/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:37:29,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:37:29,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:37:29,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:37:29,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 21:37:29,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 21:37:29,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 21:37:29,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 21:37:29,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 21:37:29,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 21:37:29,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 21:37:29,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 21:37:29,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 21:37:29,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 21:37:29,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 21:37:29,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 21:37:29,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 21:37:29,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:37:29,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:37:29,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:37:29,548 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 21:37:29,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:37:29,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:37:29,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:37:29,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:37:29,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:37:29,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:37:29,589 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:37:29,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:37:29,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:37:29,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:37:29,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:37:29,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:37:29,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:37:29,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:37:29,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:37:29,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:37:29,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:37:29,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:37:29,592 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-21 21:37:29,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:37:29,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:37:29,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:37:29,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:37:29,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 21:37:29,878 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 21:37:29,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-05-21 21:37:29,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464b8750b/c6aa94381ccb411c83830d851c756ec0/FLAG97067637b [2021-05-21 21:37:30,313 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 21:37:30,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-05-21 21:37:30,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464b8750b/c6aa94381ccb411c83830d851c756ec0/FLAG97067637b [2021-05-21 21:37:30,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464b8750b/c6aa94381ccb411c83830d851c756ec0 [2021-05-21 21:37:30,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:37:30,337 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 21:37:30,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 21:37:30,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 21:37:30,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 21:37:30,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6b6ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30, skipping insertion in model container [2021-05-21 21:37:30,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 21:37:30,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 21:37:30,608 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_longer-2.i[30929,30942] [2021-05-21 21:37:30,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:37:30,617 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 21:37:30,660 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_longer-2.i[30929,30942] [2021-05-21 21:37:30,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:37:30,705 INFO L208 MainTranslator]: Completed translation [2021-05-21 21:37:30,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30 WrapperNode [2021-05-21 21:37:30,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 21:37:30,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:37:30,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:37:30,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:37:30,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:37:30,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:37:30,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:37:30,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:37:30,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (1/1) ... [2021-05-21 21:37:30,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:37:30,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:37:30,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:37:30,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:37:30,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (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 21:37:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 21:37:30,826 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 21:37:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 21:37:30,826 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 21:37:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:37:30,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:37:30,829 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 21:37:31,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:37:31,094 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 21:37:31,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:37:31 BoogieIcfgContainer [2021-05-21 21:37:31,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:37:31,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:37:31,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:37:31,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:37:31,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 09:37:30" (1/3) ... [2021-05-21 21:37:31,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff9c970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:37:31, skipping insertion in model container [2021-05-21 21:37:31,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:37:30" (2/3) ... [2021-05-21 21:37:31,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff9c970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:37:31, skipping insertion in model container [2021-05-21 21:37:31,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:37:31" (3/3) ... [2021-05-21 21:37:31,101 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-05-21 21:37:31,105 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:37:31,105 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:37:31,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:37:31,106 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:37:31,129 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,129 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,130 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,131 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,132 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,134 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,134 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,134 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,134 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,135 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,135 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,135 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,135 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,135 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,135 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,136 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,137 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,137 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,137 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,137 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,138 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,138 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,139 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,141 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,141 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,141 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,146 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,146 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,147 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:37:31,148 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 21:37:31,163 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-21 21:37:31,185 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:37:31,186 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:37:31,186 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:37:31,186 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:37:31,186 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:37:31,186 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:37:31,186 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:37:31,186 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:37:31,195 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 21:37:31,265 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 21:37:31,270 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 21:37:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:37:31,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:31,287 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 21:37:31,288 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-05-21 21:37:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589918993] [2021-05-21 21:37:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:31,553 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 21:37:31,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589918993] [2021-05-21 21:37:31,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589918993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:31,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:31,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:37:31,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719711902] [2021-05-21 21:37:31,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:37:31,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:37:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:37:31,568 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 21:37:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:31,685 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-05-21 21:37:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:37:31,687 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 21:37:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:31,701 INFO L225 Difference]: With dead ends: 3996 [2021-05-21 21:37:31,701 INFO L226 Difference]: Without dead ends: 1425 [2021-05-21 21:37:31,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-05-21 21:37:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-05-21 21:37:31,760 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 21:37:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-05-21 21:37:31,764 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-05-21 21:37:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:31,764 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-05-21 21:37:31,764 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 21:37:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-05-21 21:37:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:37:31,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:31,767 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 21:37:31,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:37:31,767 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-05-21 21:37:31,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:31,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780364138] [2021-05-21 21:37:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:31,851 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 21:37:31,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780364138] [2021-05-21 21:37:31,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780364138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:31,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:31,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:37:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659580180] [2021-05-21 21:37:31,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:37:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:37:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:37:31,854 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 21:37:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:31,930 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-05-21 21:37:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:37:31,930 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 21:37:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:31,938 INFO L225 Difference]: With dead ends: 2025 [2021-05-21 21:37:31,938 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 21:37:31,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:37:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 21:37:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-05-21 21:37:31,962 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 21:37:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-05-21 21:37:31,966 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-05-21 21:37:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:31,967 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-05-21 21:37:31,967 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 21:37:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-05-21 21:37:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:37:31,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:31,969 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 21:37:31,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:37:31,969 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:31,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-05-21 21:37:31,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:31,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641580724] [2021-05-21 21:37:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:32,058 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 21:37:32,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:32,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641580724] [2021-05-21 21:37:32,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641580724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:32,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:32,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:37:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671800185] [2021-05-21 21:37:32,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:37:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:37:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:37:32,063 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 21:37:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:32,157 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-05-21 21:37:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:37:32,158 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 21:37:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:32,164 INFO L225 Difference]: With dead ends: 2062 [2021-05-21 21:37:32,164 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 21:37:32,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:37:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 21:37:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-05-21 21:37:32,186 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 21:37:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-05-21 21:37:32,189 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-05-21 21:37:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:32,190 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-05-21 21:37:32,190 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 21:37:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-05-21 21:37:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:37:32,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:32,191 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 21:37:32,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:37:32,191 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-05-21 21:37:32,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:32,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650965111] [2021-05-21 21:37:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:32,262 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 21:37:32,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:32,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650965111] [2021-05-21 21:37:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650965111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:32,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:32,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:37:32,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981385848] [2021-05-21 21:37:32,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:37:32,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:37:32,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:37:32,264 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 21:37:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:32,343 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-05-21 21:37:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:37:32,343 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 21:37:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:32,350 INFO L225 Difference]: With dead ends: 2318 [2021-05-21 21:37:32,350 INFO L226 Difference]: Without dead ends: 1987 [2021-05-21 21:37:32,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:37:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-05-21 21:37:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-05-21 21:37:32,373 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 21:37:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-05-21 21:37:32,377 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-05-21 21:37:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:32,377 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-05-21 21:37:32,377 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 21:37:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-05-21 21:37:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:37:32,379 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:32,379 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 21:37:32,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:37:32,379 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-05-21 21:37:32,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:32,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236086935] [2021-05-21 21:37:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:32,474 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 21:37:32,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:32,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236086935] [2021-05-21 21:37:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236086935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:32,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:32,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:37:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714857550] [2021-05-21 21:37:32,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:37:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:37:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:37:32,477 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 21:37:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:32,542 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-05-21 21:37:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:37:32,542 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 21:37:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:32,549 INFO L225 Difference]: With dead ends: 2203 [2021-05-21 21:37:32,550 INFO L226 Difference]: Without dead ends: 2051 [2021-05-21 21:37:32,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-05-21 21:37:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-05-21 21:37:32,578 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 21:37:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-05-21 21:37:32,583 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-05-21 21:37:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:32,583 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-05-21 21:37:32,583 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 21:37:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-05-21 21:37:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:37:32,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:32,585 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 21:37:32,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:37:32,585 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-05-21 21:37:32,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:32,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74119055] [2021-05-21 21:37:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:32,645 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 21:37:32,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74119055] [2021-05-21 21:37:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74119055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:32,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:32,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:37:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58410203] [2021-05-21 21:37:32,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:37:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:32,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:37:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:37:32,647 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 21:37:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:32,796 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-05-21 21:37:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:37:32,797 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 21:37:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:32,806 INFO L225 Difference]: With dead ends: 2907 [2021-05-21 21:37:32,806 INFO L226 Difference]: Without dead ends: 2461 [2021-05-21 21:37:32,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-05-21 21:37:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-05-21 21:37:32,871 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 21:37:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-05-21 21:37:32,876 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-05-21 21:37:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:32,877 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-05-21 21:37:32,877 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 21:37:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-05-21 21:37:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:37:32,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:32,880 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 21:37:32,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:37:32,880 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-05-21 21:37:32,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:32,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192668091] [2021-05-21 21:37:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:32,986 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 21:37:32,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:32,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192668091] [2021-05-21 21:37:32,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192668091] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:37:32,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:37:32,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:37:32,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101689468] [2021-05-21 21:37:32,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:37:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:37:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:37:32,989 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 21:37:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:33,123 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-05-21 21:37:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:37:33,124 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 21:37:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:33,135 INFO L225 Difference]: With dead ends: 3149 [2021-05-21 21:37:33,135 INFO L226 Difference]: Without dead ends: 2834 [2021-05-21 21:37:33,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-05-21 21:37:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-05-21 21:37:33,179 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 21:37:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-05-21 21:37:33,185 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-05-21 21:37:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:33,186 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-05-21 21:37:33,186 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 21:37:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-05-21 21:37:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:33,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:33,188 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 21:37:33,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 21:37:33,188 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-05-21 21:37:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294532556] [2021-05-21 21:37:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:33,256 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 21:37:33,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:33,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294532556] [2021-05-21 21:37:33,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294532556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:33,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318426391] [2021-05-21 21:37:33,257 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 21:37:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:33,541 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 21:37:33,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318426391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:33,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:33,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663048622] [2021-05-21 21:37:33,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:33,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:33,542 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 21:37:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:33,706 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-05-21 21:37:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:37:33,707 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 21:37:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:33,727 INFO L225 Difference]: With dead ends: 3261 [2021-05-21 21:37:33,727 INFO L226 Difference]: Without dead ends: 2781 [2021-05-21 21:37:33,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:37:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-05-21 21:37:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-05-21 21:37:33,789 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 21:37:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-05-21 21:37:33,794 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-05-21 21:37:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:33,795 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-05-21 21:37:33,795 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 21:37:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-05-21 21:37:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:33,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:33,799 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 21:37:34,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 21:37:34,009 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-05-21 21:37:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73068197] [2021-05-21 21:37:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:34,093 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 21:37:34,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73068197] [2021-05-21 21:37:34,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73068197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184599352] [2021-05-21 21:37:34,093 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 21:37:34,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:34,318 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 21:37:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184599352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:34,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:34,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005572893] [2021-05-21 21:37:34,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:34,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:34,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:34,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:34,320 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 21:37:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:34,464 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-05-21 21:37:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:37:34,464 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 21:37:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:34,469 INFO L225 Difference]: With dead ends: 3013 [2021-05-21 21:37:34,469 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 21:37:34,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:37:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 21:37:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-05-21 21:37:34,501 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 21:37:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-05-21 21:37:34,506 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-05-21 21:37:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:34,506 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-05-21 21:37:34,506 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 21:37:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-05-21 21:37:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:34,508 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:34,508 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 21:37:34,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:34,729 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-05-21 21:37:34,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:34,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922498590] [2021-05-21 21:37:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:34,796 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 21:37:34,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922498590] [2021-05-21 21:37:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922498590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641769786] [2021-05-21 21:37:34,797 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 21:37:34,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:37:34,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:34,998 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 21:37:34,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641769786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:34,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:34,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:34,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812761821] [2021-05-21 21:37:34,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:34,999 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 21:37:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:35,175 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-05-21 21:37:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:35,175 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 21:37:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:35,180 INFO L225 Difference]: With dead ends: 3525 [2021-05-21 21:37:35,180 INFO L226 Difference]: Without dead ends: 3045 [2021-05-21 21:37:35,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-05-21 21:37:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-05-21 21:37:35,213 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 21:37:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-05-21 21:37:35,217 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-05-21 21:37:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:35,217 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-05-21 21:37:35,217 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 21:37:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-05-21 21:37:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:35,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:35,219 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 21:37:35,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 21:37:35,433 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-05-21 21:37:35,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:35,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880708967] [2021-05-21 21:37:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:35,488 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 21:37:35,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:35,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880708967] [2021-05-21 21:37:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880708967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623448752] [2021-05-21 21:37:35,489 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 21:37:35,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:35,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:35,690 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 21:37:35,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623448752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:35,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:35,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:35,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984758822] [2021-05-21 21:37:35,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:35,691 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 21:37:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:36,032 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-05-21 21:37:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:37:36,032 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 21:37:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:36,041 INFO L225 Difference]: With dead ends: 4570 [2021-05-21 21:37:36,041 INFO L226 Difference]: Without dead ends: 3833 [2021-05-21 21:37:36,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-05-21 21:37:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-05-21 21:37:36,078 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 21:37:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-05-21 21:37:36,082 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-05-21 21:37:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:36,082 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-05-21 21:37:36,082 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 21:37:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-05-21 21:37:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:36,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:36,085 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 21:37:36,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:36,301 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-05-21 21:37:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:36,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044516619] [2021-05-21 21:37:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:36,370 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 21:37:36,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044516619] [2021-05-21 21:37:36,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044516619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318533632] [2021-05-21 21:37:36,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:37:36,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:36,577 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 21:37:36,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318533632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:36,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:36,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:36,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782430403] [2021-05-21 21:37:36,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:36,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:36,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:36,578 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 21:37:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:36,834 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-05-21 21:37:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:37:36,834 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 21:37:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:36,841 INFO L225 Difference]: With dead ends: 4350 [2021-05-21 21:37:36,841 INFO L226 Difference]: Without dead ends: 3958 [2021-05-21 21:37:36,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:37:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-05-21 21:37:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-05-21 21:37:36,886 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 21:37:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-05-21 21:37:36,890 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-05-21 21:37:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:36,890 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-05-21 21:37:36,890 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 21:37:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-05-21 21:37:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:37:36,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:36,893 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 21:37:37,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:37,109 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-05-21 21:37:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:37,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823938779] [2021-05-21 21:37:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:37,161 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 21:37:37,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:37,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823938779] [2021-05-21 21:37:37,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823938779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:37,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512773806] [2021-05-21 21:37:37,162 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 21:37:37,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:37:37,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:37,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:37:37,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:37,331 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 21:37:37,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512773806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:37,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:37,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:37:37,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184800344] [2021-05-21 21:37:37,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:37:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:37:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:37:37,332 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 21:37:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:37,881 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-05-21 21:37:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:37:37,882 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 21:37:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:37,888 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 21:37:37,889 INFO L226 Difference]: Without dead ends: 4898 [2021-05-21 21:37:37,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:37:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-05-21 21:37:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-05-21 21:37:37,941 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 21:37:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-05-21 21:37:37,945 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-05-21 21:37:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:37,945 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-05-21 21:37:37,946 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 21:37:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-05-21 21:37:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:37,949 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:37,949 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 21:37:38,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:38,166 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-05-21 21:37:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:38,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770160971] [2021-05-21 21:37:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:38,231 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 21:37:38,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:38,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770160971] [2021-05-21 21:37:38,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770160971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:38,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291473089] [2021-05-21 21:37:38,232 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 21:37:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:38,481 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 21:37:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291473089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:38,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:38,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:38,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365407109] [2021-05-21 21:37:38,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:38,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:38,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:38,485 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:38,676 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-05-21 21:37:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:37:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:38,697 INFO L225 Difference]: With dead ends: 4391 [2021-05-21 21:37:38,697 INFO L226 Difference]: Without dead ends: 3999 [2021-05-21 21:37:38,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:37:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-05-21 21:37:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-05-21 21:37:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 0 states have call successors, (0), 0 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 21:37:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-05-21 21:37:38,740 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-05-21 21:37:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:38,740 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-05-21 21:37:38,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-05-21 21:37:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:38,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:38,743 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 21:37:38,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:37:38,961 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-05-21 21:37:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:38,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525563615] [2021-05-21 21:37:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:39,020 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 21:37:39,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:39,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525563615] [2021-05-21 21:37:39,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525563615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:39,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005536098] [2021-05-21 21:37:39,020 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 21:37:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:39,243 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 21:37:39,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005536098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:39,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:39,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:39,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432821558] [2021-05-21 21:37:39,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:39,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:39,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:39,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:39,246 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:39,446 INFO L93 Difference]: Finished difference Result 4167 states and 10754 transitions. [2021-05-21 21:37:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:37:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:39,452 INFO L225 Difference]: With dead ends: 4167 [2021-05-21 21:37:39,452 INFO L226 Difference]: Without dead ends: 4015 [2021-05-21 21:37:39,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:37:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-05-21 21:37:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 2982. [2021-05-21 21:37:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 0 states have call successors, (0), 0 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 21:37:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-05-21 21:37:39,491 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-05-21 21:37:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:39,491 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-05-21 21:37:39,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-05-21 21:37:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:39,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:39,494 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 21:37:39,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:37:39,712 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-05-21 21:37:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:39,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423463400] [2021-05-21 21:37:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:39,783 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 21:37:39,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423463400] [2021-05-21 21:37:39,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423463400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065810165] [2021-05-21 21:37:39,783 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 21:37:39,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:39,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:39,991 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 21:37:39,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065810165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:39,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:39,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:39,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881708690] [2021-05-21 21:37:39,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:39,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:39,993 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:40,174 INFO L93 Difference]: Finished difference Result 4007 states and 10434 transitions. [2021-05-21 21:37:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:37:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:40,178 INFO L225 Difference]: With dead ends: 4007 [2021-05-21 21:37:40,178 INFO L226 Difference]: Without dead ends: 3855 [2021-05-21 21:37:40,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-05-21 21:37:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 2981. [2021-05-21 21:37:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 0 states have call successors, (0), 0 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 21:37:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-05-21 21:37:40,218 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-05-21 21:37:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:40,218 INFO L482 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-05-21 21:37:40,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-05-21 21:37:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:40,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:40,222 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 21:37:40,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:37:40,437 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-05-21 21:37:40,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:40,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609039613] [2021-05-21 21:37:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:40,492 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 21:37:40,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609039613] [2021-05-21 21:37:40,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609039613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917630485] [2021-05-21 21:37:40,493 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 21:37:40,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:40,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:40,720 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 21:37:40,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917630485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:40,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:40,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242004520] [2021-05-21 21:37:40,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:40,722 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:40,969 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-05-21 21:37:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:37:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:40,976 INFO L225 Difference]: With dead ends: 4796 [2021-05-21 21:37:40,976 INFO L226 Difference]: Without dead ends: 4404 [2021-05-21 21:37:40,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:37:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-05-21 21:37:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-05-21 21:37:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 0 states have call successors, (0), 0 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 21:37:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-05-21 21:37:41,014 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-05-21 21:37:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:41,014 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-05-21 21:37:41,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-05-21 21:37:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:41,017 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:41,017 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 21:37:41,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:41,225 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-05-21 21:37:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579973539] [2021-05-21 21:37:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:41,288 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 21:37:41,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:41,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579973539] [2021-05-21 21:37:41,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579973539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:41,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234744266] [2021-05-21 21:37:41,288 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 21:37:41,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:37:41,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:41,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:41,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:41,467 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 21:37:41,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234744266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:41,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:41,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:41,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293337222] [2021-05-21 21:37:41,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:41,469 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:41,772 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-05-21 21:37:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:37:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:41,777 INFO L225 Difference]: With dead ends: 5543 [2021-05-21 21:37:41,777 INFO L226 Difference]: Without dead ends: 5063 [2021-05-21 21:37:41,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:37:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-05-21 21:37:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-05-21 21:37:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 0 states have call successors, (0), 0 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 21:37:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-05-21 21:37:41,822 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-05-21 21:37:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:41,823 INFO L482 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-05-21 21:37:41,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-05-21 21:37:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:41,825 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:41,826 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 21:37:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 21:37:42,037 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-05-21 21:37:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220077737] [2021-05-21 21:37:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:42,098 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 21:37:42,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:42,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220077737] [2021-05-21 21:37:42,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220077737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:42,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866997837] [2021-05-21 21:37:42,099 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 21:37:42,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:42,279 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 21:37:42,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866997837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:42,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:42,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:42,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726786261] [2021-05-21 21:37:42,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:42,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:42,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:42,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:42,284 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 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 21:37:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:42,776 INFO L93 Difference]: Finished difference Result 6220 states and 16674 transitions. [2021-05-21 21:37:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:37:42,777 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 21:37:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:42,782 INFO L225 Difference]: With dead ends: 6220 [2021-05-21 21:37:42,782 INFO L226 Difference]: Without dead ends: 5544 [2021-05-21 21:37:42,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:37:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-05-21 21:37:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 3235. [2021-05-21 21:37:42,822 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 21:37:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-05-21 21:37:42,826 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-05-21 21:37:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:42,826 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-05-21 21:37:42,827 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 21:37:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-05-21 21:37:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:42,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:42,829 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 21:37:43,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:43,049 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-05-21 21:37:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:43,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406253342] [2021-05-21 21:37:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:43,106 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 21:37:43,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:43,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406253342] [2021-05-21 21:37:43,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406253342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:43,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694325408] [2021-05-21 21:37:43,107 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 21:37:43,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:37:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:43,299 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 21:37:43,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694325408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:43,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:43,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442295913] [2021-05-21 21:37:43,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:43,301 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:43,619 INFO L93 Difference]: Finished difference Result 5134 states and 13421 transitions. [2021-05-21 21:37:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:37:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:43,624 INFO L225 Difference]: With dead ends: 5134 [2021-05-21 21:37:43,624 INFO L226 Difference]: Without dead ends: 4982 [2021-05-21 21:37:43,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:37:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-05-21 21:37:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3275. [2021-05-21 21:37:43,660 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 21:37:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-05-21 21:37:43,665 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-05-21 21:37:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:43,665 INFO L482 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-05-21 21:37:43,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-05-21 21:37:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:43,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:43,668 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 21:37:43,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 21:37:43,881 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-05-21 21:37:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158235016] [2021-05-21 21:37:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:43,948 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 21:37:43,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:43,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158235016] [2021-05-21 21:37:43,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158235016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:43,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416866810] [2021-05-21 21:37:43,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:37:44,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:44,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:44,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:44,147 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 21:37:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416866810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:37:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428852271] [2021-05-21 21:37:44,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:37:44,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:37:44,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:37:44,150 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:44,439 INFO L93 Difference]: Finished difference Result 5358 states and 14344 transitions. [2021-05-21 21:37:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:37:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 21:37:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:44,445 INFO L225 Difference]: With dead ends: 5358 [2021-05-21 21:37:44,445 INFO L226 Difference]: Without dead ends: 5206 [2021-05-21 21:37:44,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:37:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-05-21 21:37:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 3363. [2021-05-21 21:37:44,483 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 21:37:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-05-21 21:37:44,487 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-05-21 21:37:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:44,488 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-05-21 21:37:44,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-05-21 21:37:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 21:37:44,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:44,491 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 21:37:44,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:44,707 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-05-21 21:37:44,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:44,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879810601] [2021-05-21 21:37:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:44,761 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 21:37:44,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:44,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879810601] [2021-05-21 21:37:44,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879810601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:44,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027147552] [2021-05-21 21:37:44,762 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 21:37:44,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:37:44,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:37:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:44,925 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 21:37:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027147552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:44,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:44,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:37:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668932825] [2021-05-21 21:37:44,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:37:44,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:37:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:37:44,926 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 21:37:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:45,461 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-05-21 21:37:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:37:45,461 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 21:37:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:45,468 INFO L225 Difference]: With dead ends: 6683 [2021-05-21 21:37:45,468 INFO L226 Difference]: Without dead ends: 6253 [2021-05-21 21:37:45,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:37:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-05-21 21:37:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-05-21 21:37:45,515 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 21:37:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-05-21 21:37:45,519 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-05-21 21:37:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:45,520 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-05-21 21:37:45,520 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 21:37:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-05-21 21:37:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:45,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:45,523 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 21:37:45,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:37:45,741 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-05-21 21:37:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:45,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649716817] [2021-05-21 21:37:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:45,809 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 21:37:45,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:45,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649716817] [2021-05-21 21:37:45,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649716817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:45,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965035656] [2021-05-21 21:37:45,809 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 21:37:45,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:37:45,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:46,004 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 21:37:46,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965035656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:46,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:46,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:46,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949836770] [2021-05-21 21:37:46,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:46,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:46,005 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 21:37:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:46,137 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-05-21 21:37:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:37:46,137 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 21:37:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:46,142 INFO L225 Difference]: With dead ends: 4779 [2021-05-21 21:37:46,142 INFO L226 Difference]: Without dead ends: 4627 [2021-05-21 21:37:46,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:37:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-05-21 21:37:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-05-21 21:37:46,177 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 21:37:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 21:37:46,181 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 21:37:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:46,182 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 21:37:46,182 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 21:37:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 21:37:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:46,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:46,185 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 21:37:46,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 21:37:46,401 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-05-21 21:37:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:46,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497511223] [2021-05-21 21:37:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:46,478 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 21:37:46,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:46,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497511223] [2021-05-21 21:37:46,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497511223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:46,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55978402] [2021-05-21 21:37:46,479 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 21:37:46,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:37:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:46,677 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 21:37:46,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55978402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:46,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:46,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:46,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287459790] [2021-05-21 21:37:46,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:46,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:46,679 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 21:37:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:46,895 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-05-21 21:37:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:37:46,895 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 21:37:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:46,900 INFO L225 Difference]: With dead ends: 4955 [2021-05-21 21:37:46,900 INFO L226 Difference]: Without dead ends: 4803 [2021-05-21 21:37:46,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:37:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-05-21 21:37:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-05-21 21:37:46,934 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 21:37:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 21:37:46,938 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 21:37:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:46,938 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 21:37:46,939 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 21:37:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 21:37:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:46,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:46,942 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 21:37:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:37:47,149 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-05-21 21:37:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349391471] [2021-05-21 21:37:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:47,217 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 21:37:47,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349391471] [2021-05-21 21:37:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349391471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078633153] [2021-05-21 21:37:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:37:47,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:37:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:47,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:47,430 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 21:37:47,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078633153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:47,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:47,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:47,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367933047] [2021-05-21 21:37:47,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:47,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:47,432 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 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 21:37:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:47,718 INFO L93 Difference]: Finished difference Result 5339 states and 13949 transitions. [2021-05-21 21:37:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:37:47,718 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 21:37:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:47,723 INFO L225 Difference]: With dead ends: 5339 [2021-05-21 21:37:47,724 INFO L226 Difference]: Without dead ends: 4947 [2021-05-21 21:37:47,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:37:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-05-21 21:37:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3582. [2021-05-21 21:37:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 2.7402960067020383) internal successors, (9813), 3581 states have internal predecessors, (9813), 0 states have call successors, (0), 0 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 21:37:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 9813 transitions. [2021-05-21 21:37:47,770 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 9813 transitions. Word has length 57 [2021-05-21 21:37:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:47,770 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 9813 transitions. [2021-05-21 21:37:47,771 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 21:37:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 9813 transitions. [2021-05-21 21:37:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:47,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:47,775 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 21:37:47,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:37:47,989 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-05-21 21:37:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:47,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140107675] [2021-05-21 21:37:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:48,068 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 21:37:48,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140107675] [2021-05-21 21:37:48,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140107675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197630423] [2021-05-21 21:37:48,068 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 21:37:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:48,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:48,321 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 21:37:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197630423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:48,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:48,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:48,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675627497] [2021-05-21 21:37:48,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:48,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:48,323 INFO L87 Difference]: Start difference. First operand 3582 states and 9813 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 21:37:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:48,540 INFO L93 Difference]: Finished difference Result 4949 states and 13043 transitions. [2021-05-21 21:37:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:48,541 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 21:37:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:48,545 INFO L225 Difference]: With dead ends: 4949 [2021-05-21 21:37:48,545 INFO L226 Difference]: Without dead ends: 4797 [2021-05-21 21:37:48,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:37:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-05-21 21:37:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3547. [2021-05-21 21:37:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.745628877608573) internal successors, (9736), 3546 states have internal predecessors, (9736), 0 states have call successors, (0), 0 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 21:37:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9736 transitions. [2021-05-21 21:37:48,585 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9736 transitions. Word has length 57 [2021-05-21 21:37:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:48,586 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9736 transitions. [2021-05-21 21:37:48,586 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 21:37:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9736 transitions. [2021-05-21 21:37:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:48,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:48,589 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 21:37:48,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:48,805 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-05-21 21:37:48,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:48,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571561879] [2021-05-21 21:37:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:48,887 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 21:37:48,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:48,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571561879] [2021-05-21 21:37:48,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571561879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:48,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450881080] [2021-05-21 21:37:48,887 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 21:37:48,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:48,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:49,105 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 21:37:49,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450881080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:49,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:49,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:49,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047753597] [2021-05-21 21:37:49,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:49,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:49,106 INFO L87 Difference]: Start difference. First operand 3547 states and 9736 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 21:37:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:49,350 INFO L93 Difference]: Finished difference Result 5131 states and 13405 transitions. [2021-05-21 21:37:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:37:49,351 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 21:37:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:49,355 INFO L225 Difference]: With dead ends: 5131 [2021-05-21 21:37:49,355 INFO L226 Difference]: Without dead ends: 4979 [2021-05-21 21:37:49,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-05-21 21:37:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3652. [2021-05-21 21:37:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 2.7299370035606683) internal successors, (9967), 3651 states have internal predecessors, (9967), 0 states have call successors, (0), 0 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 21:37:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 9967 transitions. [2021-05-21 21:37:49,393 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 9967 transitions. Word has length 57 [2021-05-21 21:37:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:49,393 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 9967 transitions. [2021-05-21 21:37:49,393 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 21:37:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 9967 transitions. [2021-05-21 21:37:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:49,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:49,397 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 21:37:49,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 21:37:49,604 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-05-21 21:37:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:49,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398732133] [2021-05-21 21:37:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:49,673 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 21:37:49,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:49,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398732133] [2021-05-21 21:37:49,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398732133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:49,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572324095] [2021-05-21 21:37:49,674 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 21:37:49,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:37:49,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:49,917 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 21:37:49,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572324095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:49,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:49,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:49,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383797683] [2021-05-21 21:37:49,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:49,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:49,918 INFO L87 Difference]: Start difference. First operand 3652 states and 9967 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 21:37:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:50,249 INFO L93 Difference]: Finished difference Result 5235 states and 13613 transitions. [2021-05-21 21:37:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:37:50,249 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 21:37:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:50,254 INFO L225 Difference]: With dead ends: 5235 [2021-05-21 21:37:50,254 INFO L226 Difference]: Without dead ends: 5083 [2021-05-21 21:37:50,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:37:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-05-21 21:37:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3636. [2021-05-21 21:37:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.730123796423659) internal successors, (9924), 3635 states have internal predecessors, (9924), 0 states have call successors, (0), 0 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 21:37:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 9924 transitions. [2021-05-21 21:37:50,291 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 9924 transitions. Word has length 57 [2021-05-21 21:37:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:50,291 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 9924 transitions. [2021-05-21 21:37:50,291 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 21:37:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 9924 transitions. [2021-05-21 21:37:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:50,294 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:50,294 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 21:37:50,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 21:37:50,495 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-05-21 21:37:50,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:50,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492892944] [2021-05-21 21:37:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:50,556 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 21:37:50,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:50,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492892944] [2021-05-21 21:37:50,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492892944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:50,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362092092] [2021-05-21 21:37:50,557 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 21:37:50,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:50,781 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 21:37:50,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362092092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:50,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:50,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:50,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952451901] [2021-05-21 21:37:50,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:50,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:50,782 INFO L87 Difference]: Start difference. First operand 3636 states and 9924 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 21:37:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:51,078 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-05-21 21:37:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:37:51,079 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 21:37:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:51,083 INFO L225 Difference]: With dead ends: 5219 [2021-05-21 21:37:51,083 INFO L226 Difference]: Without dead ends: 5067 [2021-05-21 21:37:51,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:37:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-05-21 21:37:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3581. [2021-05-21 21:37:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 2.7391061452513967) internal successors, (9806), 3580 states have internal predecessors, (9806), 0 states have call successors, (0), 0 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 21:37:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 9806 transitions. [2021-05-21 21:37:51,121 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 9806 transitions. Word has length 57 [2021-05-21 21:37:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:51,122 INFO L482 AbstractCegarLoop]: Abstraction has 3581 states and 9806 transitions. [2021-05-21 21:37:51,122 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 21:37:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 9806 transitions. [2021-05-21 21:37:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:51,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:51,125 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 21:37:51,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:51,325 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-05-21 21:37:51,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:51,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687697020] [2021-05-21 21:37:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:51,387 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 21:37:51,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:51,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687697020] [2021-05-21 21:37:51,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687697020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:51,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736476014] [2021-05-21 21:37:51,387 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 21:37:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:51,596 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 21:37:51,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736476014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:51,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:51,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589475831] [2021-05-21 21:37:51,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:51,598 INFO L87 Difference]: Start difference. First operand 3581 states and 9806 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 21:37:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:51,760 INFO L93 Difference]: Finished difference Result 5043 states and 13229 transitions. [2021-05-21 21:37:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:37:51,760 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 21:37:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:51,764 INFO L225 Difference]: With dead ends: 5043 [2021-05-21 21:37:51,765 INFO L226 Difference]: Without dead ends: 4891 [2021-05-21 21:37:51,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:37:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-05-21 21:37:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-05-21 21:37:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 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 21:37:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-05-21 21:37:51,802 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-05-21 21:37:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:51,802 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-05-21 21:37:51,803 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 21:37:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-05-21 21:37:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:51,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:51,806 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 21:37:52,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 21:37:52,006 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-05-21 21:37:52,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:52,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509416122] [2021-05-21 21:37:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:52,068 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 21:37:52,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509416122] [2021-05-21 21:37:52,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509416122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720275719] [2021-05-21 21:37:52,069 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 21:37:52,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:52,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:52,264 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 21:37:52,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720275719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:52,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:52,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:52,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816765593] [2021-05-21 21:37:52,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:52,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:52,265 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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 21:37:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:52,476 INFO L93 Difference]: Finished difference Result 5339 states and 13821 transitions. [2021-05-21 21:37:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:52,477 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 21:37:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:52,481 INFO L225 Difference]: With dead ends: 5339 [2021-05-21 21:37:52,481 INFO L226 Difference]: Without dead ends: 5187 [2021-05-21 21:37:52,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:37:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-05-21 21:37:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3606. [2021-05-21 21:37:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.735367545076283) internal successors, (9861), 3605 states have internal predecessors, (9861), 0 states have call successors, (0), 0 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 21:37:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9861 transitions. [2021-05-21 21:37:52,518 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9861 transitions. Word has length 57 [2021-05-21 21:37:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:52,518 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9861 transitions. [2021-05-21 21:37:52,519 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 21:37:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9861 transitions. [2021-05-21 21:37:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:52,522 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:52,522 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 21:37:52,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:52,733 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-05-21 21:37:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:52,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419919797] [2021-05-21 21:37:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:52,798 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 21:37:52,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:52,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419919797] [2021-05-21 21:37:52,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419919797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:52,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258682645] [2021-05-21 21:37:52,798 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 21:37:52,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:37:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:53,001 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 21:37:53,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258682645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:53,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:53,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:53,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163013932] [2021-05-21 21:37:53,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:53,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:53,003 INFO L87 Difference]: Start difference. First operand 3606 states and 9861 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 21:37:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:53,321 INFO L93 Difference]: Finished difference Result 5859 states and 14989 transitions. [2021-05-21 21:37:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:37:53,321 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 21:37:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:53,326 INFO L225 Difference]: With dead ends: 5859 [2021-05-21 21:37:53,326 INFO L226 Difference]: Without dead ends: 5467 [2021-05-21 21:37:53,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:37:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-05-21 21:37:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3631. [2021-05-21 21:37:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.73168044077135) internal successors, (9916), 3630 states have internal predecessors, (9916), 0 states have call successors, (0), 0 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 21:37:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9916 transitions. [2021-05-21 21:37:53,366 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9916 transitions. Word has length 57 [2021-05-21 21:37:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:53,366 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9916 transitions. [2021-05-21 21:37:53,366 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 21:37:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9916 transitions. [2021-05-21 21:37:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:53,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:53,369 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 21:37:53,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 21:37:53,569 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-05-21 21:37:53,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:53,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505010687] [2021-05-21 21:37:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:53,638 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 21:37:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505010687] [2021-05-21 21:37:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505010687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304111318] [2021-05-21 21:37:53,638 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 21:37:53,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:37:53,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:53,858 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 21:37:53,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304111318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:53,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:53,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:53,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189071266] [2021-05-21 21:37:53,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:53,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:53,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:53,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:53,860 INFO L87 Difference]: Start difference. First operand 3631 states and 9916 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 21:37:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:54,095 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-05-21 21:37:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:37:54,095 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 21:37:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:54,100 INFO L225 Difference]: With dead ends: 5219 [2021-05-21 21:37:54,100 INFO L226 Difference]: Without dead ends: 5067 [2021-05-21 21:37:54,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:37:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-05-21 21:37:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3556. [2021-05-21 21:37:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 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 21:37:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-05-21 21:37:54,137 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-05-21 21:37:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:54,137 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-05-21 21:37:54,138 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 21:37:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-05-21 21:37:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:54,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:54,140 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 21:37:54,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 21:37:54,356 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:54,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-05-21 21:37:54,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:54,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032208917] [2021-05-21 21:37:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:54,426 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 21:37:54,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032208917] [2021-05-21 21:37:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032208917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256432396] [2021-05-21 21:37:54,426 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 21:37:54,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:37:54,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:54,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:54,602 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 21:37:54,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256432396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:54,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:54,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:54,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900753847] [2021-05-21 21:37:54,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:54,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:54,603 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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 21:37:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:54,773 INFO L93 Difference]: Finished difference Result 5128 states and 13414 transitions. [2021-05-21 21:37:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:37:54,773 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 21:37:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:54,778 INFO L225 Difference]: With dead ends: 5128 [2021-05-21 21:37:54,778 INFO L226 Difference]: Without dead ends: 4976 [2021-05-21 21:37:54,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:37:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-05-21 21:37:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3531. [2021-05-21 21:37:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 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 21:37:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-05-21 21:37:54,814 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-05-21 21:37:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:54,814 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-05-21 21:37:54,814 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 21:37:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-05-21 21:37:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:54,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:54,817 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 21:37:55,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 21:37:55,017 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-05-21 21:37:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:55,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761817287] [2021-05-21 21:37:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:55,082 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 21:37:55,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:55,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761817287] [2021-05-21 21:37:55,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761817287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:55,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780618578] [2021-05-21 21:37:55,082 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 21:37:55,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:55,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:55,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:55,284 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 21:37:55,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780618578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:55,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:55,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:55,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029973] [2021-05-21 21:37:55,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:55,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:55,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:55,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:55,285 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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 21:37:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:55,504 INFO L93 Difference]: Finished difference Result 5384 states and 13926 transitions. [2021-05-21 21:37:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:37:55,504 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 21:37:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:55,509 INFO L225 Difference]: With dead ends: 5384 [2021-05-21 21:37:55,509 INFO L226 Difference]: Without dead ends: 5232 [2021-05-21 21:37:55,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:37:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-05-21 21:37:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 3556. [2021-05-21 21:37:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 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 21:37:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-05-21 21:37:55,545 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-05-21 21:37:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:55,545 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-05-21 21:37:55,545 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 21:37:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-05-21 21:37:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:55,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:55,548 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 21:37:55,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:55,753 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-05-21 21:37:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531634037] [2021-05-21 21:37:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:55,808 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 21:37:55,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531634037] [2021-05-21 21:37:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531634037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609589418] [2021-05-21 21:37:55,808 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 21:37:55,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:37:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:55,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:55,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:56,003 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 21:37:56,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609589418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:56,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:56,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 21:37:56,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709731576] [2021-05-21 21:37:56,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:37:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:37:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:37:56,004 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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 21:37:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:56,184 INFO L93 Difference]: Finished difference Result 5113 states and 13389 transitions. [2021-05-21 21:37:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:37:56,185 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 21:37:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:56,189 INFO L225 Difference]: With dead ends: 5113 [2021-05-21 21:37:56,189 INFO L226 Difference]: Without dead ends: 4961 [2021-05-21 21:37:56,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:37:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-05-21 21:37:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3531. [2021-05-21 21:37:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 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 21:37:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-05-21 21:37:56,227 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-05-21 21:37:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:56,227 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-05-21 21:37:56,227 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 21:37:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-05-21 21:37:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:56,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:56,247 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 21:37:56,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 21:37:56,453 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-05-21 21:37:56,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:56,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357473390] [2021-05-21 21:37:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:56,515 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 21:37:56,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:56,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357473390] [2021-05-21 21:37:56,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357473390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:56,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796401167] [2021-05-21 21:37:56,516 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 21:37:56,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:37:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:37:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:57,038 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 21:37:57,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796401167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:57,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:57,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:57,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35547195] [2021-05-21 21:37:57,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:57,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:57,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:57,040 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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 21:37:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:57,547 INFO L93 Difference]: Finished difference Result 7762 states and 20463 transitions. [2021-05-21 21:37:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:37:57,547 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 21:37:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:57,554 INFO L225 Difference]: With dead ends: 7762 [2021-05-21 21:37:57,554 INFO L226 Difference]: Without dead ends: 7052 [2021-05-21 21:37:57,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:37:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2021-05-21 21:37:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 3809. [2021-05-21 21:37:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 2.7547268907563027) internal successors, (10490), 3808 states have internal predecessors, (10490), 0 states have call successors, (0), 0 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 21:37:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 10490 transitions. [2021-05-21 21:37:57,603 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 10490 transitions. Word has length 57 [2021-05-21 21:37:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:57,603 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 10490 transitions. [2021-05-21 21:37:57,603 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 21:37:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 10490 transitions. [2021-05-21 21:37:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:57,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:57,606 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 21:37:57,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:57,808 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash 613988712, now seen corresponding path program 13 times [2021-05-21 21:37:57,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:57,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807220375] [2021-05-21 21:37:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:57,870 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 21:37:57,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807220375] [2021-05-21 21:37:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807220375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090169262] [2021-05-21 21:37:57,871 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 21:37:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:57,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:58,113 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 21:37:58,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090169262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:58,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:58,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 21:37:58,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166648786] [2021-05-21 21:37:58,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:37:58,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:58,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:37:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:37:58,115 INFO L87 Difference]: Start difference. First operand 3809 states and 10490 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 21:37:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:58,373 INFO L93 Difference]: Finished difference Result 5498 states and 14449 transitions. [2021-05-21 21:37:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:37:58,374 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 21:37:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:58,379 INFO L225 Difference]: With dead ends: 5498 [2021-05-21 21:37:58,379 INFO L226 Difference]: Without dead ends: 5346 [2021-05-21 21:37:58,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:37:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-05-21 21:37:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 3884. [2021-05-21 21:37:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3883 states have (on average 2.7671903167653875) internal successors, (10745), 3883 states have internal predecessors, (10745), 0 states have call successors, (0), 0 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 21:37:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 10745 transitions. [2021-05-21 21:37:58,437 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 10745 transitions. Word has length 57 [2021-05-21 21:37:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:58,437 INFO L482 AbstractCegarLoop]: Abstraction has 3884 states and 10745 transitions. [2021-05-21 21:37:58,437 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 21:37:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 10745 transitions. [2021-05-21 21:37:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:37:58,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:58,440 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 21:37:58,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:58,646 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:37:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash -48566186, now seen corresponding path program 14 times [2021-05-21 21:37:58,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:58,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991438379] [2021-05-21 21:37:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:58,711 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 21:37:58,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991438379] [2021-05-21 21:37:58,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991438379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536401832] [2021-05-21 21:37:58,711 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 21:37:58,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:58,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:58,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:37:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-21 21:52:10,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-21 21:52:10,378 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:52:10,378 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-21 21:52:10,380 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-21 21:52:10,380 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:52:10,380 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:52:10,380 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:52:10,380 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:52:10,380 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:52:10,380 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:52:10,380 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:52:10,380 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-21 21:52:10,381 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 21:52:10,382 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:52:10,382 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-21 21:52:10,382 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:52:10,383 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:52:10,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:52:10 BasicIcfg [2021-05-21 21:52:10,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:52:10,383 INFO L168 Benchmark]: Toolchain (without parser) took 880048.08 ms. Allocated memory was 350.2 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 312.6 MB in the beginning and 1.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 71.9 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 350.2 MB. Free memory was 330.6 MB in the beginning and 330.6 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.09 ms. Allocated memory is still 350.2 MB. Free memory was 312.4 MB in the beginning and 314.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.48 ms. Allocated memory is still 350.2 MB. Free memory was 314.0 MB in the beginning and 311.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L168 Benchmark]: Boogie Preprocessor took 28.89 ms. Allocated memory is still 350.2 MB. Free memory was 311.9 MB in the beginning and 310.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L168 Benchmark]: RCFGBuilder took 319.78 ms. Allocated memory is still 350.2 MB. Free memory was 310.9 MB in the beginning and 286.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L168 Benchmark]: TraceAbstraction took 879286.35 ms. Allocated memory was 350.2 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 286.8 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 48.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:52:10,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 350.2 MB. Free memory was 330.6 MB in the beginning and 330.6 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 363.09 ms. Allocated memory is still 350.2 MB. Free memory was 312.4 MB in the beginning and 314.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 39.48 ms. Allocated memory is still 350.2 MB. Free memory was 314.0 MB in the beginning and 311.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.89 ms. Allocated memory is still 350.2 MB. Free memory was 311.9 MB in the beginning and 310.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 319.78 ms. Allocated memory is still 350.2 MB. Free memory was 310.9 MB in the beginning and 286.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 879286.35 ms. Allocated memory was 350.2 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 286.8 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 48.1 MB. 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: 879194.5ms, OverallIterations: 39, TraceHistogramMax: 4, EmptinessCheckTime: 138.7ms, AutomataDifference: 9406.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3553 SDtfs, 19238 SDslu, 28079 SDs, 0 SdLazy, 4777 SolverSat, 1269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2295.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2466 GetRequests, 1481 SyntacticMatches, 8 SemanticMatches, 977 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 8852.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3884occurred in iteration=38, InterpolantAutomatonStates: 821, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1582.2ms AutomataMinimizationTime, 38 MinimizatonAttempts, 51245 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 309.5ms SsaConstructionTime, 711.0ms SatisfiabilityAnalysisTime, 7424.7ms InterpolantComputationTime, 3593 NumberOfCodeBlocks, 3593 NumberOfCodeBlocksAsserted, 112 NumberOfCheckSat, 3524 ConstructedInterpolants, 0 QuantifiedInterpolants, 26046 SizeOfPredicates, 62 NumberOfNonLiveVariables, 4172 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 69 InterpolantComputations, 7 PerfectInterpolantSequences, 0/648 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: 1.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.1ms, 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