/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:37:29,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:37:29,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:37:29,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:37:29,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:37:29,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:37:29,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:37:29,884 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-Separate.epf [2021-05-21 21:37:29,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:37:29,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:37:29,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:37:29,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:37:29,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:37:29,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:37:29,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:37:29,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:37:29,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:37:29,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:37:29,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:37:29,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:37:29,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:37:29,932 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-21 21:37:29,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:37:30,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:37:30,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:37:30,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:37:30,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 21:37:30,264 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 21:37:30,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-05-21 21:37:30,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d24e4ea74/cfeaae533f2d403f9ad9dde8e42315be/FLAGc028198a4 [2021-05-21 21:37:30,837 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 21:37:30,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-05-21 21:37:30,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d24e4ea74/cfeaae533f2d403f9ad9dde8e42315be/FLAGc028198a4 [2021-05-21 21:37:31,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d24e4ea74/cfeaae533f2d403f9ad9dde8e42315be [2021-05-21 21:37:31,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:37:31,300 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 21:37:31,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 21:37:31,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 21:37:31,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 21:37:31,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f652dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31, skipping insertion in model container [2021-05-21 21:37:31,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 21:37:31,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 21:37:31,661 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-05-21 21:37:31,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:37:31,674 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 21:37:31,714 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-05-21 21:37:31,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:37:31,778 INFO L208 MainTranslator]: Completed translation [2021-05-21 21:37:31,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31 WrapperNode [2021-05-21 21:37:31,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 21:37:31,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:37:31,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:37:31,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:37:31,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:37:31,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:37:31,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:37:31,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:37:31,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (1/1) ... [2021-05-21 21:37:31,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:37:31,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:37:31,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:37:31,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:37:31,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (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 [2021-05-21 21:37:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 21:37:31,934 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 21:37:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 21:37:31,935 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 21:37:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 21:37:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 21:37:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 21:37:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 21:37:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 21:37:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 21:37:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:37:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:37:31,938 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:37:32,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:37:32,343 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 21:37:32,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:37:32 BoogieIcfgContainer [2021-05-21 21:37:32,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:37:32,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:37:32,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:37:32,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:37:32,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 09:37:31" (1/3) ... [2021-05-21 21:37:32,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeb46dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:37:32, skipping insertion in model container [2021-05-21 21:37:32,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:31" (2/3) ... [2021-05-21 21:37:32,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeb46dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:37:32, skipping insertion in model container [2021-05-21 21:37:32,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:37:32" (3/3) ... [2021-05-21 21:37:32,353 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-05-21 21:37:32,358 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:37:32,358 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:37:32,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:37:32,359 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:37:32,392 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,393 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,394 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,395 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,395 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,395 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,396 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,397 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,397 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,398 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,398 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,398 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,400 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,400 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,400 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,400 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,403 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,403 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,408 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,408 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,408 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,408 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,408 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,409 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,414 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,414 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,414 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,415 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:32,417 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 21:37:32,440 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-21 21:37:32,467 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:37:32,467 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:37:32,467 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:37:32,467 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:37:32,467 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:37:32,467 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:37:32,467 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:37:32,468 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:37:32,479 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 21:37:32,594 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:37:32,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:32,625 INFO L521 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] [2021-05-21 21:37:32,626 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-05-21 21:37:32,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:32,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92237667] [2021-05-21 21:37:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:32,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:32,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92237667] [2021-05-21 21:37:32,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92237667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:32,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:32,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:37:32,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84098948] [2021-05-21 21:37:32,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:37:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:37:32,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:37:33,005 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 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) [2021-05-21 21:37:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:33,196 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-05-21 21:37:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:37:33,198 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 [2021-05-21 21:37:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:33,218 INFO L225 Difference]: With dead ends: 3996 [2021-05-21 21:37:33,219 INFO L226 Difference]: Without dead ends: 1425 [2021-05-21 21:37:33,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-05-21 21:37:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-05-21 21:37:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-05-21 21:37:33,318 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-05-21 21:37:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:33,318 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-05-21 21:37:33,319 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) [2021-05-21 21:37:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-05-21 21:37:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:37:33,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:33,322 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:37:33,323 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-05-21 21:37:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:33,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133354354] [2021-05-21 21:37:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:33,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:33,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133354354] [2021-05-21 21:37:33,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133354354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:33,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:33,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:37:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212378386] [2021-05-21 21:37:33,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:37:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:37:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:37:33,446 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:33,588 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-05-21 21:37:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:37:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:37:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:33,602 INFO L225 Difference]: With dead ends: 2025 [2021-05-21 21:37:33,602 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 21:37:33,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:37:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 21:37:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-05-21 21:37:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-05-21 21:37:33,651 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-05-21 21:37:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:33,652 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-05-21 21:37:33,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-05-21 21:37:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:37:33,655 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:33,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:33,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:37:33,656 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-05-21 21:37:33,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:33,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130431007] [2021-05-21 21:37:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:33,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:33,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130431007] [2021-05-21 21:37:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130431007] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:33,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:33,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:37:33,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124809209] [2021-05-21 21:37:33,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:37:33,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:33,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:37:33,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:37:33,792 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:33,926 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-05-21 21:37:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:37:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:37:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:33,934 INFO L225 Difference]: With dead ends: 2062 [2021-05-21 21:37:33,935 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 21:37:33,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:37:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 21:37:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-05-21 21:37:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-05-21 21:37:33,975 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-05-21 21:37:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:33,975 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-05-21 21:37:33,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-05-21 21:37:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:37:33,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:33,979 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:33,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:37:33,979 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-05-21 21:37:33,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:33,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056958050] [2021-05-21 21:37:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:34,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:34,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056958050] [2021-05-21 21:37:34,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056958050] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:34,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:34,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:37:34,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809693782] [2021-05-21 21:37:34,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:37:34,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:34,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:37:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:37:34,123 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:34,244 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-05-21 21:37:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:37:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:37:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:34,259 INFO L225 Difference]: With dead ends: 2318 [2021-05-21 21:37:34,259 INFO L226 Difference]: Without dead ends: 1987 [2021-05-21 21:37:34,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:37:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-05-21 21:37:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-05-21 21:37:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-05-21 21:37:34,305 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-05-21 21:37:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:34,307 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-05-21 21:37:34,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-05-21 21:37:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:37:34,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:34,310 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:34,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:37:34,310 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-05-21 21:37:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:34,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841025310] [2021-05-21 21:37:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:34,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:34,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841025310] [2021-05-21 21:37:34,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841025310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:34,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:34,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:37:34,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162718007] [2021-05-21 21:37:34,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:37:34,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:34,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:37:34,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:37:34,439 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:34,526 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-05-21 21:37:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:37:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 21:37:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:34,537 INFO L225 Difference]: With dead ends: 2203 [2021-05-21 21:37:34,537 INFO L226 Difference]: Without dead ends: 2051 [2021-05-21 21:37:34,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-05-21 21:37:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-05-21 21:37:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-05-21 21:37:34,584 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-05-21 21:37:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:34,584 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-05-21 21:37:34,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-05-21 21:37:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:37:34,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:34,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:34,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:37:34,587 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-05-21 21:37:34,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:34,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144875949] [2021-05-21 21:37:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:34,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:34,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144875949] [2021-05-21 21:37:34,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144875949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:34,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:34,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:37:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354443143] [2021-05-21 21:37:34,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:37:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:37:34,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:37:34,705 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:34,907 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-05-21 21:37:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:37:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 21:37:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:34,920 INFO L225 Difference]: With dead ends: 2907 [2021-05-21 21:37:34,920 INFO L226 Difference]: Without dead ends: 2461 [2021-05-21 21:37:34,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-05-21 21:37:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-05-21 21:37:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-05-21 21:37:35,003 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-05-21 21:37:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:35,003 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-05-21 21:37:35,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-05-21 21:37:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:37:35,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:35,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:35,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:37:35,007 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-05-21 21:37:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:35,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829318574] [2021-05-21 21:37:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:35,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829318574] [2021-05-21 21:37:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829318574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:35,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:35,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:37:35,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247119987] [2021-05-21 21:37:35,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:37:35,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:37:35,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:37:35,096 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:35,264 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-05-21 21:37:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:37:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 21:37:35,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:35,279 INFO L225 Difference]: With dead ends: 3149 [2021-05-21 21:37:35,280 INFO L226 Difference]: Without dead ends: 2834 [2021-05-21 21:37:35,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-05-21 21:37:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-05-21 21:37:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-05-21 21:37:35,358 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-05-21 21:37:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:35,358 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-05-21 21:37:35,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-05-21 21:37:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:35,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:35,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:35,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 21:37:35,363 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-05-21 21:37:35,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:35,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755140470] [2021-05-21 21:37:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:35,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:35,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755140470] [2021-05-21 21:37:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755140470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922808101] [2021-05-21 21:37:35,496 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 [2021-05-21 21:37:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:35,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922808101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:35,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:35,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:35,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783391813] [2021-05-21 21:37:35,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:35,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:35,928 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 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) [2021-05-21 21:37:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:36,136 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-05-21 21:37:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:37:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:37:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:36,155 INFO L225 Difference]: With dead ends: 3261 [2021-05-21 21:37:36,155 INFO L226 Difference]: Without dead ends: 2781 [2021-05-21 21:37:36,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:37:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-05-21 21:37:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-05-21 21:37:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-05-21 21:37:36,241 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-05-21 21:37:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:36,241 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-05-21 21:37:36,242 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) [2021-05-21 21:37:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-05-21 21:37:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:36,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:36,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:36,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 21:37:36,457 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-05-21 21:37:36,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:36,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474736761] [2021-05-21 21:37:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:36,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:36,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474736761] [2021-05-21 21:37:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474736761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:36,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912065332] [2021-05-21 21:37:36,579 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 [2021-05-21 21:37:36,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:36,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:36,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:36,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912065332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:36,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:36,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105649144] [2021-05-21 21:37:36,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:36,873 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 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) [2021-05-21 21:37:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:37,047 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-05-21 21:37:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:37:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:37:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:37,055 INFO L225 Difference]: With dead ends: 3013 [2021-05-21 21:37:37,055 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 21:37:37,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:37:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 21:37:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-05-21 21:37:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-05-21 21:37:37,109 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-05-21 21:37:37,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:37,110 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-05-21 21:37:37,110 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) [2021-05-21 21:37:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-05-21 21:37:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:37,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:37,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:37,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:37,329 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-05-21 21:37:37,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:37,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734444770] [2021-05-21 21:37:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:37,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:37,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734444770] [2021-05-21 21:37:37,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734444770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:37,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001139774] [2021-05-21 21:37:37,424 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 [2021-05-21 21:37:37,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:37:37,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:37,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:37,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001139774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:37,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:37,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476908902] [2021-05-21 21:37:37,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:37,686 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 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) [2021-05-21 21:37:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:37,940 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-05-21 21:37:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:37,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:37:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:37,951 INFO L225 Difference]: With dead ends: 3525 [2021-05-21 21:37:37,951 INFO L226 Difference]: Without dead ends: 3045 [2021-05-21 21:37:37,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-05-21 21:37:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-05-21 21:37:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-05-21 21:37:38,007 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-05-21 21:37:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:38,007 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-05-21 21:37:38,007 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) [2021-05-21 21:37:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-05-21 21:37:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:38,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:38,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:38,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 21:37:38,233 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-05-21 21:37:38,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:38,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930222227] [2021-05-21 21:37:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:38,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:38,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930222227] [2021-05-21 21:37:38,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930222227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:38,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094561483] [2021-05-21 21:37:38,320 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 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 [2021-05-21 21:37:38,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:38,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:38,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:38,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:38,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094561483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:38,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:38,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:38,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528006110] [2021-05-21 21:37:38,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:38,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:38,613 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 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) [2021-05-21 21:37:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:38,986 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-05-21 21:37:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:37:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:37:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:39,009 INFO L225 Difference]: With dead ends: 4570 [2021-05-21 21:37:39,009 INFO L226 Difference]: Without dead ends: 3833 [2021-05-21 21:37:39,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-05-21 21:37:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-05-21 21:37:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-05-21 21:37:39,073 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-05-21 21:37:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:39,073 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-05-21 21:37:39,073 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) [2021-05-21 21:37:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-05-21 21:37:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:39,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:39,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:39,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:39,293 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-05-21 21:37:39,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:39,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640608453] [2021-05-21 21:37:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:39,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:39,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640608453] [2021-05-21 21:37:39,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640608453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:39,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259841099] [2021-05-21 21:37:39,367 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 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 [2021-05-21 21:37:39,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:39,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:39,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259841099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:39,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:39,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996225507] [2021-05-21 21:37:39,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:39,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:39,635 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 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) [2021-05-21 21:37:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:39,914 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-05-21 21:37:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:37:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:37:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:39,923 INFO L225 Difference]: With dead ends: 4350 [2021-05-21 21:37:39,923 INFO L226 Difference]: Without dead ends: 3958 [2021-05-21 21:37:39,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:37:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-05-21 21:37:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-05-21 21:37:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-05-21 21:37:39,987 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-05-21 21:37:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:39,988 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-05-21 21:37:39,988 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) [2021-05-21 21:37:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-05-21 21:37:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:39,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:39,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:40,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:40,216 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-05-21 21:37:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:40,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333642266] [2021-05-21 21:37:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:40,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:40,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333642266] [2021-05-21 21:37:40,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333642266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:40,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905461384] [2021-05-21 21:37:40,296 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 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 [2021-05-21 21:37:40,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:37:40,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:40,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905461384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:40,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:40,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:40,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106818208] [2021-05-21 21:37:40,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:40,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:40,530 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 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) [2021-05-21 21:37:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:41,187 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-05-21 21:37:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:37:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:37:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:41,197 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 21:37:41,197 INFO L226 Difference]: Without dead ends: 4898 [2021-05-21 21:37:41,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:37:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-05-21 21:37:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-05-21 21:37:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-05-21 21:37:41,278 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-05-21 21:37:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:41,278 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-05-21 21:37:41,278 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) [2021-05-21 21:37:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-05-21 21:37:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:41,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:41,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:41,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:41,506 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-05-21 21:37:41,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:41,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353603803] [2021-05-21 21:37:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:41,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353603803] [2021-05-21 21:37:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353603803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739807657] [2021-05-21 21:37:41,614 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 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 [2021-05-21 21:37:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:41,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739807657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:41,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:41,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565521303] [2021-05-21 21:37:41,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:41,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:41,902 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:42,104 INFO L93 Difference]: Finished difference Result 4071 states and 10562 transitions. [2021-05-21 21:37:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:37:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:42,112 INFO L225 Difference]: With dead ends: 4071 [2021-05-21 21:37:42,113 INFO L226 Difference]: Without dead ends: 3919 [2021-05-21 21:37:42,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:37:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2021-05-21 21:37:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 2867. [2021-05-21 21:37:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2866 states have (on average 2.7079553384508026) internal successors, (7761), 2866 states have internal predecessors, (7761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 7761 transitions. [2021-05-21 21:37:42,174 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 7761 transitions. Word has length 52 [2021-05-21 21:37:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:42,174 INFO L482 AbstractCegarLoop]: Abstraction has 2867 states and 7761 transitions. [2021-05-21 21:37:42,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 7761 transitions. [2021-05-21 21:37:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:42,179 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:42,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:42,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:37:42,403 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-05-21 21:37:42,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:42,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697028885] [2021-05-21 21:37:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:42,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:42,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697028885] [2021-05-21 21:37:42,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697028885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:42,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122972734] [2021-05-21 21:37:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 21:37:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:42,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122972734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:42,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:42,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:42,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898368007] [2021-05-21 21:37:42,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:42,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:42,783 INFO L87 Difference]: Start difference. First operand 2867 states and 7761 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:43,001 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-05-21 21:37:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:37:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:43,008 INFO L225 Difference]: With dead ends: 4087 [2021-05-21 21:37:43,009 INFO L226 Difference]: Without dead ends: 3935 [2021-05-21 21:37:43,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-05-21 21:37:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2917. [2021-05-21 21:37:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 2.6992455418381343) internal successors, (7871), 2916 states have internal predecessors, (7871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 7871 transitions. [2021-05-21 21:37:43,064 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 7871 transitions. Word has length 52 [2021-05-21 21:37:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:43,064 INFO L482 AbstractCegarLoop]: Abstraction has 2917 states and 7871 transitions. [2021-05-21 21:37:43,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 7871 transitions. [2021-05-21 21:37:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:43,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:43,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:43,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:37:43,293 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-05-21 21:37:43,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:43,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853214557] [2021-05-21 21:37:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:43,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:43,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853214557] [2021-05-21 21:37:43,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853214557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:43,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554433801] [2021-05-21 21:37:43,384 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 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 [2021-05-21 21:37:43,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:43,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554433801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:43,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:43,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:43,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241780271] [2021-05-21 21:37:43,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:43,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:43,639 INFO L87 Difference]: Start difference. First operand 2917 states and 7871 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:43,821 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-05-21 21:37:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:37:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:43,829 INFO L225 Difference]: With dead ends: 3927 [2021-05-21 21:37:43,829 INFO L226 Difference]: Without dead ends: 3775 [2021-05-21 21:37:43,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:37:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-05-21 21:37:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2916. [2021-05-21 21:37:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 2.697770154373928) internal successors, (7864), 2915 states have internal predecessors, (7864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 7864 transitions. [2021-05-21 21:37:43,888 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 7864 transitions. Word has length 52 [2021-05-21 21:37:43,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:43,888 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 7864 transitions. [2021-05-21 21:37:43,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 7864 transitions. [2021-05-21 21:37:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:43,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:43,892 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:44,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:37:44,109 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:44,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-05-21 21:37:44,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:44,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899748095] [2021-05-21 21:37:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:44,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:44,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899748095] [2021-05-21 21:37:44,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899748095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:44,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351868537] [2021-05-21 21:37:44,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:44,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:44,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351868537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:44,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:44,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:44,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557931955] [2021-05-21 21:37:44,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:44,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:44,460 INFO L87 Difference]: Start difference. First operand 2916 states and 7864 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:44,670 INFO L93 Difference]: Finished difference Result 4236 states and 10907 transitions. [2021-05-21 21:37:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:37:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:44,679 INFO L225 Difference]: With dead ends: 4236 [2021-05-21 21:37:44,679 INFO L226 Difference]: Without dead ends: 4084 [2021-05-21 21:37:44,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2021-05-21 21:37:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 2891. [2021-05-21 21:37:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2890 states have (on average 2.702076124567474) internal successors, (7809), 2890 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 7809 transitions. [2021-05-21 21:37:44,737 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 7809 transitions. Word has length 52 [2021-05-21 21:37:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:44,738 INFO L482 AbstractCegarLoop]: Abstraction has 2891 states and 7809 transitions. [2021-05-21 21:37:44,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 7809 transitions. [2021-05-21 21:37:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:44,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:44,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:44,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 21:37:44,957 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-05-21 21:37:44,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:44,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525913970] [2021-05-21 21:37:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:45,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:45,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525913970] [2021-05-21 21:37:45,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525913970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:45,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133202427] [2021-05-21 21:37:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:45,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:37:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:45,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133202427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:45,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:45,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:45,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157557975] [2021-05-21 21:37:45,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:45,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:45,275 INFO L87 Difference]: Start difference. First operand 2891 states and 7809 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:45,599 INFO L93 Difference]: Finished difference Result 5047 states and 13218 transitions. [2021-05-21 21:37:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:37:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:45,606 INFO L225 Difference]: With dead ends: 5047 [2021-05-21 21:37:45,607 INFO L226 Difference]: Without dead ends: 4743 [2021-05-21 21:37:45,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2021-05-21 21:37:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 3086. [2021-05-21 21:37:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3085 states have (on average 2.7354943273905996) internal successors, (8439), 3085 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 8439 transitions. [2021-05-21 21:37:45,676 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 8439 transitions. Word has length 52 [2021-05-21 21:37:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:45,677 INFO L482 AbstractCegarLoop]: Abstraction has 3086 states and 8439 transitions. [2021-05-21 21:37:45,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 8439 transitions. [2021-05-21 21:37:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:45,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:45,681 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:45,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 21:37:45,905 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-05-21 21:37:45,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:45,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441202671] [2021-05-21 21:37:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:45,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441202671] [2021-05-21 21:37:45,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441202671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034330582] [2021-05-21 21:37:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:46,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:46,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:46,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:46,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034330582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:46,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:46,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:46,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177405745] [2021-05-21 21:37:46,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:46,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:46,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:46,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:46,273 INFO L87 Difference]: Start difference. First operand 3086 states and 8439 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:46,863 INFO L93 Difference]: Finished difference Result 6180 states and 16594 transitions. [2021-05-21 21:37:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:37:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:46,870 INFO L225 Difference]: With dead ends: 6180 [2021-05-21 21:37:46,871 INFO L226 Difference]: Without dead ends: 5504 [2021-05-21 21:37:46,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:37:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2021-05-21 21:37:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3235. [2021-05-21 21:37:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-05-21 21:37:46,947 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-05-21 21:37:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:46,948 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-05-21 21:37:46,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-05-21 21:37:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:46,952 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:46,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:47,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:47,166 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-05-21 21:37:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:47,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073619123] [2021-05-21 21:37:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:47,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073619123] [2021-05-21 21:37:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073619123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426378983] [2021-05-21 21:37:47,250 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 [2021-05-21 21:37:47,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:37:47,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:47,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426378983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:47,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:47,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:47,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593748071] [2021-05-21 21:37:47,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:47,473 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:47,805 INFO L93 Difference]: Finished difference Result 5014 states and 13181 transitions. [2021-05-21 21:37:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:37:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:47,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:47,812 INFO L225 Difference]: With dead ends: 5014 [2021-05-21 21:37:47,812 INFO L226 Difference]: Without dead ends: 4862 [2021-05-21 21:37:47,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:37:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-05-21 21:37:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 3275. [2021-05-21 21:37:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 2.775809407452657) internal successors, (9088), 3274 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-05-21 21:37:47,897 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-05-21 21:37:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:47,897 INFO L482 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-05-21 21:37:47,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-05-21 21:37:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:47,902 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:47,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:48,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 21:37:48,117 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-05-21 21:37:48,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:48,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604466668] [2021-05-21 21:37:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:48,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604466668] [2021-05-21 21:37:48,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604466668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628766362] [2021-05-21 21:37:48,208 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 [2021-05-21 21:37:48,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:48,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:48,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628766362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:48,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:48,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:48,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425262190] [2021-05-21 21:37:48,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:48,460 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:48,792 INFO L93 Difference]: Finished difference Result 5278 states and 14184 transitions. [2021-05-21 21:37:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:37:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:48,805 INFO L225 Difference]: With dead ends: 5278 [2021-05-21 21:37:48,805 INFO L226 Difference]: Without dead ends: 5126 [2021-05-21 21:37:48,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-05-21 21:37:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3363. [2021-05-21 21:37:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-05-21 21:37:48,877 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-05-21 21:37:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:48,877 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-05-21 21:37:48,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-05-21 21:37:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:48,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:48,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:49,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:49,097 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-05-21 21:37:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:49,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452318221] [2021-05-21 21:37:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:49,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452318221] [2021-05-21 21:37:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452318221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213982455] [2021-05-21 21:37:49,173 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 [2021-05-21 21:37:49,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:37:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213982455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:49,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:49,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:49,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359543045] [2021-05-21 21:37:49,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:49,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:49,395 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:49,964 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-05-21 21:37:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:37:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:49,970 INFO L225 Difference]: With dead ends: 6683 [2021-05-21 21:37:49,971 INFO L226 Difference]: Without dead ends: 6253 [2021-05-21 21:37:49,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:37:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-05-21 21:37:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-05-21 21:37:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-05-21 21:37:50,039 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-05-21 21:37:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:50,039 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-05-21 21:37:50,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-05-21 21:37:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:50,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:50,043 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:50,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 21:37:50,257 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-05-21 21:37:50,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:50,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814029349] [2021-05-21 21:37:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:50,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814029349] [2021-05-21 21:37:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814029349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798206866] [2021-05-21 21:37:50,349 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 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 [2021-05-21 21:37:50,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:37:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798206866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:50,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:50,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980590626] [2021-05-21 21:37:50,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:50,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:50,600 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:50,768 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-05-21 21:37:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:37:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:50,774 INFO L225 Difference]: With dead ends: 4779 [2021-05-21 21:37:50,774 INFO L226 Difference]: Without dead ends: 4627 [2021-05-21 21:37:50,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:37:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-05-21 21:37:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-05-21 21:37:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 21:37:50,836 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 21:37:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:50,836 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 21:37:50,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 21:37:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:50,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:50,840 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:51,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:51,054 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-05-21 21:37:51,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:51,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331179278] [2021-05-21 21:37:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:51,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:51,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331179278] [2021-05-21 21:37:51,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331179278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:51,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013262713] [2021-05-21 21:37:51,148 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 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 [2021-05-21 21:37:51,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:37:51,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:51,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013262713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:51,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:51,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469784389] [2021-05-21 21:37:51,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:51,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:51,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:51,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:51,412 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:51,633 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-05-21 21:37:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:37:51,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:51,638 INFO L225 Difference]: With dead ends: 4955 [2021-05-21 21:37:51,639 INFO L226 Difference]: Without dead ends: 4803 [2021-05-21 21:37:51,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:37:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-05-21 21:37:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-05-21 21:37:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 21:37:51,699 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 21:37:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:51,700 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 21:37:51,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 21:37:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:51,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:51,703 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:51,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 21:37:51,904 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-05-21 21:37:51,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:51,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377538166] [2021-05-21 21:37:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:51,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:51,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377538166] [2021-05-21 21:37:51,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377538166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:51,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858515165] [2021-05-21 21:37:51,992 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 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 [2021-05-21 21:37:52,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:37:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:52,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858515165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:52,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:52,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:52,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736671634] [2021-05-21 21:37:52,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:52,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:52,250 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:52,505 INFO L93 Difference]: Finished difference Result 5019 states and 13181 transitions. [2021-05-21 21:37:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:37:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:52,512 INFO L225 Difference]: With dead ends: 5019 [2021-05-21 21:37:52,512 INFO L226 Difference]: Without dead ends: 4867 [2021-05-21 21:37:52,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:37:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2021-05-21 21:37:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 3557. [2021-05-21 21:37:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3556 states have (on average 2.7455005624296964) internal successors, (9763), 3556 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 9763 transitions. [2021-05-21 21:37:52,576 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 9763 transitions. Word has length 57 [2021-05-21 21:37:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:52,576 INFO L482 AbstractCegarLoop]: Abstraction has 3557 states and 9763 transitions. [2021-05-21 21:37:52,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 9763 transitions. [2021-05-21 21:37:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:52,580 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:52,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:52,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:37:52,780 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-05-21 21:37:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:52,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601464267] [2021-05-21 21:37:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:52,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:52,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601464267] [2021-05-21 21:37:52,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601464267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:52,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227453079] [2021-05-21 21:37:52,869 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 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 [2021-05-21 21:37:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:53,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227453079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:53,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:53,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:53,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660657958] [2021-05-21 21:37:53,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:53,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:53,139 INFO L87 Difference]: Start difference. First operand 3557 states and 9763 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:53,407 INFO L93 Difference]: Finished difference Result 4869 states and 12883 transitions. [2021-05-21 21:37:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:37:53,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:53,412 INFO L225 Difference]: With dead ends: 4869 [2021-05-21 21:37:53,412 INFO L226 Difference]: Without dead ends: 4717 [2021-05-21 21:37:53,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:37:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2021-05-21 21:37:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 3522. [2021-05-21 21:37:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 2.750923033229196) internal successors, (9686), 3521 states have internal predecessors, (9686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 9686 transitions. [2021-05-21 21:37:53,469 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 9686 transitions. Word has length 57 [2021-05-21 21:37:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:53,469 INFO L482 AbstractCegarLoop]: Abstraction has 3522 states and 9686 transitions. [2021-05-21 21:37:53,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 9686 transitions. [2021-05-21 21:37:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:53,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:53,474 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:53,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:37:53,689 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-05-21 21:37:53,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:53,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431826242] [2021-05-21 21:37:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:53,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:53,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431826242] [2021-05-21 21:37:53,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431826242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:53,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612594474] [2021-05-21 21:37:53,777 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 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 [2021-05-21 21:37:53,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:54,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612594474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:54,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:54,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:54,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53634166] [2021-05-21 21:37:54,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:54,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:54,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:54,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:54,034 INFO L87 Difference]: Start difference. First operand 3522 states and 9686 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:54,303 INFO L93 Difference]: Finished difference Result 5051 states and 13245 transitions. [2021-05-21 21:37:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:54,308 INFO L225 Difference]: With dead ends: 5051 [2021-05-21 21:37:54,309 INFO L226 Difference]: Without dead ends: 4899 [2021-05-21 21:37:54,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:37:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-05-21 21:37:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 3627. [2021-05-21 21:37:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.7349696635410923) internal successors, (9917), 3626 states have internal predecessors, (9917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 9917 transitions. [2021-05-21 21:37:54,364 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 9917 transitions. Word has length 57 [2021-05-21 21:37:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:54,364 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 9917 transitions. [2021-05-21 21:37:54,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 9917 transitions. [2021-05-21 21:37:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:54,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:54,370 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:54,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 21:37:54,581 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-05-21 21:37:54,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:54,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686957745] [2021-05-21 21:37:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:54,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:54,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686957745] [2021-05-21 21:37:54,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686957745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351028526] [2021-05-21 21:37:54,682 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 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 [2021-05-21 21:37:54,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:37:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351028526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:54,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:54,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429226771] [2021-05-21 21:37:54,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:54,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:54,955 INFO L87 Difference]: Start difference. First operand 3627 states and 9917 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:55,269 INFO L93 Difference]: Finished difference Result 5155 states and 13453 transitions. [2021-05-21 21:37:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:37:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:55,275 INFO L225 Difference]: With dead ends: 5155 [2021-05-21 21:37:55,275 INFO L226 Difference]: Without dead ends: 5003 [2021-05-21 21:37:55,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-05-21 21:37:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 3611. [2021-05-21 21:37:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 2.735180055401662) internal successors, (9874), 3610 states have internal predecessors, (9874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 9874 transitions. [2021-05-21 21:37:55,335 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 9874 transitions. Word has length 57 [2021-05-21 21:37:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:55,335 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 9874 transitions. [2021-05-21 21:37:55,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 9874 transitions. [2021-05-21 21:37:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:55,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:55,339 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:55,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:37:55,548 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-05-21 21:37:55,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:55,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823045318] [2021-05-21 21:37:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:55,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:55,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823045318] [2021-05-21 21:37:55,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823045318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:55,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958151455] [2021-05-21 21:37:55,634 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 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 [2021-05-21 21:37:55,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:55,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958151455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:55,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:55,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158671158] [2021-05-21 21:37:55,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:55,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:55,902 INFO L87 Difference]: Start difference. First operand 3611 states and 9874 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:56,204 INFO L93 Difference]: Finished difference Result 5139 states and 13421 transitions. [2021-05-21 21:37:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:37:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:56,211 INFO L225 Difference]: With dead ends: 5139 [2021-05-21 21:37:56,211 INFO L226 Difference]: Without dead ends: 4987 [2021-05-21 21:37:56,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:37:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-05-21 21:37:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3556. [2021-05-21 21:37:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.7443037974683544) internal successors, (9756), 3555 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9756 transitions. [2021-05-21 21:37:56,267 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9756 transitions. Word has length 57 [2021-05-21 21:37:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:56,267 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9756 transitions. [2021-05-21 21:37:56,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9756 transitions. [2021-05-21 21:37:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:56,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:56,271 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:56,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:56,485 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-05-21 21:37:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:56,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26045676] [2021-05-21 21:37:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:56,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:56,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26045676] [2021-05-21 21:37:56,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26045676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:56,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011404663] [2021-05-21 21:37:56,603 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 [2021-05-21 21:37:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:56,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:56,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011404663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:56,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:56,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:56,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040331473] [2021-05-21 21:37:56,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:56,837 INFO L87 Difference]: Start difference. First operand 3556 states and 9756 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:57,024 INFO L93 Difference]: Finished difference Result 4988 states and 13124 transitions. [2021-05-21 21:37:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:37:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:57,029 INFO L225 Difference]: With dead ends: 4988 [2021-05-21 21:37:57,029 INFO L226 Difference]: Without dead ends: 4836 [2021-05-21 21:37:57,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-05-21 21:37:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3606. [2021-05-21 21:37:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.736754507628294) internal successors, (9866), 3605 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9866 transitions. [2021-05-21 21:37:57,080 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9866 transitions. Word has length 57 [2021-05-21 21:37:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:57,080 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9866 transitions. [2021-05-21 21:37:57,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9866 transitions. [2021-05-21 21:37:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:57,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:57,084 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:57,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 21:37:57,284 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-05-21 21:37:57,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:57,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042545390] [2021-05-21 21:37:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:57,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:57,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042545390] [2021-05-21 21:37:57,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042545390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:57,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596071600] [2021-05-21 21:37:57,373 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 [2021-05-21 21:37:57,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:57,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:57,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:57,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596071600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:57,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:57,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:57,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738147240] [2021-05-21 21:37:57,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:57,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:57,603 INFO L87 Difference]: Start difference. First operand 3606 states and 9866 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:57,822 INFO L93 Difference]: Finished difference Result 5229 states and 13611 transitions. [2021-05-21 21:37:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:57,827 INFO L225 Difference]: With dead ends: 5229 [2021-05-21 21:37:57,827 INFO L226 Difference]: Without dead ends: 5077 [2021-05-21 21:37:57,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:37:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5077 states. [2021-05-21 21:37:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5077 to 3606. [2021-05-21 21:37:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.736754507628294) internal successors, (9866), 3605 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9866 transitions. [2021-05-21 21:37:57,870 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9866 transitions. Word has length 57 [2021-05-21 21:37:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:57,871 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9866 transitions. [2021-05-21 21:37:57,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9866 transitions. [2021-05-21 21:37:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:57,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:57,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:58,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:58,096 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-05-21 21:37:58,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:58,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359450778] [2021-05-21 21:37:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:58,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:58,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359450778] [2021-05-21 21:37:58,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359450778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:58,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654079134] [2021-05-21 21:37:58,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:58,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:37:58,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:58,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654079134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:58,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:58,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:58,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917259050] [2021-05-21 21:37:58,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:58,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:58,409 INFO L87 Difference]: Start difference. First operand 3606 states and 9866 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:58,732 INFO L93 Difference]: Finished difference Result 5364 states and 13876 transitions. [2021-05-21 21:37:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:37:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:58,736 INFO L225 Difference]: With dead ends: 5364 [2021-05-21 21:37:58,736 INFO L226 Difference]: Without dead ends: 5212 [2021-05-21 21:37:58,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:37:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2021-05-21 21:37:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 3606. [2021-05-21 21:37:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.736754507628294) internal successors, (9866), 3605 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9866 transitions. [2021-05-21 21:37:58,777 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9866 transitions. Word has length 57 [2021-05-21 21:37:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:58,777 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9866 transitions. [2021-05-21 21:37:58,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9866 transitions. [2021-05-21 21:37:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:58,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:58,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:58,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 21:37:58,981 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-05-21 21:37:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110617448] [2021-05-21 21:37:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:59,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:59,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110617448] [2021-05-21 21:37:59,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110617448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:59,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143775557] [2021-05-21 21:37:59,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:59,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:37:59,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:59,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143775557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:59,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:59,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:59,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329831611] [2021-05-21 21:37:59,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:59,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:59,299 INFO L87 Difference]: Start difference. First operand 3606 states and 9866 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:59,544 INFO L93 Difference]: Finished difference Result 5139 states and 13421 transitions. [2021-05-21 21:37:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:37:59,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:37:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:59,550 INFO L225 Difference]: With dead ends: 5139 [2021-05-21 21:37:59,550 INFO L226 Difference]: Without dead ends: 4987 [2021-05-21 21:37:59,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:37:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-05-21 21:37:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3531. [2021-05-21 21:37:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.7481586402266287) internal successors, (9701), 3530 states have internal predecessors, (9701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9701 transitions. [2021-05-21 21:37:59,596 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9701 transitions. Word has length 57 [2021-05-21 21:37:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:59,596 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9701 transitions. [2021-05-21 21:37:59,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9701 transitions. [2021-05-21 21:37:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:59,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:59,600 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:59,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:59,817 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-05-21 21:37:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:59,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446064341] [2021-05-21 21:37:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:37:59,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:59,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446064341] [2021-05-21 21:37:59,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446064341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:59,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725095409] [2021-05-21 21:37:59,904 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 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 [2021-05-21 21:37:59,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:37:59,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:00,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725095409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:00,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:00,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:00,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934608727] [2021-05-21 21:38:00,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:00,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:00,134 INFO L87 Difference]: Start difference. First operand 3531 states and 9701 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:00,323 INFO L93 Difference]: Finished difference Result 5043 states and 13259 transitions. [2021-05-21 21:38:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:38:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:00,328 INFO L225 Difference]: With dead ends: 5043 [2021-05-21 21:38:00,328 INFO L226 Difference]: Without dead ends: 4891 [2021-05-21 21:38:00,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:38:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-05-21 21:38:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-05-21 21:38:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.7443037974683544) internal successors, (9756), 3555 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9756 transitions. [2021-05-21 21:38:00,381 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9756 transitions. Word has length 57 [2021-05-21 21:38:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:00,381 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9756 transitions. [2021-05-21 21:38:00,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9756 transitions. [2021-05-21 21:38:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:00,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:00,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:00,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 21:38:00,585 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-05-21 21:38:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:00,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111840888] [2021-05-21 21:38:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:00,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:00,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111840888] [2021-05-21 21:38:00,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111840888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:00,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841792761] [2021-05-21 21:38:00,657 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 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 [2021-05-21 21:38:00,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:38:00,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:00,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841792761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:00,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:00,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:00,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438230237] [2021-05-21 21:38:00,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:00,914 INFO L87 Difference]: Start difference. First operand 3556 states and 9756 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:01,180 INFO L93 Difference]: Finished difference Result 5259 states and 13691 transitions. [2021-05-21 21:38:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:38:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:01,186 INFO L225 Difference]: With dead ends: 5259 [2021-05-21 21:38:01,186 INFO L226 Difference]: Without dead ends: 5107 [2021-05-21 21:38:01,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:38:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5107 states. [2021-05-21 21:38:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5107 to 3556. [2021-05-21 21:38:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.7443037974683544) internal successors, (9756), 3555 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9756 transitions. [2021-05-21 21:38:01,229 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9756 transitions. Word has length 57 [2021-05-21 21:38:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:01,229 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9756 transitions. [2021-05-21 21:38:01,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9756 transitions. [2021-05-21 21:38:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:01,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:01,232 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:01,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:01,437 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-05-21 21:38:01,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:01,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856111757] [2021-05-21 21:38:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:01,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:01,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856111757] [2021-05-21 21:38:01,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856111757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:01,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313870484] [2021-05-21 21:38:01,514 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 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 [2021-05-21 21:38:01,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:38:01,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:01,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313870484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:01,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:01,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716781261] [2021-05-21 21:38:01,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:01,728 INFO L87 Difference]: Start difference. First operand 3556 states and 9756 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:01,935 INFO L93 Difference]: Finished difference Result 5028 states and 13234 transitions. [2021-05-21 21:38:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:38:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:01,941 INFO L225 Difference]: With dead ends: 5028 [2021-05-21 21:38:01,941 INFO L226 Difference]: Without dead ends: 4876 [2021-05-21 21:38:01,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:38:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-05-21 21:38:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3531. [2021-05-21 21:38:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.7481586402266287) internal successors, (9701), 3530 states have internal predecessors, (9701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9701 transitions. [2021-05-21 21:38:02,005 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9701 transitions. Word has length 57 [2021-05-21 21:38:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:02,005 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9701 transitions. [2021-05-21 21:38:02,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9701 transitions. [2021-05-21 21:38:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:02,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:02,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:02,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 21:38:02,209 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-05-21 21:38:02,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:02,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701769680] [2021-05-21 21:38:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:02,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:02,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701769680] [2021-05-21 21:38:02,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701769680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:02,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241548297] [2021-05-21 21:38:02,304 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 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 [2021-05-21 21:38:02,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:38:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:02,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:38:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:02,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241548297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:02,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:02,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348390616] [2021-05-21 21:38:02,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:02,913 INFO L87 Difference]: Start difference. First operand 3531 states and 9701 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:03,336 INFO L93 Difference]: Finished difference Result 6802 states and 18261 transitions. [2021-05-21 21:38:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:38:03,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:03,343 INFO L225 Difference]: With dead ends: 6802 [2021-05-21 21:38:03,343 INFO L226 Difference]: Without dead ends: 6420 [2021-05-21 21:38:03,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:38:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2021-05-21 21:38:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 3531. [2021-05-21 21:38:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.7481586402266287) internal successors, (9701), 3530 states have internal predecessors, (9701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9701 transitions. [2021-05-21 21:38:03,393 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9701 transitions. Word has length 57 [2021-05-21 21:38:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:03,393 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9701 transitions. [2021-05-21 21:38:03,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9701 transitions. [2021-05-21 21:38:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:03,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:03,395 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:03,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:03,597 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:03,597 INFO L82 PathProgramCache]: Analyzing trace with hash 196144782, now seen corresponding path program 19 times [2021-05-21 21:38:03,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:03,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675607191] [2021-05-21 21:38:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:03,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:03,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675607191] [2021-05-21 21:38:03,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675607191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:03,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636101348] [2021-05-21 21:38:03,684 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 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 [2021-05-21 21:38:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:03,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636101348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:03,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:03,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:03,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743678561] [2021-05-21 21:38:03,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:03,995 INFO L87 Difference]: Start difference. First operand 3531 states and 9701 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:04,382 INFO L93 Difference]: Finished difference Result 6221 states and 16557 transitions. [2021-05-21 21:38:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:38:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:04,388 INFO L225 Difference]: With dead ends: 6221 [2021-05-21 21:38:04,388 INFO L226 Difference]: Without dead ends: 6069 [2021-05-21 21:38:04,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:38:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2021-05-21 21:38:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 3846. [2021-05-21 21:38:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3845 states have (on average 2.7843953185955788) internal successors, (10706), 3845 states have internal predecessors, (10706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 10706 transitions. [2021-05-21 21:38:04,439 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 10706 transitions. Word has length 57 [2021-05-21 21:38:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:04,439 INFO L482 AbstractCegarLoop]: Abstraction has 3846 states and 10706 transitions. [2021-05-21 21:38:04,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 10706 transitions. [2021-05-21 21:38:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:04,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:04,443 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:04,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:04,644 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:04,644 INFO L82 PathProgramCache]: Analyzing trace with hash 651669236, now seen corresponding path program 20 times [2021-05-21 21:38:04,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:04,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546307072] [2021-05-21 21:38:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:04,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546307072] [2021-05-21 21:38:04,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546307072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566031176] [2021-05-21 21:38:04,726 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 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 [2021-05-21 21:38:04,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:38:04,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566031176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:04,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:04,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:04,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341381788] [2021-05-21 21:38:04,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:04,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:04,991 INFO L87 Difference]: Start difference. First operand 3846 states and 10706 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:05,592 INFO L93 Difference]: Finished difference Result 7895 states and 21363 transitions. [2021-05-21 21:38:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:38:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:05,601 INFO L225 Difference]: With dead ends: 7895 [2021-05-21 21:38:05,601 INFO L226 Difference]: Without dead ends: 7334 [2021-05-21 21:38:05,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 580.2ms TimeCoverageRelationStatistics Valid=503, Invalid=1567, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:38:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-05-21 21:38:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 3626. [2021-05-21 21:38:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 2.763034482758621) internal successors, (10016), 3625 states have internal predecessors, (10016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 10016 transitions. [2021-05-21 21:38:05,656 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 10016 transitions. Word has length 57 [2021-05-21 21:38:05,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:05,656 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 10016 transitions. [2021-05-21 21:38:05,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 10016 transitions. [2021-05-21 21:38:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:05,660 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:05,660 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-21 21:38:05,862 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:05,862 INFO L82 PathProgramCache]: Analyzing trace with hash 374566096, now seen corresponding path program 13 times [2021-05-21 21:38:05,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:05,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779219879] [2021-05-21 21:38:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:05,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:05,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779219879] [2021-05-21 21:38:05,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779219879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:05,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449140633] [2021-05-21 21:38:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:06,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:06,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449140633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:06,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:06,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:06,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094658278] [2021-05-21 21:38:06,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:06,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:06,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:06,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:06,192 INFO L87 Difference]: Start difference. First operand 3626 states and 10016 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:06,579 INFO L93 Difference]: Finished difference Result 6190 states and 16183 transitions. [2021-05-21 21:38:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:38:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:06,585 INFO L225 Difference]: With dead ends: 6190 [2021-05-21 21:38:06,586 INFO L226 Difference]: Without dead ends: 6038 [2021-05-21 21:38:06,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:38:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-05-21 21:38:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 3991. [2021-05-21 21:38:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3990 states have (on average 2.7897243107769425) internal successors, (11131), 3990 states have internal predecessors, (11131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 11131 transitions. [2021-05-21 21:38:06,636 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 11131 transitions. Word has length 57 [2021-05-21 21:38:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:06,636 INFO L482 AbstractCegarLoop]: Abstraction has 3991 states and 11131 transitions. [2021-05-21 21:38:06,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 11131 transitions. [2021-05-21 21:38:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:06,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:06,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:06,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:06,845 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2011458500, now seen corresponding path program 14 times [2021-05-21 21:38:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581311623] [2021-05-21 21:38:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:06,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:06,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581311623] [2021-05-21 21:38:06,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581311623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:06,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148053031] [2021-05-21 21:38:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:07,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:38:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:07,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:07,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148053031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:07,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:07,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:07,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774873349] [2021-05-21 21:38:07,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:07,246 INFO L87 Difference]: Start difference. First operand 3991 states and 11131 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:07,732 INFO L93 Difference]: Finished difference Result 6467 states and 17327 transitions. [2021-05-21 21:38:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:38:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:07,740 INFO L225 Difference]: With dead ends: 6467 [2021-05-21 21:38:07,740 INFO L226 Difference]: Without dead ends: 6315 [2021-05-21 21:38:07,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:38:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2021-05-21 21:38:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 4136. [2021-05-21 21:38:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4136 states, 4135 states have (on average 2.8176541717049575) internal successors, (11651), 4135 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4136 states to 4136 states and 11651 transitions. [2021-05-21 21:38:07,797 INFO L78 Accepts]: Start accepts. Automaton has 4136 states and 11651 transitions. Word has length 57 [2021-05-21 21:38:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:07,797 INFO L482 AbstractCegarLoop]: Abstraction has 4136 states and 11651 transitions. [2021-05-21 21:38:07,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4136 states and 11651 transitions. [2021-05-21 21:38:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:07,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:07,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:08,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 21:38:08,013 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1208888960, now seen corresponding path program 15 times [2021-05-21 21:38:08,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:08,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548091362] [2021-05-21 21:38:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:08,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:08,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548091362] [2021-05-21 21:38:08,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548091362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:08,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640486720] [2021-05-21 21:38:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:08,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:38:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:08,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:08,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640486720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:08,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:08,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:38:08,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722400781] [2021-05-21 21:38:08,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:38:08,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:08,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:38:08,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:38:08,354 INFO L87 Difference]: Start difference. First operand 4136 states and 11651 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:09,086 INFO L93 Difference]: Finished difference Result 8535 states and 22890 transitions. [2021-05-21 21:38:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:38:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:09,097 INFO L225 Difference]: With dead ends: 8535 [2021-05-21 21:38:09,097 INFO L226 Difference]: Without dead ends: 7977 [2021-05-21 21:38:09,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 665.3ms TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:38:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-05-21 21:38:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 3871. [2021-05-21 21:38:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.77312661498708) internal successors, (10732), 3870 states have internal predecessors, (10732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 10732 transitions. [2021-05-21 21:38:09,182 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 10732 transitions. Word has length 57 [2021-05-21 21:38:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:09,183 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 10732 transitions. [2021-05-21 21:38:09,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 10732 transitions. [2021-05-21 21:38:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:09,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:09,187 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:09,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:09,387 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash -735082546, now seen corresponding path program 16 times [2021-05-21 21:38:09,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:09,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022377080] [2021-05-21 21:38:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:09,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022377080] [2021-05-21 21:38:09,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022377080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810683989] [2021-05-21 21:38:09,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:09,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:38:09,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:09,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810683989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:09,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:09,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229367303] [2021-05-21 21:38:09,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:09,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:09,718 INFO L87 Difference]: Start difference. First operand 3871 states and 10732 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:10,114 INFO L93 Difference]: Finished difference Result 6407 states and 16676 transitions. [2021-05-21 21:38:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 21:38:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:10,122 INFO L225 Difference]: With dead ends: 6407 [2021-05-21 21:38:10,123 INFO L226 Difference]: Without dead ends: 6255 [2021-05-21 21:38:10,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:38:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2021-05-21 21:38:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 4091. [2021-05-21 21:38:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4091 states, 4090 states have (on average 2.7863080684596575) internal successors, (11396), 4090 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 11396 transitions. [2021-05-21 21:38:10,184 INFO L78 Accepts]: Start accepts. Automaton has 4091 states and 11396 transitions. Word has length 57 [2021-05-21 21:38:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:10,184 INFO L482 AbstractCegarLoop]: Abstraction has 4091 states and 11396 transitions. [2021-05-21 21:38:10,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4091 states and 11396 transitions. [2021-05-21 21:38:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:10,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:10,189 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:10,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 21:38:10,403 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1967873632, now seen corresponding path program 17 times [2021-05-21 21:38:10,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:10,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978395804] [2021-05-21 21:38:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:10,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:10,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978395804] [2021-05-21 21:38:10,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978395804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:10,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387918009] [2021-05-21 21:38:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:10,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:38:10,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:10,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:10,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387918009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:10,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:10,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:10,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073635796] [2021-05-21 21:38:10,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:10,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:10,766 INFO L87 Difference]: Start difference. First operand 4091 states and 11396 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:11,333 INFO L93 Difference]: Finished difference Result 6662 states and 17181 transitions. [2021-05-21 21:38:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:38:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:11,343 INFO L225 Difference]: With dead ends: 6662 [2021-05-21 21:38:11,343 INFO L226 Difference]: Without dead ends: 6510 [2021-05-21 21:38:11,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:38:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-05-21 21:38:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 4144. [2021-05-21 21:38:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 2.7859039343470915) internal successors, (11542), 4143 states have internal predecessors, (11542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 11542 transitions. [2021-05-21 21:38:11,421 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 11542 transitions. Word has length 57 [2021-05-21 21:38:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:11,421 INFO L482 AbstractCegarLoop]: Abstraction has 4144 states and 11542 transitions. [2021-05-21 21:38:11,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 11542 transitions. [2021-05-21 21:38:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:11,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:11,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:11,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 21:38:11,636 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2068634654, now seen corresponding path program 18 times [2021-05-21 21:38:11,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:11,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723618110] [2021-05-21 21:38:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:11,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:11,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723618110] [2021-05-21 21:38:11,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723618110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:11,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638639016] [2021-05-21 21:38:11,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:11,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:38:11,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:11,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638639016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:11,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:11,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969776717] [2021-05-21 21:38:11,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:11,974 INFO L87 Difference]: Start difference. First operand 4144 states and 11542 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:12,515 INFO L93 Difference]: Finished difference Result 6621 states and 17407 transitions. [2021-05-21 21:38:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:38:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:12,523 INFO L225 Difference]: With dead ends: 6621 [2021-05-21 21:38:12,523 INFO L226 Difference]: Without dead ends: 6469 [2021-05-21 21:38:12,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 21:38:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-05-21 21:38:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 4249. [2021-05-21 21:38:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 2.803201506591337) internal successors, (11908), 4248 states have internal predecessors, (11908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 11908 transitions. [2021-05-21 21:38:12,584 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 11908 transitions. Word has length 57 [2021-05-21 21:38:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:12,584 INFO L482 AbstractCegarLoop]: Abstraction has 4249 states and 11908 transitions. [2021-05-21 21:38:12,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 11908 transitions. [2021-05-21 21:38:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:12,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:12,589 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:12,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 21:38:12,805 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1964168912, now seen corresponding path program 19 times [2021-05-21 21:38:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:12,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939408218] [2021-05-21 21:38:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:12,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939408218] [2021-05-21 21:38:12,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939408218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219252542] [2021-05-21 21:38:12,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:12,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:13,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219252542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:13,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:13,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:13,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737182357] [2021-05-21 21:38:13,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:13,152 INFO L87 Difference]: Start difference. First operand 4249 states and 11908 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:13,659 INFO L93 Difference]: Finished difference Result 6984 states and 18791 transitions. [2021-05-21 21:38:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:38:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:13,668 INFO L225 Difference]: With dead ends: 6984 [2021-05-21 21:38:13,668 INFO L226 Difference]: Without dead ends: 6832 [2021-05-21 21:38:13,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:38:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-05-21 21:38:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4369. [2021-05-21 21:38:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 2.8120421245421245) internal successors, (12283), 4368 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 12283 transitions. [2021-05-21 21:38:13,733 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 12283 transitions. Word has length 57 [2021-05-21 21:38:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:13,733 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 12283 transitions. [2021-05-21 21:38:13,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 12283 transitions. [2021-05-21 21:38:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:13,738 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:13,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:13,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:13,938 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1161599372, now seen corresponding path program 20 times [2021-05-21 21:38:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:13,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495421738] [2021-05-21 21:38:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:14,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:14,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495421738] [2021-05-21 21:38:14,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495421738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:14,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8968758] [2021-05-21 21:38:14,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:38:14,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:38:14,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:14,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8968758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:14,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:14,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:38:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548648054] [2021-05-21 21:38:14,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:38:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:38:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:38:14,302 INFO L87 Difference]: Start difference. First operand 4369 states and 12283 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:15,230 INFO L93 Difference]: Finished difference Result 9343 states and 25074 transitions. [2021-05-21 21:38:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 21:38:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:15,241 INFO L225 Difference]: With dead ends: 9343 [2021-05-21 21:38:15,241 INFO L226 Difference]: Without dead ends: 8737 [2021-05-21 21:38:15,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:38:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-05-21 21:38:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 4286. [2021-05-21 21:38:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 2.779229871645274) internal successors, (11909), 4285 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 11909 transitions. [2021-05-21 21:38:15,331 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 11909 transitions. Word has length 57 [2021-05-21 21:38:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:15,331 INFO L482 AbstractCegarLoop]: Abstraction has 4286 states and 11909 transitions. [2021-05-21 21:38:15,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 11909 transitions. [2021-05-21 21:38:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:15,336 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:15,336 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:15,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:15,559 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1989449508, now seen corresponding path program 21 times [2021-05-21 21:38:15,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:15,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371551333] [2021-05-21 21:38:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:15,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371551333] [2021-05-21 21:38:15,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371551333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881165325] [2021-05-21 21:38:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:15,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:38:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:15,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:15,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881165325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:15,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:15,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403471613] [2021-05-21 21:38:15,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:15,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:15,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:15,886 INFO L87 Difference]: Start difference. First operand 4286 states and 11909 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:16,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:16,490 INFO L93 Difference]: Finished difference Result 7161 states and 18719 transitions. [2021-05-21 21:38:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 21:38:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:16,499 INFO L225 Difference]: With dead ends: 7161 [2021-05-21 21:38:16,500 INFO L226 Difference]: Without dead ends: 7009 [2021-05-21 21:38:16,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:38:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2021-05-21 21:38:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 4481. [2021-05-21 21:38:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4480 states have (on average 2.7988839285714286) internal successors, (12539), 4480 states have internal predecessors, (12539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 12539 transitions. [2021-05-21 21:38:16,566 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 12539 transitions. Word has length 57 [2021-05-21 21:38:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:16,566 INFO L482 AbstractCegarLoop]: Abstraction has 4481 states and 12539 transitions. [2021-05-21 21:38:16,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 12539 transitions. [2021-05-21 21:38:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:16,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:16,570 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:16,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 21:38:16,771 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash -662949862, now seen corresponding path program 22 times [2021-05-21 21:38:16,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:16,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649022715] [2021-05-21 21:38:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:16,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:16,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649022715] [2021-05-21 21:38:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649022715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:16,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280402365] [2021-05-21 21:38:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:16,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:38:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:38:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280402365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:17,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:38:17,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:38:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21651355] [2021-05-21 21:38:17,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:38:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:38:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:38:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:38:17,073 INFO L87 Difference]: Start difference. First operand 4481 states and 12539 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:38:17,734 INFO L93 Difference]: Finished difference Result 7612 states and 20416 transitions. [2021-05-21 21:38:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:38:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:38:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:38:17,743 INFO L225 Difference]: With dead ends: 7612 [2021-05-21 21:38:17,744 INFO L226 Difference]: Without dead ends: 7460 [2021-05-21 21:38:17,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:38:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-05-21 21:38:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 4601. [2021-05-21 21:38:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.807391304347826) internal successors, (12914), 4600 states have internal predecessors, (12914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 12914 transitions. [2021-05-21 21:38:17,812 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 12914 transitions. Word has length 57 [2021-05-21 21:38:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:38:17,812 INFO L482 AbstractCegarLoop]: Abstraction has 4601 states and 12914 transitions. [2021-05-21 21:38:17,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:38:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 12914 transitions. [2021-05-21 21:38:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:38:17,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:38:17,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:38:18,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:18,018 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:38:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:38:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash -723417374, now seen corresponding path program 23 times [2021-05-21 21:38:18,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:38:18,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055110954] [2021-05-21 21:38:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:38:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:38:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:38:18,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:38:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055110954] [2021-05-21 21:38:18,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055110954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:38:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454202718] [2021-05-21 21:38:18,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:38:18,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:38:18,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:38:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:38:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-21 21:52:01,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:52:01,770 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:52:01,770 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-21 21:52:01,772 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-21 21:52:01,773 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:52:01,773 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:52:01,773 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:52:01,773 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:52:01,773 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:52:01,773 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:52:01,773 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:52:01,773 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-21 21:52:01,774 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 21:52:01,775 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:52:01,775 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-21 21:52:01,775 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:52:01,777 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:52:01,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:52:01 BasicIcfg [2021-05-21 21:52:01,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:52:01,778 INFO L168 Benchmark]: Toolchain (without parser) took 870477.21 ms. Allocated memory was 350.2 MB in the beginning and 1.8 GB in the end (delta: 1.5 GB). Free memory was 311.9 MB in the beginning and 732.8 MB in the end (delta: -421.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 350.2 MB. Free memory is still 330.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.77 ms. Allocated memory is still 350.2 MB. Free memory was 311.6 MB in the beginning and 314.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.22 ms. Allocated memory is still 350.2 MB. Free memory was 314.1 MB in the beginning and 311.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L168 Benchmark]: Boogie Preprocessor took 33.60 ms. Allocated memory is still 350.2 MB. Free memory was 311.0 MB in the beginning and 310.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L168 Benchmark]: RCFGBuilder took 479.66 ms. Allocated memory is still 350.2 MB. Free memory was 310.0 MB in the beginning and 286.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L168 Benchmark]: TraceAbstraction took 869429.79 ms. Allocated memory was 350.2 MB in the beginning and 1.8 GB in the end (delta: 1.5 GB). Free memory was 285.8 MB in the beginning and 732.8 MB in the end (delta: -447.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-05-21 21:52:01,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 350.2 MB. Free memory is still 330.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 475.77 ms. Allocated memory is still 350.2 MB. Free memory was 311.6 MB in the beginning and 314.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 50.22 ms. Allocated memory is still 350.2 MB. Free memory was 314.1 MB in the beginning and 311.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.60 ms. Allocated memory is still 350.2 MB. Free memory was 311.0 MB in the beginning and 310.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 479.66 ms. Allocated memory is still 350.2 MB. Free memory was 310.0 MB in the beginning and 286.9 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 869429.79 ms. Allocated memory was 350.2 MB in the beginning and 1.8 GB in the end (delta: 1.5 GB). Free memory was 285.8 MB in the beginning and 732.8 MB in the end (delta: -447.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 869306.1ms, OverallIterations: 50, TraceHistogramMax: 4, EmptinessCheckTime: 215.1ms, AutomataDifference: 17128.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 126.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4467 SDtfs, 27863 SDslu, 39819 SDs, 0 SdLazy, 6650 SolverSat, 1812 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3725.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3453 GetRequests, 2036 SyntacticMatches, 28 SemanticMatches, 1389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13226 ImplicationChecksByTransitivity, 16282.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4601occurred in iteration=49, InterpolantAutomatonStates: 1181, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2999.8ms AutomataMinimizationTime, 49 MinimizatonAttempts, 80952 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 500.5ms SsaConstructionTime, 1115.9ms SatisfiabilityAnalysisTime, 12569.7ms InterpolantComputationTime, 4847 NumberOfCodeBlocks, 4847 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 4756 ConstructedInterpolants, 0 QuantifiedInterpolants, 35246 SizeOfPredicates, 84 NumberOfNonLiveVariables, 5712 ConjunctsInSsa, 484 ConjunctsInUnsatCore, 91 InterpolantComputations, 7 PerfectInterpolantSequences, 0/930 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown