/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.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-04 21:12:23,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-04 21:12:23,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-04 21:12:24,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-04 21:12:24,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-04 21:12:24,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-04 21:12:24,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-04 21:12:24,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-04 21:12:24,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-04 21:12:24,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-04 21:12:24,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-04 21:12:24,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-04 21:12:24,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-04 21:12:24,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-04 21:12:24,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-04 21:12:24,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-04 21:12:24,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-04 21:12:24,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-04 21:12:24,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-04 21:12:24,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-04 21:12:24,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-04 21:12:24,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-04 21:12:24,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-04 21:12:24,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-04 21:12:24,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-04 21:12:24,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-04 21:12:24,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-04 21:12:24,115 INFO L138 SettingsManager]: * Use SBE=true [2021-06-04 21:12:24,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-04 21:12:24,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-04 21:12:24,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-04 21:12:24,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-04 21:12:24,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-04 21:12:24,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-04 21:12:24,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-04 21:12:24,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-04 21:12:24,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-04 21:12:24,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-04 21:12:24,118 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-04 21:12:24,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-04 21:12:24,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-04 21:12:24,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-04 21:12:24,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-04 21:12:24,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-04 21:12:24,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:12:24,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-04 21:12:24,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-04 21:12:24,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-04 21:12:24,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-04 21:12:24,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-04 21:12:24,119 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-04 21:12:24,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-04 21:12:24,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-04 21:12:24,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-04 21:12:24,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-04 21:12:24,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-04 21:12:24,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-04 21:12:24,735 INFO L275 PluginConnector]: CDTParser initialized [2021-06-04 21:12:24,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-06-04 21:12:24,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da72c5826/a8359ab1cd894f53af885eeeb86f78eb/FLAG50dabd726 [2021-06-04 21:12:25,332 INFO L306 CDTParser]: Found 1 translation units. [2021-06-04 21:12:25,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-06-04 21:12:25,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da72c5826/a8359ab1cd894f53af885eeeb86f78eb/FLAG50dabd726 [2021-06-04 21:12:25,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da72c5826/a8359ab1cd894f53af885eeeb86f78eb [2021-06-04 21:12:25,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-04 21:12:25,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-04 21:12:25,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-04 21:12:25,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-04 21:12:25,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-04 21:12:25,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:12:25" (1/1) ... [2021-06-04 21:12:25,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d0479d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:25, skipping insertion in model container [2021-06-04 21:12:25,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:12:25" (1/1) ... [2021-06-04 21:12:25,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-04 21:12:25,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-04 21:12:26,183 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-1.i[30927,30940] [2021-06-04 21:12:26,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:12:26,194 INFO L203 MainTranslator]: Completed pre-run [2021-06-04 21:12:26,230 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-1.i[30927,30940] [2021-06-04 21:12:26,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:12:26,285 INFO L208 MainTranslator]: Completed translation [2021-06-04 21:12:26,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26 WrapperNode [2021-06-04 21:12:26,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-04 21:12:26,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-04 21:12:26,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-04 21:12:26,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-04 21:12:26,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-04 21:12:26,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-04 21:12:26,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-04 21:12:26,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-04 21:12:26,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... [2021-06-04 21:12:26,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-04 21:12:26,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-04 21:12:26,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-04 21:12:26,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-04 21:12:26,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:12:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-04 21:12:26,420 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-04 21:12:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-04 21:12:26,421 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-04 21:12:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-04 21:12:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-04 21:12:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-04 21:12:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-04 21:12:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-04 21:12:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-04 21:12:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-04 21:12:26,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-04 21:12:26,423 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-04 21:12:26,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-04 21:12:26,709 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-04 21:12:26,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:12:26 BoogieIcfgContainer [2021-06-04 21:12:26,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-04 21:12:26,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-04 21:12:26,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-04 21:12:26,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-04 21:12:26,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 09:12:25" (1/3) ... [2021-06-04 21:12:26,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f395f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:12:26, skipping insertion in model container [2021-06-04 21:12:26,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:12:26" (2/3) ... [2021-06-04 21:12:26,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f395f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:12:26, skipping insertion in model container [2021-06-04 21:12:26,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:12:26" (3/3) ... [2021-06-04 21:12:26,718 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-06-04 21:12:26,723 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-04 21:12:26,723 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-04 21:12:26,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-04 21:12:26,724 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-04 21:12:26,770 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,770 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,770 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,770 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,771 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,771 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,771 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,771 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,771 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,771 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,772 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,772 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,772 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,772 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,773 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,773 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,773 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,773 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,773 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,773 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,774 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,774 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,774 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,774 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,774 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,775 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,775 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,775 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,775 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,775 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,776 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,776 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,776 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,776 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,776 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,776 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,778 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,778 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,778 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,778 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,778 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,779 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,779 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,779 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,779 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,779 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,779 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,780 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,780 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,780 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,780 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,780 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,780 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,781 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,782 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,783 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,783 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,783 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,783 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,805 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,806 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,806 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,806 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,806 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,806 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:12:26,811 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-04 21:12:26,831 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-04 21:12:26,862 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-04 21:12:26,862 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-04 21:12:26,863 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-04 21:12:26,863 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-04 21:12:26,864 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-04 21:12:26,864 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-04 21:12:26,864 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-04 21:12:26,864 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-04 21:12:26,877 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-04 21:12:26,976 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) [2021-06-04 21:12:26,985 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) [2021-06-04 21:12:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-04 21:12:27,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:27,005 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] [2021-06-04 21:12:27,006 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-04 21:12:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:27,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101287364] [2021-06-04 21:12:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:27,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:27,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101287364] [2021-06-04 21:12:27,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101287364] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:27,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:27,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:12:27,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597262429] [2021-06-04 21:12:27,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:12:27,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:12:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:12:27,403 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) [2021-06-04 21:12:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:27,566 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-04 21:12:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-04 21:12:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-04 21:12:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:27,601 INFO L225 Difference]: With dead ends: 3996 [2021-06-04 21:12:27,601 INFO L226 Difference]: Without dead ends: 1425 [2021-06-04 21:12:27,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:12:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-04 21:12:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-04 21:12:27,723 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) [2021-06-04 21:12:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-04 21:12:27,729 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-04 21:12:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:27,730 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-04 21:12:27,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-04 21:12:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-04 21:12:27,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:27,737 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] [2021-06-04 21:12:27,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-04 21:12:27,738 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-06-04 21:12:27,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:27,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802819471] [2021-06-04 21:12:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:27,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:27,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802819471] [2021-06-04 21:12:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802819471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:27,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:27,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:12:27,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640570406] [2021-06-04 21:12:27,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:12:27,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:27,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:12:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:12:27,918 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) [2021-06-04 21:12:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,058 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-04 21:12:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:12:28,059 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 [2021-06-04 21:12:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,071 INFO L225 Difference]: With dead ends: 2025 [2021-06-04 21:12:28,071 INFO L226 Difference]: Without dead ends: 1758 [2021-06-04 21:12:28,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:12:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-04 21:12:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-04 21:12:28,114 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) [2021-06-04 21:12:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-04 21:12:28,119 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-04 21:12:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,120 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-04 21:12:28,121 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) [2021-06-04 21:12:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-04 21:12:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-04 21:12:28,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,123 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] [2021-06-04 21:12:28,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-04 21:12:28,123 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-04 21:12:28,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172003077] [2021-06-04 21:12:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172003077] [2021-06-04 21:12:28,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172003077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:28,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:28,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:12:28,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39598964] [2021-06-04 21:12:28,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:12:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:12:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:12:28,203 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) [2021-06-04 21:12:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,310 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-04 21:12:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:12:28,310 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 [2021-06-04 21:12:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,318 INFO L225 Difference]: With dead ends: 2062 [2021-06-04 21:12:28,318 INFO L226 Difference]: Without dead ends: 1758 [2021-06-04 21:12:28,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:12:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-04 21:12:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-04 21:12:28,357 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) [2021-06-04 21:12:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-04 21:12:28,363 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-04 21:12:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,364 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-04 21:12:28,364 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) [2021-06-04 21:12:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-04 21:12:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-04 21:12:28,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,368 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] [2021-06-04 21:12:28,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-04 21:12:28,369 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-04 21:12:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073247788] [2021-06-04 21:12:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073247788] [2021-06-04 21:12:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073247788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:28,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:28,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:12:28,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642814917] [2021-06-04 21:12:28,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:12:28,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:28,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:12:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:12:28,494 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) [2021-06-04 21:12:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,594 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-04 21:12:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:12:28,594 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 [2021-06-04 21:12:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,608 INFO L225 Difference]: With dead ends: 2318 [2021-06-04 21:12:28,608 INFO L226 Difference]: Without dead ends: 1987 [2021-06-04 21:12:28,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:12:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-04 21:12:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-04 21:12:28,644 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) [2021-06-04 21:12:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-04 21:12:28,650 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-04 21:12:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,652 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-04 21:12:28,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-04 21:12:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-04 21:12:28,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,654 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] [2021-06-04 21:12:28,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-04 21:12:28,655 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-06-04 21:12:28,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407618892] [2021-06-04 21:12:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:28,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:28,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407618892] [2021-06-04 21:12:28,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407618892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:28,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:28,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:12:28,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959728650] [2021-06-04 21:12:28,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:12:28,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:12:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:12:28,777 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) [2021-06-04 21:12:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:28,847 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-06-04 21:12:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-04 21:12:28,847 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 [2021-06-04 21:12:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:28,857 INFO L225 Difference]: With dead ends: 2203 [2021-06-04 21:12:28,857 INFO L226 Difference]: Without dead ends: 2051 [2021-06-04 21:12:28,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:12:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-04 21:12:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-06-04 21:12:28,898 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) [2021-06-04 21:12:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-06-04 21:12:28,904 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-06-04 21:12:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:28,904 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-06-04 21:12:28,904 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) [2021-06-04 21:12:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-06-04 21:12:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-04 21:12:28,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:28,907 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] [2021-06-04 21:12:28,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-04 21:12:28,907 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-06-04 21:12:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:28,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859344298] [2021-06-04 21:12:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:29,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:29,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859344298] [2021-06-04 21:12:29,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859344298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:29,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:29,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:12:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869397448] [2021-06-04 21:12:29,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:12:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:12:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:12:29,024 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) [2021-06-04 21:12:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:29,199 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-06-04 21:12:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:12:29,200 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 [2021-06-04 21:12:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:29,218 INFO L225 Difference]: With dead ends: 2907 [2021-06-04 21:12:29,218 INFO L226 Difference]: Without dead ends: 2461 [2021-06-04 21:12:29,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-06-04 21:12:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-06-04 21:12:29,278 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) [2021-06-04 21:12:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-06-04 21:12:29,283 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-06-04 21:12:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:29,283 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-06-04 21:12:29,284 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) [2021-06-04 21:12:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-06-04 21:12:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-04 21:12:29,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:29,286 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] [2021-06-04 21:12:29,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-04 21:12:29,286 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-06-04 21:12:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:29,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287954207] [2021-06-04 21:12:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:29,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:29,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287954207] [2021-06-04 21:12:29,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287954207] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:12:29,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:12:29,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:12:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020622198] [2021-06-04 21:12:29,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:12:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:12:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:12:29,360 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) [2021-06-04 21:12:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:29,500 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-06-04 21:12:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:12:29,501 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 [2021-06-04 21:12:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:29,512 INFO L225 Difference]: With dead ends: 3149 [2021-06-04 21:12:29,513 INFO L226 Difference]: Without dead ends: 2834 [2021-06-04 21:12:29,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-04 21:12:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-06-04 21:12:29,561 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) [2021-06-04 21:12:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-06-04 21:12:29,567 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-06-04 21:12:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:29,567 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-06-04 21:12:29,567 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) [2021-06-04 21:12:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-06-04 21:12:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:29,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:29,570 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] [2021-06-04 21:12:29,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-04 21:12:29,570 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-06-04 21:12:29,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:29,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650617606] [2021-06-04 21:12:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:29,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:29,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650617606] [2021-06-04 21:12:29,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650617606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:29,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118835845] [2021-06-04 21:12:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:30,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118835845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:30,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:30,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:30,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940000399] [2021-06-04 21:12:30,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:30,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:30,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:30,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:30,009 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) [2021-06-04 21:12:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:30,250 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-06-04 21:12:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:12:30,250 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 [2021-06-04 21:12:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:30,277 INFO L225 Difference]: With dead ends: 3261 [2021-06-04 21:12:30,277 INFO L226 Difference]: Without dead ends: 2781 [2021-06-04 21:12:30,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:12:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-04 21:12:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-06-04 21:12:30,352 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) [2021-06-04 21:12:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-06-04 21:12:30,359 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-06-04 21:12:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:30,360 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-06-04 21:12:30,361 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) [2021-06-04 21:12:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-06-04 21:12:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:30,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:30,366 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] [2021-06-04 21:12:30,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-04 21:12:30,580 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-06-04 21:12:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:30,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832114910] [2021-06-04 21:12:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:30,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:30,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832114910] [2021-06-04 21:12:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832114910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:30,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891692760] [2021-06-04 21:12:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:30,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:31,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891692760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:31,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:31,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:31,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707400213] [2021-06-04 21:12:31,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:31,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:31,002 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) [2021-06-04 21:12:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:31,176 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-06-04 21:12:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:12:31,177 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 [2021-06-04 21:12:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:31,184 INFO L225 Difference]: With dead ends: 3013 [2021-06-04 21:12:31,184 INFO L226 Difference]: Without dead ends: 2861 [2021-06-04 21:12:31,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:12:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-04 21:12:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-06-04 21:12:31,232 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) [2021-06-04 21:12:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-06-04 21:12:31,239 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-06-04 21:12:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:31,239 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-06-04 21:12:31,239 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) [2021-06-04 21:12:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-06-04 21:12:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:31,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:31,243 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] [2021-06-04 21:12:31,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:31,467 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:31,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-06-04 21:12:31,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:31,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798426939] [2021-06-04 21:12:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:31,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:31,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798426939] [2021-06-04 21:12:31,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798426939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:31,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840151794] [2021-06-04 21:12:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:31,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-04 21:12:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:31,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840151794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:31,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:31,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:31,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753916340] [2021-06-04 21:12:31,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:31,787 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) [2021-06-04 21:12:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:31,993 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-06-04 21:12:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:31,994 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 [2021-06-04 21:12:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:32,000 INFO L225 Difference]: With dead ends: 3525 [2021-06-04 21:12:32,001 INFO L226 Difference]: Without dead ends: 3045 [2021-06-04 21:12:32,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:12:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-06-04 21:12:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-06-04 21:12:32,047 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) [2021-06-04 21:12:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-06-04 21:12:32,053 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-06-04 21:12:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:32,054 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-06-04 21:12:32,054 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) [2021-06-04 21:12:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-06-04 21:12:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:32,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:32,057 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] [2021-06-04 21:12:32,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-04 21:12:32,278 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-06-04 21:12:32,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:32,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491701906] [2021-06-04 21:12:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:32,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:32,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491701906] [2021-06-04 21:12:32,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491701906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:32,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821020506] [2021-06-04 21:12:32,351 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 [2021-06-04 21:12:32,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:32,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821020506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:32,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:32,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:32,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376562461] [2021-06-04 21:12:32,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:32,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:32,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:32,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:32,592 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) [2021-06-04 21:12:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:32,968 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-06-04 21:12:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:12:32,969 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 [2021-06-04 21:12:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:32,977 INFO L225 Difference]: With dead ends: 4570 [2021-06-04 21:12:32,977 INFO L226 Difference]: Without dead ends: 3833 [2021-06-04 21:12:32,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:12:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-06-04 21:12:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-06-04 21:12:33,029 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) [2021-06-04 21:12:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-06-04 21:12:33,035 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-06-04 21:12:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:33,036 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-06-04 21:12:33,036 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) [2021-06-04 21:12:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-06-04 21:12:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:33,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:33,040 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] [2021-06-04 21:12:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:33,249 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-06-04 21:12:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:33,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306855699] [2021-06-04 21:12:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:33,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306855699] [2021-06-04 21:12:33,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306855699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658283728] [2021-06-04 21:12:33,407 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 [2021-06-04 21:12:33,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:33,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658283728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:33,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:33,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:33,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051051955] [2021-06-04 21:12:33,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:33,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:33,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:33,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:33,618 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) [2021-06-04 21:12:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:33,878 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-06-04 21:12:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:12:33,879 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 [2021-06-04 21:12:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:33,887 INFO L225 Difference]: With dead ends: 4350 [2021-06-04 21:12:33,887 INFO L226 Difference]: Without dead ends: 3958 [2021-06-04 21:12:33,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-06-04 21:12:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-06-04 21:12:33,944 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) [2021-06-04 21:12:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-06-04 21:12:33,951 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-06-04 21:12:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:33,951 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-06-04 21:12:33,952 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) [2021-06-04 21:12:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-06-04 21:12:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-04 21:12:33,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:33,955 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] [2021-06-04 21:12:34,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:34,179 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-06-04 21:12:34,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:34,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748410816] [2021-06-04 21:12:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:34,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:34,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748410816] [2021-06-04 21:12:34,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748410816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:34,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813832947] [2021-06-04 21:12:34,249 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 [2021-06-04 21:12:34,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-04 21:12:34,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:12:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:34,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813832947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:34,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:34,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-04 21:12:34,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49980790] [2021-06-04 21:12:34,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:12:34,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:12:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:12:34,443 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) [2021-06-04 21:12:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:35,051 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-06-04 21:12:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:12:35,052 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 [2021-06-04 21:12:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:35,062 INFO L225 Difference]: With dead ends: 5771 [2021-06-04 21:12:35,063 INFO L226 Difference]: Without dead ends: 4898 [2021-06-04 21:12:35,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:12:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-04 21:12:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-06-04 21:12:35,136 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) [2021-06-04 21:12:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-06-04 21:12:35,145 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-06-04 21:12:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:35,145 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-06-04 21:12:35,145 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) [2021-06-04 21:12:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-06-04 21:12:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:35,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:35,150 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] [2021-06-04 21:12:35,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:35,374 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:35,374 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-06-04 21:12:35,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:35,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998413661] [2021-06-04 21:12:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:35,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998413661] [2021-06-04 21:12:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998413661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005275137] [2021-06-04 21:12:35,451 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 [2021-06-04 21:12:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:35,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:35,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005275137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:35,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:35,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071837279] [2021-06-04 21:12:35,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:35,657 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) [2021-06-04 21:12:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:35,913 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-06-04 21:12:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:12:35,914 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 [2021-06-04 21:12:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:35,922 INFO L225 Difference]: With dead ends: 4391 [2021-06-04 21:12:35,922 INFO L226 Difference]: Without dead ends: 3999 [2021-06-04 21:12:35,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-04 21:12:35,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-06-04 21:12:35,978 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) [2021-06-04 21:12:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-06-04 21:12:35,986 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-06-04 21:12:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:35,986 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-06-04 21:12:35,987 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) [2021-06-04 21:12:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-06-04 21:12:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:35,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:35,992 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] [2021-06-04 21:12:36,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-04 21:12:36,212 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-06-04 21:12:36,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:36,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213555286] [2021-06-04 21:12:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:36,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213555286] [2021-06-04 21:12:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213555286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065718666] [2021-06-04 21:12:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:36,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065718666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:36,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:36,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:36,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576876826] [2021-06-04 21:12:36,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:36,492 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 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) [2021-06-04 21:12:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:36,697 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-06-04 21:12:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:12:36,698 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 [2021-06-04 21:12:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:36,706 INFO L225 Difference]: With dead ends: 4087 [2021-06-04 21:12:36,707 INFO L226 Difference]: Without dead ends: 3935 [2021-06-04 21:12:36,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:12:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-04 21:12:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2982. [2021-06-04 21:12:36,759 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) [2021-06-04 21:12:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-06-04 21:12:36,767 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-06-04 21:12:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:36,768 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-06-04 21:12:36,768 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) [2021-06-04 21:12:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-06-04 21:12:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:36,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:36,774 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] [2021-06-04 21:12:36,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-04 21:12:36,989 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-06-04 21:12:36,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:36,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965102654] [2021-06-04 21:12:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:37,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:37,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965102654] [2021-06-04 21:12:37,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965102654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:37,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563245772] [2021-06-04 21:12:37,093 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:37,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563245772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:37,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:37,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891097620] [2021-06-04 21:12:37,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:37,333 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 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) [2021-06-04 21:12:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:37,496 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-06-04 21:12:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:12:37,496 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 [2021-06-04 21:12:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:37,503 INFO L225 Difference]: With dead ends: 3927 [2021-06-04 21:12:37,503 INFO L226 Difference]: Without dead ends: 3775 [2021-06-04 21:12:37,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:12:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-04 21:12:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2981. [2021-06-04 21:12:37,552 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) [2021-06-04 21:12:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-06-04 21:12:37,559 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-06-04 21:12:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:37,559 INFO L482 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-06-04 21:12:37,559 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) [2021-06-04 21:12:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-06-04 21:12:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:37,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:37,565 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] [2021-06-04 21:12:37,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-04 21:12:37,784 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-06-04 21:12:37,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:37,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747683517] [2021-06-04 21:12:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:37,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747683517] [2021-06-04 21:12:37,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747683517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:37,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560591972] [2021-06-04 21:12:37,857 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 [2021-06-04 21:12:37,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:37,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:38,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560591972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:38,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:38,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:38,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049158557] [2021-06-04 21:12:38,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:38,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:38,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:38,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:38,080 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) [2021-06-04 21:12:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:38,377 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-06-04 21:12:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:12:38,377 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 [2021-06-04 21:12:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:38,385 INFO L225 Difference]: With dead ends: 4796 [2021-06-04 21:12:38,385 INFO L226 Difference]: Without dead ends: 4404 [2021-06-04 21:12:38,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:12:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-04 21:12:38,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-06-04 21:12:38,446 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) [2021-06-04 21:12:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-06-04 21:12:38,453 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-06-04 21:12:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:38,453 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-06-04 21:12:38,453 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) [2021-06-04 21:12:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-06-04 21:12:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:38,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:38,457 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] [2021-06-04 21:12:38,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-04 21:12:38,673 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:38,674 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-06-04 21:12:38,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:38,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245604288] [2021-06-04 21:12:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:38,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:38,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245604288] [2021-06-04 21:12:38,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245604288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:38,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745789130] [2021-06-04 21:12:38,740 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 [2021-06-04 21:12:38,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:12:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:38,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745789130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:38,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:38,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:38,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114366601] [2021-06-04 21:12:38,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:38,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:38,971 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) [2021-06-04 21:12:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:39,341 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-06-04 21:12:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:12:39,341 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 [2021-06-04 21:12:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:39,349 INFO L225 Difference]: With dead ends: 5543 [2021-06-04 21:12:39,349 INFO L226 Difference]: Without dead ends: 5063 [2021-06-04 21:12:39,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:12:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-06-04 21:12:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-06-04 21:12:39,418 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) [2021-06-04 21:12:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-06-04 21:12:39,426 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-06-04 21:12:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:39,426 INFO L482 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-06-04 21:12:39,426 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) [2021-06-04 21:12:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-06-04 21:12:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:39,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:39,431 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] [2021-06-04 21:12:39,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-04 21:12:39,652 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-06-04 21:12:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444413516] [2021-06-04 21:12:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:39,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:39,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444413516] [2021-06-04 21:12:39,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444413516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:39,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750781808] [2021-06-04 21:12:39,744 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 [2021-06-04 21:12:39,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:39,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:39,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:39,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750781808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:39,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:39,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-04 21:12:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381823720] [2021-06-04 21:12:39,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:12:39,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:12:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:12:39,988 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 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) [2021-06-04 21:12:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:40,689 INFO L93 Difference]: Finished difference Result 6631 states and 17538 transitions. [2021-06-04 21:12:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:12:40,689 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 [2021-06-04 21:12:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:40,702 INFO L225 Difference]: With dead ends: 6631 [2021-06-04 21:12:40,703 INFO L226 Difference]: Without dead ends: 5691 [2021-06-04 21:12:40,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:12:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5691 states. [2021-06-04 21:12:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5691 to 3302. [2021-06-04 21:12:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.7197818842774915) internal successors, (8978), 3301 states have internal predecessors, (8978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 8978 transitions. [2021-06-04 21:12:40,780 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 8978 transitions. Word has length 52 [2021-06-04 21:12:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:40,780 INFO L482 AbstractCegarLoop]: Abstraction has 3302 states and 8978 transitions. [2021-06-04 21:12:40,781 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) [2021-06-04 21:12:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 8978 transitions. [2021-06-04 21:12:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:40,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:40,785 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] [2021-06-04 21:12:41,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:41,001 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-06-04 21:12:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481605582] [2021-06-04 21:12:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:41,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:41,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481605582] [2021-06-04 21:12:41,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481605582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:41,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433936234] [2021-06-04 21:12:41,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:41,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:12:41,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433936234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:41,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:41,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229961213] [2021-06-04 21:12:41,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:41,324 INFO L87 Difference]: Start difference. First operand 3302 states and 8978 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) [2021-06-04 21:12:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:41,640 INFO L93 Difference]: Finished difference Result 5165 states and 13423 transitions. [2021-06-04 21:12:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:12:41,640 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 [2021-06-04 21:12:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:41,647 INFO L225 Difference]: With dead ends: 5165 [2021-06-04 21:12:41,647 INFO L226 Difference]: Without dead ends: 5013 [2021-06-04 21:12:41,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:12:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-06-04 21:12:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 3472. [2021-06-04 21:12:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 2.746182656295016) internal successors, (9532), 3471 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 9532 transitions. [2021-06-04 21:12:41,717 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 9532 transitions. Word has length 52 [2021-06-04 21:12:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:41,717 INFO L482 AbstractCegarLoop]: Abstraction has 3472 states and 9532 transitions. [2021-06-04 21:12:41,718 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) [2021-06-04 21:12:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 9532 transitions. [2021-06-04 21:12:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:41,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:41,722 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] [2021-06-04 21:12:41,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-04 21:12:41,937 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-06-04 21:12:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529737523] [2021-06-04 21:12:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:42,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:42,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529737523] [2021-06-04 21:12:42,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529737523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:42,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789851243] [2021-06-04 21:12:42,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:42,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:42,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789851243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:42,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:42,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:42,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761852746] [2021-06-04 21:12:42,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:42,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:42,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:42,245 INFO L87 Difference]: Start difference. First operand 3472 states and 9532 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) [2021-06-04 21:12:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:42,621 INFO L93 Difference]: Finished difference Result 5629 states and 14961 transitions. [2021-06-04 21:12:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:12:42,621 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 [2021-06-04 21:12:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:42,629 INFO L225 Difference]: With dead ends: 5629 [2021-06-04 21:12:42,629 INFO L226 Difference]: Without dead ends: 5477 [2021-06-04 21:12:42,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:12:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2021-06-04 21:12:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 3560. [2021-06-04 21:12:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 2.766226468109019) internal successors, (9845), 3559 states have internal predecessors, (9845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 9845 transitions. [2021-06-04 21:12:42,701 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 9845 transitions. Word has length 52 [2021-06-04 21:12:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:42,701 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 9845 transitions. [2021-06-04 21:12:42,701 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) [2021-06-04 21:12:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 9845 transitions. [2021-06-04 21:12:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-04 21:12:42,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:42,707 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] [2021-06-04 21:12:42,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:42,929 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-06-04 21:12:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:42,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691557451] [2021-06-04 21:12:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:43,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691557451] [2021-06-04 21:12:43,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691557451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529193052] [2021-06-04 21:12:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:43,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:12:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:12:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:43,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529193052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:43,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:43,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-04 21:12:43,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913932729] [2021-06-04 21:12:43,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:12:43,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:12:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:12:43,212 INFO L87 Difference]: Start difference. First operand 3560 states and 9845 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) [2021-06-04 21:12:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:43,822 INFO L93 Difference]: Finished difference Result 6909 states and 18691 transitions. [2021-06-04 21:12:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:12:43,823 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 [2021-06-04 21:12:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:43,829 INFO L225 Difference]: With dead ends: 6909 [2021-06-04 21:12:43,829 INFO L226 Difference]: Without dead ends: 6479 [2021-06-04 21:12:43,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:12:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2021-06-04 21:12:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 3764. [2021-06-04 21:12:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-06-04 21:12:43,921 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 52 [2021-06-04 21:12:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:43,921 INFO L482 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-06-04 21:12:43,921 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) [2021-06-04 21:12:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-06-04 21:12:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:43,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:43,927 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] [2021-06-04 21:12:44,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-04 21:12:44,141 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:44,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-06-04 21:12:44,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:44,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896916338] [2021-06-04 21:12:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:44,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:44,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896916338] [2021-06-04 21:12:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896916338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850267574] [2021-06-04 21:12:44,244 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 [2021-06-04 21:12:44,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:12:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:44,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:44,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850267574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:44,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:44,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425926270] [2021-06-04 21:12:44,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:44,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:44,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:44,506 INFO L87 Difference]: Start difference. First operand 3764 states and 10412 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) [2021-06-04 21:12:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:44,673 INFO L93 Difference]: Finished difference Result 5044 states and 13383 transitions. [2021-06-04 21:12:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-04 21:12:44,674 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 [2021-06-04 21:12:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:44,679 INFO L225 Difference]: With dead ends: 5044 [2021-06-04 21:12:44,679 INFO L226 Difference]: Without dead ends: 4892 [2021-06-04 21:12:44,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:12:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-06-04 21:12:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 3839. [2021-06-04 21:12:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 2.755862428348098) internal successors, (10577), 3838 states have internal predecessors, (10577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 10577 transitions. [2021-06-04 21:12:44,750 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 10577 transitions. Word has length 57 [2021-06-04 21:12:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:44,750 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 10577 transitions. [2021-06-04 21:12:44,750 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) [2021-06-04 21:12:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 10577 transitions. [2021-06-04 21:12:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:44,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:44,756 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] [2021-06-04 21:12:44,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-04 21:12:44,975 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-06-04 21:12:44,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:44,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141538964] [2021-06-04 21:12:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:45,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:45,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141538964] [2021-06-04 21:12:45,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141538964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:45,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87473750] [2021-06-04 21:12:45,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:45,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:12:45,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:45,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87473750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:45,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:45,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:45,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896338824] [2021-06-04 21:12:45,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:45,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:45,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:45,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:45,326 INFO L87 Difference]: Start difference. First operand 3839 states and 10577 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) [2021-06-04 21:12:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:45,557 INFO L93 Difference]: Finished difference Result 5180 states and 13655 transitions. [2021-06-04 21:12:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:12:45,558 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 [2021-06-04 21:12:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:45,563 INFO L225 Difference]: With dead ends: 5180 [2021-06-04 21:12:45,563 INFO L226 Difference]: Without dead ends: 5028 [2021-06-04 21:12:45,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:12:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-06-04 21:12:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 3839. [2021-06-04 21:12:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 2.755862428348098) internal successors, (10577), 3838 states have internal predecessors, (10577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 10577 transitions. [2021-06-04 21:12:45,638 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 10577 transitions. Word has length 57 [2021-06-04 21:12:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:45,638 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 10577 transitions. [2021-06-04 21:12:45,639 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) [2021-06-04 21:12:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 10577 transitions. [2021-06-04 21:12:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:45,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:45,644 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] [2021-06-04 21:12:45,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-04 21:12:45,854 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-06-04 21:12:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:45,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856708793] [2021-06-04 21:12:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:45,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856708793] [2021-06-04 21:12:45,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856708793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768764939] [2021-06-04 21:12:45,929 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 [2021-06-04 21:12:46,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-04 21:12:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768764939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:46,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:46,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:46,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888299710] [2021-06-04 21:12:46,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:46,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:46,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:46,198 INFO L87 Difference]: Start difference. First operand 3839 states and 10577 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) [2021-06-04 21:12:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:46,488 INFO L93 Difference]: Finished difference Result 5324 states and 13943 transitions. [2021-06-04 21:12:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:12:46,489 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 [2021-06-04 21:12:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:46,497 INFO L225 Difference]: With dead ends: 5324 [2021-06-04 21:12:46,498 INFO L226 Difference]: Without dead ends: 5172 [2021-06-04 21:12:46,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:12:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-06-04 21:12:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 3904. [2021-06-04 21:12:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.74583653599795) internal successors, (10717), 3903 states have internal predecessors, (10717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 10717 transitions. [2021-06-04 21:12:46,576 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 10717 transitions. Word has length 57 [2021-06-04 21:12:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:46,576 INFO L482 AbstractCegarLoop]: Abstraction has 3904 states and 10717 transitions. [2021-06-04 21:12:46,576 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) [2021-06-04 21:12:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 10717 transitions. [2021-06-04 21:12:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:46,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:46,582 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] [2021-06-04 21:12:46,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-04 21:12:46,797 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-06-04 21:12:46,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:46,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025676011] [2021-06-04 21:12:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:46,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:46,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025676011] [2021-06-04 21:12:46,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025676011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:46,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883074909] [2021-06-04 21:12:46,886 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 [2021-06-04 21:12:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:46,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883074909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79599941] [2021-06-04 21:12:47,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:47,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:47,195 INFO L87 Difference]: Start difference. First operand 3904 states and 10717 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) [2021-06-04 21:12:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:47,434 INFO L93 Difference]: Finished difference Result 5195 states and 13680 transitions. [2021-06-04 21:12:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:47,434 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 [2021-06-04 21:12:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:47,440 INFO L225 Difference]: With dead ends: 5195 [2021-06-04 21:12:47,440 INFO L226 Difference]: Without dead ends: 5043 [2021-06-04 21:12:47,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-06-04 21:12:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 3869. [2021-06-04 21:12:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.750775594622544) internal successors, (10640), 3868 states have internal predecessors, (10640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 10640 transitions. [2021-06-04 21:12:47,511 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 10640 transitions. Word has length 57 [2021-06-04 21:12:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:47,511 INFO L482 AbstractCegarLoop]: Abstraction has 3869 states and 10640 transitions. [2021-06-04 21:12:47,511 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) [2021-06-04 21:12:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 10640 transitions. [2021-06-04 21:12:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:47,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:47,516 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] [2021-06-04 21:12:47,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:47,721 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-06-04 21:12:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:47,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644581204] [2021-06-04 21:12:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:47,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:47,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644581204] [2021-06-04 21:12:47,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644581204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:47,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905529938] [2021-06-04 21:12:47,808 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 [2021-06-04 21:12:47,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:47,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:48,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905529938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:48,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:48,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:48,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029280257] [2021-06-04 21:12:48,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:48,074 INFO L87 Difference]: Start difference. First operand 3869 states and 10640 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) [2021-06-04 21:12:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:48,329 INFO L93 Difference]: Finished difference Result 5377 states and 14042 transitions. [2021-06-04 21:12:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:12:48,330 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 [2021-06-04 21:12:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:48,336 INFO L225 Difference]: With dead ends: 5377 [2021-06-04 21:12:48,336 INFO L226 Difference]: Without dead ends: 5225 [2021-06-04 21:12:48,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:12:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2021-06-04 21:12:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 3974. [2021-06-04 21:12:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.7362194815001257) internal successors, (10871), 3973 states have internal predecessors, (10871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 10871 transitions. [2021-06-04 21:12:48,403 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 10871 transitions. Word has length 57 [2021-06-04 21:12:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:48,403 INFO L482 AbstractCegarLoop]: Abstraction has 3974 states and 10871 transitions. [2021-06-04 21:12:48,403 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) [2021-06-04 21:12:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 10871 transitions. [2021-06-04 21:12:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:48,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:48,410 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] [2021-06-04 21:12:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-04 21:12:48,625 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-06-04 21:12:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812837180] [2021-06-04 21:12:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:48,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812837180] [2021-06-04 21:12:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812837180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052607415] [2021-06-04 21:12:48,724 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 [2021-06-04 21:12:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:12:48,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:48,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:48,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052607415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:48,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:48,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:48,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771208278] [2021-06-04 21:12:48,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:48,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:48,963 INFO L87 Difference]: Start difference. First operand 3974 states and 10871 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) [2021-06-04 21:12:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:49,285 INFO L93 Difference]: Finished difference Result 5481 states and 14250 transitions. [2021-06-04 21:12:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:12:49,285 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 [2021-06-04 21:12:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:49,290 INFO L225 Difference]: With dead ends: 5481 [2021-06-04 21:12:49,290 INFO L226 Difference]: Without dead ends: 5329 [2021-06-04 21:12:49,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:12:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-04 21:12:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 3943. [2021-06-04 21:12:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 2.73921867072552) internal successors, (10798), 3942 states have internal predecessors, (10798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 10798 transitions. [2021-06-04 21:12:49,360 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 10798 transitions. Word has length 57 [2021-06-04 21:12:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:49,360 INFO L482 AbstractCegarLoop]: Abstraction has 3943 states and 10798 transitions. [2021-06-04 21:12:49,361 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) [2021-06-04 21:12:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 10798 transitions. [2021-06-04 21:12:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:49,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:49,366 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] [2021-06-04 21:12:49,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-04 21:12:49,577 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-06-04 21:12:49,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:49,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221577291] [2021-06-04 21:12:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:49,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221577291] [2021-06-04 21:12:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221577291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174116974] [2021-06-04 21:12:49,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:49,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:49,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:49,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174116974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:49,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:49,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:49,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452711779] [2021-06-04 21:12:49,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:49,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:49,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:49,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:49,904 INFO L87 Difference]: Start difference. First operand 3943 states and 10798 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) [2021-06-04 21:12:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:50,257 INFO L93 Difference]: Finished difference Result 5465 states and 14218 transitions. [2021-06-04 21:12:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:12:50,257 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 [2021-06-04 21:12:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:50,262 INFO L225 Difference]: With dead ends: 5465 [2021-06-04 21:12:50,262 INFO L226 Difference]: Without dead ends: 5313 [2021-06-04 21:12:50,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:12:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-04 21:12:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3903. [2021-06-04 21:12:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-06-04 21:12:50,320 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-06-04 21:12:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:50,320 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-06-04 21:12:50,320 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) [2021-06-04 21:12:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-06-04 21:12:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:50,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:50,326 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] [2021-06-04 21:12:50,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:50,526 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-06-04 21:12:50,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:50,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622137547] [2021-06-04 21:12:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:50,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622137547] [2021-06-04 21:12:50,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622137547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901657412] [2021-06-04 21:12:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:50,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901657412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:50,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:50,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:50,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630289014] [2021-06-04 21:12:50,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:50,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:50,841 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 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) [2021-06-04 21:12:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:51,033 INFO L93 Difference]: Finished difference Result 5284 states and 13871 transitions. [2021-06-04 21:12:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:12:51,033 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 [2021-06-04 21:12:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:51,039 INFO L225 Difference]: With dead ends: 5284 [2021-06-04 21:12:51,039 INFO L226 Difference]: Without dead ends: 5132 [2021-06-04 21:12:51,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:12:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-04 21:12:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 3953. [2021-06-04 21:12:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-06-04 21:12:51,096 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-06-04 21:12:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:51,096 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-06-04 21:12:51,096 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) [2021-06-04 21:12:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-06-04 21:12:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:51,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:51,102 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] [2021-06-04 21:12:51,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-04 21:12:51,315 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-06-04 21:12:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:51,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040172011] [2021-06-04 21:12:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:51,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:51,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040172011] [2021-06-04 21:12:51,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040172011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:51,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294181841] [2021-06-04 21:12:51,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:51,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:12:51,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:51,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294181841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:51,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:51,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:51,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995368200] [2021-06-04 21:12:51,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:51,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:51,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:51,602 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 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) [2021-06-04 21:12:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:51,832 INFO L93 Difference]: Finished difference Result 5525 states and 14358 transitions. [2021-06-04 21:12:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:51,832 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 [2021-06-04 21:12:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:51,866 INFO L225 Difference]: With dead ends: 5525 [2021-06-04 21:12:51,866 INFO L226 Difference]: Without dead ends: 5373 [2021-06-04 21:12:51,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:12:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2021-06-04 21:12:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 3953. [2021-06-04 21:12:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-06-04 21:12:51,909 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-06-04 21:12:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:51,910 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-06-04 21:12:51,910 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) [2021-06-04 21:12:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-06-04 21:12:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:51,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:51,914 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] [2021-06-04 21:12:52,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:52,117 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-06-04 21:12:52,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:52,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084684550] [2021-06-04 21:12:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:52,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084684550] [2021-06-04 21:12:52,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084684550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749258967] [2021-06-04 21:12:52,194 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 [2021-06-04 21:12:52,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:12:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:52,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749258967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:52,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:52,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:52,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761267295] [2021-06-04 21:12:52,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:52,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:52,419 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 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) [2021-06-04 21:12:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:52,702 INFO L93 Difference]: Finished difference Result 5660 states and 14623 transitions. [2021-06-04 21:12:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:12:52,703 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 [2021-06-04 21:12:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:52,708 INFO L225 Difference]: With dead ends: 5660 [2021-06-04 21:12:52,708 INFO L226 Difference]: Without dead ends: 5508 [2021-06-04 21:12:52,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:12:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-06-04 21:12:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3953. [2021-06-04 21:12:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-06-04 21:12:52,757 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-06-04 21:12:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:52,757 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-06-04 21:12:52,757 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) [2021-06-04 21:12:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-06-04 21:12:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:52,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:52,761 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] [2021-06-04 21:12:52,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-04 21:12:52,961 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-06-04 21:12:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:52,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548901493] [2021-06-04 21:12:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:53,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:53,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548901493] [2021-06-04 21:12:53,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548901493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:53,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445040963] [2021-06-04 21:12:53,034 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 [2021-06-04 21:12:53,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:12:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:53,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:53,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445040963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:53,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:53,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-04 21:12:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109142509] [2021-06-04 21:12:53,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:12:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:12:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:12:53,244 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 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) [2021-06-04 21:12:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:53,500 INFO L93 Difference]: Finished difference Result 5465 states and 14218 transitions. [2021-06-04 21:12:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:12:53,500 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 [2021-06-04 21:12:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:53,525 INFO L225 Difference]: With dead ends: 5465 [2021-06-04 21:12:53,525 INFO L226 Difference]: Without dead ends: 5313 [2021-06-04 21:12:53,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:12:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-04 21:12:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3878. [2021-06-04 21:12:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7482589631158114) internal successors, (10655), 3877 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10655 transitions. [2021-06-04 21:12:53,567 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10655 transitions. Word has length 57 [2021-06-04 21:12:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:53,568 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10655 transitions. [2021-06-04 21:12:53,568 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) [2021-06-04 21:12:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10655 transitions. [2021-06-04 21:12:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:53,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:53,571 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] [2021-06-04 21:12:53,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-04 21:12:53,772 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:53,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-06-04 21:12:53,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:53,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414466885] [2021-06-04 21:12:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:53,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:53,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414466885] [2021-06-04 21:12:53,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414466885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:53,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628294672] [2021-06-04 21:12:53,846 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 [2021-06-04 21:12:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:12:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:54,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628294672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:54,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:54,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516490365] [2021-06-04 21:12:54,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:54,049 INFO L87 Difference]: Start difference. First operand 3878 states and 10655 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) [2021-06-04 21:12:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:54,225 INFO L93 Difference]: Finished difference Result 5289 states and 13896 transitions. [2021-06-04 21:12:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:12:54,226 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 [2021-06-04 21:12:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:54,231 INFO L225 Difference]: With dead ends: 5289 [2021-06-04 21:12:54,231 INFO L226 Difference]: Without dead ends: 5137 [2021-06-04 21:12:54,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:12:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5137 states. [2021-06-04 21:12:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5137 to 3903. [2021-06-04 21:12:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-06-04 21:12:54,278 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-06-04 21:12:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:54,278 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-06-04 21:12:54,278 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) [2021-06-04 21:12:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-06-04 21:12:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:54,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:54,281 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] [2021-06-04 21:12:54,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-04 21:12:54,482 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-06-04 21:12:54,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:54,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285628165] [2021-06-04 21:12:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:54,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:54,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285628165] [2021-06-04 21:12:54,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285628165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:54,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398421511] [2021-06-04 21:12:54,556 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 [2021-06-04 21:12:54,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:12:54,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:54,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398421511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:54,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:54,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81757880] [2021-06-04 21:12:54,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:54,758 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 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) [2021-06-04 21:12:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:55,039 INFO L93 Difference]: Finished difference Result 5505 states and 14328 transitions. [2021-06-04 21:12:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:12:55,040 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 [2021-06-04 21:12:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:55,047 INFO L225 Difference]: With dead ends: 5505 [2021-06-04 21:12:55,047 INFO L226 Difference]: Without dead ends: 5353 [2021-06-04 21:12:55,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:12:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-04 21:12:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3903. [2021-06-04 21:12:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-06-04 21:12:55,133 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-06-04 21:12:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:55,133 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-06-04 21:12:55,133 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) [2021-06-04 21:12:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-06-04 21:12:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:55,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:55,137 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] [2021-06-04 21:12:55,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:12:55,337 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-06-04 21:12:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:55,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285972233] [2021-06-04 21:12:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:55,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:55,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285972233] [2021-06-04 21:12:55,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285972233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70092167] [2021-06-04 21:12:55,409 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 [2021-06-04 21:12:55,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:12:55,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70092167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:12:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-04 21:12:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249376107] [2021-06-04 21:12:55,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:12:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:12:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:12:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:12:55,627 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 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) [2021-06-04 21:12:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:12:55,817 INFO L93 Difference]: Finished difference Result 5274 states and 13871 transitions. [2021-06-04 21:12:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:12:55,817 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 [2021-06-04 21:12:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:12:55,822 INFO L225 Difference]: With dead ends: 5274 [2021-06-04 21:12:55,823 INFO L226 Difference]: Without dead ends: 5122 [2021-06-04 21:12:55,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:12:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-06-04 21:12:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 3878. [2021-06-04 21:12:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7482589631158114) internal successors, (10655), 3877 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:12:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10655 transitions. [2021-06-04 21:12:55,864 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10655 transitions. Word has length 57 [2021-06-04 21:12:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:12:55,864 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10655 transitions. [2021-06-04 21:12:55,864 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) [2021-06-04 21:12:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10655 transitions. [2021-06-04 21:12:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-04 21:12:55,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:12:55,867 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] [2021-06-04 21:12:56,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-04 21:12:56,068 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:12:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:12:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-06-04 21:12:56,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:12:56,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271102347] [2021-06-04 21:12:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:12:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:12:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:12:56,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:12:56,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271102347] [2021-06-04 21:12:56,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271102347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:12:56,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873558572] [2021-06-04 21:12:56,144 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 [2021-06-04 21:12:56,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:12:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:12:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:12:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:12:59,782 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 3306 DAG size of output: 3299 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown