:18,882 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:25,860 INFO L93 Difference]: Finished difference Result 4674 states and 12409 transitions. [2021-08-12 16:07:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:07:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:25,881 INFO L225 Difference]: With dead ends: 4674 [2021-08-12 16:07:25,881 INFO L226 Difference]: Without dead ends: 4276 [2021-08-12 16:07:25,882 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:07:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-08-12 16:07:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-08-12 16:07:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:26,579 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:26,580 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:26,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:26,582 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:26,583 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:26,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:26,797 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-08-12 16:07:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:26,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876940466] [2021-08-12 16:07:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:26,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:26,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876940466] [2021-08-12 16:07:26,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876940466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:26,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565487510] [2021-08-12 16:07:26,932 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:07:26,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 16:07:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:27,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565487510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:27,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:27,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:27,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478930180] [2021-08-12 16:07:27,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:27,126 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:33,932 INFO L93 Difference]: Finished difference Result 4624 states and 12309 transitions. [2021-08-12 16:07:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:07:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:33,954 INFO L225 Difference]: With dead ends: 4624 [2021-08-12 16:07:33,954 INFO L226 Difference]: Without dead ends: 4226 [2021-08-12 16:07:33,955 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:07:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-08-12 16:07:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-08-12 16:07:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:34,645 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:34,645 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:34,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:34,648 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:34,648 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:34,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 16:07:34,864 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-08-12 16:07:34,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:34,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087057473] [2021-08-12 16:07:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:35,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:35,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087057473] [2021-08-12 16:07:35,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087057473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:35,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919523676] [2021-08-12 16:07:35,006 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:35,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:07:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:35,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919523676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:35,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:35,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:35,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541232157] [2021-08-12 16:07:35,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:35,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:35,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:35,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:35,211 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:41,851 INFO L93 Difference]: Finished difference Result 4574 states and 12209 transitions. [2021-08-12 16:07:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:07:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:41,871 INFO L225 Difference]: With dead ends: 4574 [2021-08-12 16:07:41,871 INFO L226 Difference]: Without dead ends: 4176 [2021-08-12 16:07:41,872 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:07:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-08-12 16:07:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-08-12 16:07:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:42,569 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:42,569 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:42,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:42,572 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:42,572 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:42,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-12 16:07:42,788 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-08-12 16:07:42,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:42,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433066080] [2021-08-12 16:07:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:42,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:42,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433066080] [2021-08-12 16:07:42,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433066080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:42,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320655475] [2021-08-12 16:07:42,918 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:42,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:07:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:42,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320655475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519201661] [2021-08-12 16:07:43,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:43,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:43,093 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:49,477 INFO L93 Difference]: Finished difference Result 4524 states and 12109 transitions. [2021-08-12 16:07:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:07:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:49,501 INFO L225 Difference]: With dead ends: 4524 [2021-08-12 16:07:49,501 INFO L226 Difference]: Without dead ends: 4126 [2021-08-12 16:07:49,503 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:07:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-08-12 16:07:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-08-12 16:07:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:50,249 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:50,249 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:50,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:50,252 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:50,252 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:50,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-12 16:07:50,465 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-08-12 16:07:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:50,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009899919] [2021-08-12 16:07:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009899919] [2021-08-12 16:07:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009899919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027148431] [2021-08-12 16:07:50,599 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:50,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:07:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:50,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:50,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027148431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:50,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:50,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:50,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121432311] [2021-08-12 16:07:50,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:50,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:50,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:50,810 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:56,971 INFO L93 Difference]: Finished difference Result 4474 states and 12009 transitions. [2021-08-12 16:07:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:07:56,972 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:56,996 INFO L225 Difference]: With dead ends: 4474 [2021-08-12 16:07:56,996 INFO L226 Difference]: Without dead ends: 4076 [2021-08-12 16:07:56,998 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 16:07:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-08-12 16:07:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-08-12 16:07:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:07:57,755 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:07:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:57,755 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:07:57,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:07:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:57,758 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:57,758 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:57,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:57,974 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-08-12 16:07:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:57,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236631281] [2021-08-12 16:07:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:58,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:58,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236631281] [2021-08-12 16:07:58,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236631281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:58,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628832459] [2021-08-12 16:07:58,099 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:58,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628832459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:58,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:58,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:58,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699097167] [2021-08-12 16:07:58,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:58,282 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:04,147 INFO L93 Difference]: Finished difference Result 4424 states and 11909 transitions. [2021-08-12 16:08:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:08:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:04,173 INFO L225 Difference]: With dead ends: 4424 [2021-08-12 16:08:04,173 INFO L226 Difference]: Without dead ends: 4026 [2021-08-12 16:08:04,175 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 16:08:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-08-12 16:08:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-08-12 16:08:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:08:04,921 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:08:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:04,921 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:08:04,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:08:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:04,924 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:04,924 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:05,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:05,140 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:05,140 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-08-12 16:08:05,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:05,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119401044] [2021-08-12 16:08:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:05,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:05,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119401044] [2021-08-12 16:08:05,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119401044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:05,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67713009] [2021-08-12 16:08:05,268 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:05,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:08:05,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:08:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:05,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67713009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:05,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:05,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:08:05,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059841744] [2021-08-12 16:08:05,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:05,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:05,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:05,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:05,456 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:11,226 INFO L93 Difference]: Finished difference Result 4374 states and 11809 transitions. [2021-08-12 16:08:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 16:08:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:11,250 INFO L225 Difference]: With dead ends: 4374 [2021-08-12 16:08:11,250 INFO L226 Difference]: Without dead ends: 3976 [2021-08-12 16:08:11,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 16:08:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-08-12 16:08:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-08-12 16:08:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:08:11,957 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:08:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:11,957 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:08:11,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:08:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:11,960 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:11,960 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:12,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:12,176 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:12,176 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-08-12 16:08:12,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:12,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337101113] [2021-08-12 16:08:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:12,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:12,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337101113] [2021-08-12 16:08:12,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337101113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:12,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390933204] [2021-08-12 16:08:12,298 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:12,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:08:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 16:08:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390933204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:12,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:12,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:08:12,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254016390] [2021-08-12 16:08:12,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:08:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:08:12,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:08:12,547 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:17,999 INFO L93 Difference]: Finished difference Result 4324 states and 11709 transitions. [2021-08-12 16:08:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 16:08:18,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:18,022 INFO L225 Difference]: With dead ends: 4324 [2021-08-12 16:08:18,022 INFO L226 Difference]: Without dead ends: 3926 [2021-08-12 16:08:18,023 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 16:08:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-08-12 16:08:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-08-12 16:08:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-08-12 16:08:18,715 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-08-12 16:08:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:18,715 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-08-12 16:08:18,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-08-12 16:08:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:18,717 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:18,717 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:18,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-12 16:08:18,933 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-08-12 16:08:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:18,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953326717] [2021-08-12 16:08:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:19,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953326717] [2021-08-12 16:08:19,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953326717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470305] [2021-08-12 16:08:19,059 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:19,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:08:19,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:08:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:19,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:19,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:19,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:08:19,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608072917] [2021-08-12 16:08:19,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:19,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:19,259 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:24,633 INFO L93 Difference]: Finished difference Result 4334 states and 11759 transitions. [2021-08-12 16:08:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 16:08:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:24,655 INFO L225 Difference]: With dead ends: 4334 [2021-08-12 16:08:24,655 INFO L226 Difference]: Without dead ends: 3936 [2021-08-12 16:08:24,656 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 542.9ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 16:08:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-08-12 16:08:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-08-12 16:08:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-08-12 16:08:25,419 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-08-12 16:08:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:25,419 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-08-12 16:08:25,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-08-12 16:08:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:25,422 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:25,422 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:25,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-12 16:08:25,638 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-08-12 16:08:25,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:25,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834569621] [2021-08-12 16:08:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:25,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:25,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834569621] [2021-08-12 16:08:25,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834569621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:25,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649932734] [2021-08-12 16:08:25,760 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:25,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:08:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:08:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649932734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:25,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:25,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:08:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331771398] [2021-08-12 16:08:25,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:08:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:08:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:08:25,939 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:30,910 INFO L93 Difference]: Finished difference Result 5076 states and 13883 transitions. [2021-08-12 16:08:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 16:08:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:30,933 INFO L225 Difference]: With dead ends: 5076 [2021-08-12 16:08:30,933 INFO L226 Difference]: Without dead ends: 4678 [2021-08-12 16:08:30,934 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 16:08:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-08-12 16:08:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-08-12 16:08:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-08-12 16:08:31,636 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-08-12 16:08:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:31,636 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-08-12 16:08:31,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-08-12 16:08:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:31,639 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:31,639 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:31,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-12 16:08:31,853 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-08-12 16:08:31,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:31,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636222164] [2021-08-12 16:08:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:31,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636222164] [2021-08-12 16:08:31,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636222164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777059547] [2021-08-12 16:08:31,979 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:32,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:08:32,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:08:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:32,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777059547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:32,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:32,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:08:32,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933006905] [2021-08-12 16:08:32,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:32,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:32,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:32,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:32,168 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 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) [2021-08-12 16:08:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:37,382 INFO L93 Difference]: Finished difference Result 4944 states and 13676 transitions. [2021-08-12 16:08:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 16:08:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 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 105 [2021-08-12 16:08:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:37,404 INFO L225 Difference]: With dead ends: 4944 [2021-08-12 16:08:37,404 INFO L226 Difference]: Without dead ends: 4241 [2021-08-12 16:08:37,406 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 16:08:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-08-12 16:08:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-08-12 16:08:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-08-12 16:08:38,069 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-08-12 16:08:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:38,070 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-08-12 16:08:38,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 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) [2021-08-12 16:08:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-08-12 16:08:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:38,072 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:38,072 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:38,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-12 16:08:38,288 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-08-12 16:08:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:38,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207522580] [2021-08-12 16:08:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:38,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:38,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207522580] [2021-08-12 16:08:38,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207522580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:38,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760084175] [2021-08-12 16:08:38,468 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:08:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:38,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760084175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:38,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:38,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-08-12 16:08:38,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885438768] [2021-08-12 16:08:38,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 16:08:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:38,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 16:08:38,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:08:38,757 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:43,045 INFO L93 Difference]: Finished difference Result 3492 states and 9332 transitions. [2021-08-12 16:08:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:08:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:08:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:43,066 INFO L225 Difference]: With dead ends: 3492 [2021-08-12 16:08:43,067 INFO L226 Difference]: Without dead ends: 3030 [2021-08-12 16:08:43,068 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:08:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-08-12 16:08:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-08-12 16:08:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-08-12 16:08:43,927 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-08-12 16:08:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:43,928 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-08-12 16:08:43,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-08-12 16:08:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:43,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:43,930 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:44,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:44,145 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-08-12 16:08:44,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:44,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219657351] [2021-08-12 16:08:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219657351] [2021-08-12 16:08:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219657351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332109860] [2021-08-12 16:08:44,311 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:44,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:08:44,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:44,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:08:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:44,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332109860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:44,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:44,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:08:44,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546151844] [2021-08-12 16:08:44,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:44,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:44,512 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:54,212 INFO L93 Difference]: Finished difference Result 4214 states and 10649 transitions. [2021-08-12 16:08:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:08:54,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:08:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:54,236 INFO L225 Difference]: With dead ends: 4214 [2021-08-12 16:08:54,236 INFO L226 Difference]: Without dead ends: 3816 [2021-08-12 16:08:54,237 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:08:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-08-12 16:08:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-08-12 16:08:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-08-12 16:08:55,201 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-08-12 16:08:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:55,201 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-08-12 16:08:55,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-08-12 16:08:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:55,203 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:55,203 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:55,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:55,420 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-08-12 16:08:55,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:55,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507027618] [2021-08-12 16:08:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:55,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:55,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507027618] [2021-08-12 16:08:55,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507027618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:55,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397020734] [2021-08-12 16:08:55,594 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:55,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:08:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:08:55,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:55,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397020734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:55,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:55,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:08:55,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810273729] [2021-08-12 16:08:55,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:08:55,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:55,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:08:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:08:55,813 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:05,669 INFO L93 Difference]: Finished difference Result 4174 states and 10644 transitions. [2021-08-12 16:09:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:09:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:05,689 INFO L225 Difference]: With dead ends: 4174 [2021-08-12 16:09:05,690 INFO L226 Difference]: Without dead ends: 3776 [2021-08-12 16:09:05,690 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:09:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-08-12 16:09:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-08-12 16:09:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-08-12 16:09:06,628 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-08-12 16:09:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:06,628 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-08-12 16:09:06,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-08-12 16:09:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:06,631 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:06,631 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:06,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-12 16:09:06,847 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:06,847 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-08-12 16:09:06,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:06,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97953331] [2021-08-12 16:09:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:07,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:07,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97953331] [2021-08-12 16:09:07,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97953331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:07,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463427359] [2021-08-12 16:09:07,005 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:07,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:09:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:07,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:07,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463427359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:07,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:07,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:09:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071116211] [2021-08-12 16:09:07,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:09:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:09:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:09:07,203 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:17,087 INFO L93 Difference]: Finished difference Result 4224 states and 10819 transitions. [2021-08-12 16:09:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:09:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:17,111 INFO L225 Difference]: With dead ends: 4224 [2021-08-12 16:09:17,111 INFO L226 Difference]: Without dead ends: 3826 [2021-08-12 16:09:17,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:09:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-08-12 16:09:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-08-12 16:09:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-08-12 16:09:18,097 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-08-12 16:09:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:18,097 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-08-12 16:09:18,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-08-12 16:09:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:18,099 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:18,099 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:18,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:18,315 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:18,315 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-08-12 16:09:18,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:18,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51477156] [2021-08-12 16:09:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:18,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51477156] [2021-08-12 16:09:18,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51477156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606509161] [2021-08-12 16:09:18,474 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:18,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 16:09:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606509161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:18,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:18,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:09:18,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387649567] [2021-08-12 16:09:18,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:09:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:09:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:09:18,683 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:28,493 INFO L93 Difference]: Finished difference Result 4249 states and 10944 transitions. [2021-08-12 16:09:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:09:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:28,515 INFO L225 Difference]: With dead ends: 4249 [2021-08-12 16:09:28,515 INFO L226 Difference]: Without dead ends: 3851 [2021-08-12 16:09:28,516 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:09:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-08-12 16:09:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-08-12 16:09:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-08-12 16:09:29,545 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-08-12 16:09:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:29,545 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-08-12 16:09:29,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-08-12 16:09:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:29,547 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:29,547 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:29,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:29,749 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-08-12 16:09:29,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:29,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351513324] [2021-08-12 16:09:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:29,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351513324] [2021-08-12 16:09:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351513324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887441126] [2021-08-12 16:09:29,900 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:29,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 16:09:29,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:30,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887441126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:30,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:30,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:09:30,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239506911] [2021-08-12 16:09:30,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:09:30,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:09:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:09:30,109 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:39,651 INFO L93 Difference]: Finished difference Result 4274 states and 11069 transitions. [2021-08-12 16:09:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:09:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:39,676 INFO L225 Difference]: With dead ends: 4274 [2021-08-12 16:09:39,676 INFO L226 Difference]: Without dead ends: 3876 [2021-08-12 16:09:39,677 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:09:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-08-12 16:09:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-08-12 16:09:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-08-12 16:09:40,658 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-08-12 16:09:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:40,658 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-08-12 16:09:40,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-08-12 16:09:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:40,660 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:40,661 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:40,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:40,875 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-08-12 16:09:40,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:40,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265324223] [2021-08-12 16:09:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:41,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265324223] [2021-08-12 16:09:41,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265324223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095239705] [2021-08-12 16:09:41,025 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095239705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:41,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:41,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:09:41,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649248248] [2021-08-12 16:09:41,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:09:41,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:09:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:09:41,232 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:50,695 INFO L93 Difference]: Finished difference Result 4299 states and 11194 transitions. [2021-08-12 16:09:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:09:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:50,719 INFO L225 Difference]: With dead ends: 4299 [2021-08-12 16:09:50,719 INFO L226 Difference]: Without dead ends: 3901 [2021-08-12 16:09:50,720 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:09:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-08-12 16:09:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-08-12 16:09:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-08-12 16:09:51,713 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-08-12 16:09:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:51,713 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-08-12 16:09:51,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-08-12 16:09:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:51,716 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:51,716 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:51,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-12 16:09:51,932 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-08-12 16:09:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:51,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480574045] [2021-08-12 16:09:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:52,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:52,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480574045] [2021-08-12 16:09:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480574045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:52,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097377277] [2021-08-12 16:09:52,075 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:52,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:09:52,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097377277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:52,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:52,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:09:52,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804459202] [2021-08-12 16:09:52,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:09:52,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:09:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:09:52,271 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:01,501 INFO L93 Difference]: Finished difference Result 4324 states and 11319 transitions. [2021-08-12 16:10:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:10:01,502 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:01,525 INFO L225 Difference]: With dead ends: 4324 [2021-08-12 16:10:01,526 INFO L226 Difference]: Without dead ends: 3926 [2021-08-12 16:10:01,526 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:10:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-08-12 16:10:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-08-12 16:10:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-08-12 16:10:02,581 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-08-12 16:10:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:02,581 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-08-12 16:10:02,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-08-12 16:10:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:02,584 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:02,584 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:02,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-12 16:10:02,800 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-08-12 16:10:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344718860] [2021-08-12 16:10:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:02,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:02,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344718860] [2021-08-12 16:10:02,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344718860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:02,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614379881] [2021-08-12 16:10:02,948 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:03,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:10:03,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 16:10:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614379881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:03,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:03,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:10:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198210775] [2021-08-12 16:10:03,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:10:03,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:10:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:10:03,157 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:12,197 INFO L93 Difference]: Finished difference Result 4349 states and 11444 transitions. [2021-08-12 16:10:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:10:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:12,223 INFO L225 Difference]: With dead ends: 4349 [2021-08-12 16:10:12,223 INFO L226 Difference]: Without dead ends: 3951 [2021-08-12 16:10:12,224 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:10:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-08-12 16:10:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-08-12 16:10:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-08-12 16:10:13,307 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-08-12 16:10:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:13,307 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-08-12 16:10:13,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-08-12 16:10:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:13,310 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:13,310 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:13,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-12 16:10:13,523 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-08-12 16:10:13,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:13,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642466198] [2021-08-12 16:10:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:13,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:13,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642466198] [2021-08-12 16:10:13,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642466198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:13,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829453122] [2021-08-12 16:10:13,663 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:13,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:10:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:13,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:13,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829453122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:13,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:13,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:10:13,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384957145] [2021-08-12 16:10:13,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:10:13,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:10:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:10:13,860 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:22,392 INFO L93 Difference]: Finished difference Result 4374 states and 11569 transitions. [2021-08-12 16:10:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:10:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:22,416 INFO L225 Difference]: With dead ends: 4374 [2021-08-12 16:10:22,416 INFO L226 Difference]: Without dead ends: 3976 [2021-08-12 16:10:22,417 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:10:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-08-12 16:10:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-08-12 16:10:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-08-12 16:10:23,445 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-08-12 16:10:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:23,445 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-08-12 16:10:23,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-08-12 16:10:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:23,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:23,448 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:23,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-12 16:10:23,664 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-08-12 16:10:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:23,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510094728] [2021-08-12 16:10:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:23,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510094728] [2021-08-12 16:10:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510094728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835782603] [2021-08-12 16:10:23,806 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:23,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 16:10:23,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:23,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:24,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835782603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:24,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:24,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:10:24,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982001746] [2021-08-12 16:10:24,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:10:24,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:10:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:10:24,011 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:32,490 INFO L93 Difference]: Finished difference Result 4399 states and 11694 transitions. [2021-08-12 16:10:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 16:10:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:32,516 INFO L225 Difference]: With dead ends: 4399 [2021-08-12 16:10:32,516 INFO L226 Difference]: Without dead ends: 4001 [2021-08-12 16:10:32,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 16:10:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-08-12 16:10:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-08-12 16:10:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-08-12 16:10:33,601 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-08-12 16:10:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:33,601 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-08-12 16:10:33,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-08-12 16:10:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:33,604 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:33,604 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:33,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-12 16:10:33,820 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:33,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-08-12 16:10:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:33,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666953429] [2021-08-12 16:10:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:33,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:33,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666953429] [2021-08-12 16:10:33,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666953429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:33,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029162917] [2021-08-12 16:10:33,955 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:34,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 16:10:34,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 16:10:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029162917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:34,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:34,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:10:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202955781] [2021-08-12 16:10:34,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:10:34,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:10:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:10:34,164 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:42,326 INFO L93 Difference]: Finished difference Result 4424 states and 11819 transitions. [2021-08-12 16:10:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:10:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:42,357 INFO L225 Difference]: With dead ends: 4424 [2021-08-12 16:10:42,357 INFO L226 Difference]: Without dead ends: 4026 [2021-08-12 16:10:42,358 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 16:10:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-08-12 16:10:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-08-12 16:10:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-08-12 16:10:43,503 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-08-12 16:10:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:43,503 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-08-12 16:10:43,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-08-12 16:10:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:43,506 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:43,506 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:43,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:43,722 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-08-12 16:10:43,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:43,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629055135] [2021-08-12 16:10:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:43,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:43,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629055135] [2021-08-12 16:10:43,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629055135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:43,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817330782] [2021-08-12 16:10:43,857 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:43,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:44,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817330782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:44,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:44,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:10:44,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118152745] [2021-08-12 16:10:44,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:10:44,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:44,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:10:44,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:10:44,044 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:51,947 INFO L93 Difference]: Finished difference Result 4449 states and 11944 transitions. [2021-08-12 16:10:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 16:10:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:51,979 INFO L225 Difference]: With dead ends: 4449 [2021-08-12 16:10:51,980 INFO L226 Difference]: Without dead ends: 4051 [2021-08-12 16:10:51,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 571.6ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 16:10:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-08-12 16:10:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-08-12 16:10:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-08-12 16:10:53,094 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-08-12 16:10:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:53,106 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-08-12 16:10:53,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-08-12 16:10:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:53,109 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:53,110 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:53,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-12 16:10:53,310 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-08-12 16:10:53,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:53,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558439522] [2021-08-12 16:10:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:53,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:53,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558439522] [2021-08-12 16:10:53,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558439522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:53,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186091351] [2021-08-12 16:10:53,485 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:53,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:10:53,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:53,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186091351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:53,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:53,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:10:53,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708544349] [2021-08-12 16:10:53,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:10:53,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:53,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:10:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:10:53,678 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:01,020 INFO L93 Difference]: Finished difference Result 4519 states and 12189 transitions. [2021-08-12 16:11:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 16:11:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:11:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:01,045 INFO L225 Difference]: With dead ends: 4519 [2021-08-12 16:11:01,045 INFO L226 Difference]: Without dead ends: 4121 [2021-08-12 16:11:01,046 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 16:11:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-08-12 16:11:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-08-12 16:11:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-08-12 16:11:02,119 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-08-12 16:11:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:02,119 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-08-12 16:11:02,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-08-12 16:11:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:11:02,122 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:02,122 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:02,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:02,329 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-08-12 16:11:02,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:02,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369136863] [2021-08-12 16:11:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:02,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369136863] [2021-08-12 16:11:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369136863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931863905] [2021-08-12 16:11:02,465 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:02,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:11:02,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 16:11:02,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931863905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:02,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:11:02,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222911040] [2021-08-12 16:11:02,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:11:02,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:11:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:11:02,673 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:09,957 INFO L93 Difference]: Finished difference Result 5097 states and 13943 transitions. [2021-08-12 16:11:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 16:11:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:11:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:09,982 INFO L225 Difference]: With dead ends: 5097 [2021-08-12 16:11:09,982 INFO L226 Difference]: Without dead ends: 4346 [2021-08-12 16:11:09,984 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 16:11:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-08-12 16:11:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-08-12 16:11:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-08-12 16:11:11,080 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-08-12 16:11:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:11,081 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-08-12 16:11:11,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-08-12 16:11:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:11:11,084 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:11,084 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:11,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:11,301 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-08-12 16:11:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:11,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763267903] [2021-08-12 16:11:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:11,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:11,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763267903] [2021-08-12 16:11:11,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763267903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:11,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760289297] [2021-08-12 16:11:11,431 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:11,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:11:11,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:11:11,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:11,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760289297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:11,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:11,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:11:11,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157381439] [2021-08-12 16:11:11,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:11:11,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:11:11,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:11:11,660 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:18,609 INFO L93 Difference]: Finished difference Result 5326 states and 14533 transitions. [2021-08-12 16:11:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 16:11:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:11:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:18,635 INFO L225 Difference]: With dead ends: 5326 [2021-08-12 16:11:18,635 INFO L226 Difference]: Without dead ends: 4928 [2021-08-12 16:11:18,636 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 16:11:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-08-12 16:11:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-08-12 16:11:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-08-12 16:11:19,627 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-08-12 16:11:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:19,628 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-08-12 16:11:19,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-08-12 16:11:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:11:19,631 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:19,631 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:19,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:19,848 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:19,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-08-12 16:11:19,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:19,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238423952] [2021-08-12 16:11:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:19,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:19,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238423952] [2021-08-12 16:11:19,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238423952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:19,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487044507] [2021-08-12 16:11:19,981 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:20,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 16:11:20,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:11:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487044507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:20,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:20,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:11:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532200017] [2021-08-12 16:11:20,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:11:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:11:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:11:20,188 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:27,455 INFO L93 Difference]: Finished difference Result 5149 states and 14161 transitions. [2021-08-12 16:11:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 16:11:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:11:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:27,482 INFO L225 Difference]: With dead ends: 5149 [2021-08-12 16:11:27,482 INFO L226 Difference]: Without dead ends: 4446 [2021-08-12 16:11:27,483 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 692.2ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-08-12 16:11:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-08-12 16:11:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-08-12 16:11:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-08-12 16:11:28,483 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-08-12 16:11:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-08-12 16:11:28,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-08-12 16:11:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:11:28,486 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:28,486 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:28,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:28,702 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-08-12 16:11:28,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:28,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152330131] [2021-08-12 16:11:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:28,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:28,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152330131] [2021-08-12 16:11:28,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152330131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:28,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456915078] [2021-08-12 16:11:28,875 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:28,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 16:11:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:11:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456915078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:29,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:29,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-12 16:11:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151134896] [2021-08-12 16:11:29,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:11:29,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:11:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:11:29,088 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:38,275 INFO L93 Difference]: Finished difference Result 3949 states and 10269 transitions. [2021-08-12 16:11:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:11:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-12 16:11:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:38,299 INFO L225 Difference]: With dead ends: 3949 [2021-08-12 16:11:38,299 INFO L226 Difference]: Without dead ends: 3551 [2021-08-12 16:11:38,300 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:11:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-08-12 16:11:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-08-12 16:11:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-08-12 16:11:39,435 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-08-12 16:11:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:39,436 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-08-12 16:11:39,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-08-12 16:11:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:11:39,438 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:39,438 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:39,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-12 16:11:39,653 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-08-12 16:11:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191452751] [2021-08-12 16:11:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:39,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:39,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191452751] [2021-08-12 16:11:39,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191452751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:39,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885515254] [2021-08-12 16:11:39,864 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:11:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:40,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885515254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:40,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:40,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-08-12 16:11:40,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622020082] [2021-08-12 16:11:40,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 16:11:40,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:40,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 16:11:40,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-08-12 16:11:40,066 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:52,434 INFO L93 Difference]: Finished difference Result 4369 states and 11184 transitions. [2021-08-12 16:11:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:11:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-12 16:11:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:52,458 INFO L225 Difference]: With dead ends: 4369 [2021-08-12 16:11:52,459 INFO L226 Difference]: Without dead ends: 3971 [2021-08-12 16:11:52,460 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:11:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-08-12 16:11:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-08-12 16:11:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-08-12 16:11:53,650 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-08-12 16:11:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:53,650 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-08-12 16:11:53,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-08-12 16:11:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:11:53,652 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:53,653 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-12 16:11:53,868 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-08-12 16:11:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488284353] [2021-08-12 16:11:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:54,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:54,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488284353] [2021-08-12 16:11:54,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488284353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:54,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22195510] [2021-08-12 16:11:54,029 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:54,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:11:54,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:54,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:11:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22195510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:54,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:54,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-12 16:11:54,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110701034] [2021-08-12 16:11:54,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:11:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:11:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:11:54,239 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:12:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:12:06,926 INFO L93 Difference]: Finished difference Result 4399 states and 11319 transitions. [2021-08-12 16:12:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:12:06,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-12 16:12:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:12:06,951 INFO L225 Difference]: With dead ends: 4399 [2021-08-12 16:12:06,952 INFO L226 Difference]: Without dead ends: 4001 [2021-08-12 16:12:06,953 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:12:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-08-12 16:12:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-08-12 16:12:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:12:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-08-12 16:12:08,162 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-08-12 16:12:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:12:08,162 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-08-12 16:12:08,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:12:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-08-12 16:12:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:12:08,165 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:12:08,165 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:12:08,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-12 16:12:08,373 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:12:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:12:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-08-12 16:12:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:12:08,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542190816] [2021-08-12 16:12:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:12:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:12:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:12:08,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:12:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542190816] [2021-08-12 16:12:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542190816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:12:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141505358] [2021-08-12 16:12:08,551 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:12:08,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:12:08,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:12:08,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 16:12:08,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:12:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:12:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141505358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:12:08,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:12:08,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-08-12 16:12:08,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660585514] [2021-08-12 16:12:08,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 16:12:08,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:12:08,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 16:12:08,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-12 16:12:08,776 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:12:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:12:21,490 INFO L93 Difference]: Finished difference Result 4424 states and 11444 transitions. [2021-08-12 16:12:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:12:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-12 16:12:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:12:21,515 INFO L225 Difference]: With dead ends: 4424 [2021-08-12 16:12:21,516 INFO L226 Difference]: Without dead ends: 4026 [2021-08-12 16:12:21,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 16:12:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-08-12 16:12:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-08-12 16:12:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:12:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-08-12 16:12:22,759 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-08-12 16:12:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:12:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-08-12 16:12:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:12:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-08-12 16:12:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:12:22,762 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:12:22,762 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:12:22,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-12 16:12:22,977 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:12:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:12:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-08-12 16:12:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:12:22,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051410502] [2021-08-12 16:12:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:12:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:12:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:12:23,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:12:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051410502] [2021-08-12 16:12:23,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051410502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:12:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962488259] [2021-08-12 16:12:23,134 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:12:23,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:12:23,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:12:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:12:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:12:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:12:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962488259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:12:23,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:12:23,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-12 16:12:23,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407762395] [2021-08-12 16:12:23,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:12:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:12:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:12:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:12:23,373 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 16:12:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:12:25,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:12:25,085 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 16:12:25,088 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 16:12:25,089 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 16:12:25,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 04:12:25 BasicIcfg [2021-08-12 16:12:25,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 16:12:25,089 INFO L168 Benchmark]: Toolchain (without parser) took 596389.64 ms. Allocated memory was 155.2 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 118.7 MB in the beginning and 755.1 MB in the end (delta: -636.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-12 16:12:25,090 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 155.2 MB. Free memory is still 136.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 16:12:25,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.72 ms. Allocated memory is still 155.2 MB. Free memory was 118.4 MB in the beginning and 118.8 MB in the end (delta: -397.5 kB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2021-08-12 16:12:25,091 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.78 ms. Allocated memory is still 155.2 MB. Free memory was 118.8 MB in the beginning and 117.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 16:12:25,091 INFO L168 Benchmark]: Boogie Preprocessor took 31.53 ms. Allocated memory is still 155.2 MB. Free memory was 117.2 MB in the beginning and 115.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 16:12:25,091 INFO L168 Benchmark]: RCFGBuilder took 383.33 ms. Allocated memory is still 155.2 MB. Free memory was 115.7 MB in the beginning and 94.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-12 16:12:25,091 INFO L168 Benchmark]: TraceAbstraction took 595523.22 ms. Allocated memory was 155.2 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 94.1 MB in the beginning and 755.1 MB in the end (delta: -660.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-12 16:12:25,108 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 155.2 MB. Free memory is still 136.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 402.72 ms. Allocated memory is still 155.2 MB. Free memory was 118.4 MB in the beginning and 118.8 MB in the end (delta: -397.5 kB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.78 ms. Allocated memory is still 155.2 MB. Free memory was 118.8 MB in the beginning and 117.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.53 ms. Allocated memory is still 155.2 MB. Free memory was 117.2 MB in the beginning and 115.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.33 ms. Allocated memory is still 155.2 MB. Free memory was 115.7 MB in the beginning and 94.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 595523.22 ms. Allocated memory was 155.2 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 94.1 MB in the beginning and 755.1 MB in the end (delta: -660.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (2903states) and FLOYD_HOARE automaton (currently 21 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (958 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 595454.6ms, OverallIterations: 147, TraceHistogramMax: 9, EmptinessCheckTime: 332.2ms, AutomataDifference: 466209.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 80.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14217 SDtfs, 86445 SDslu, 113568 SDs, 0 SdLazy, 20416 SolverSat, 11932 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10604.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17415 GetRequests, 12241 SyntacticMatches, 0 SemanticMatches, 5174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45358 ImplicationChecksByTransitivity, 45793.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3708occurred in iteration=141, InterpolantAutomatonStates: 3938, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54379.9ms AutomataMinimizationTime, 146 MinimizatonAttempts, 103736 StatesRemovedByMinimization, 146 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1502.1ms SsaConstructionTime, 3624.5ms SatisfiabilityAnalysisTime, 31401.8ms InterpolantComputationTime, 24764 NumberOfCodeBlocks, 24758 NumberOfCodeBlocksAsserted, 708 NumberOfCheckSat, 24477 ConstructedInterpolants, 0 QuantifiedInterpolants, 100793 SizeOfPredicates, 1742 NumberOfNonLiveVariables, 26312 ConjunctsInSsa, 2540 ConjunctsInUnsatCore, 287 InterpolantComputations, 7 PerfectInterpolantSequences, 34/35110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown