/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 15:22:33,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 15:22:33,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 15:22:33,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 15:22:33,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 15:22:33,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 15:22:33,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 15:22:33,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 15:22:33,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 15:22:33,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 15:22:33,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 15:22:33,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 15:22:33,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 15:22:33,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 15:22:33,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 15:22:33,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 15:22:33,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 15:22:33,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 15:22:33,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 15:22:33,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 15:22:33,917 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 [2021-05-21 15:22:33,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 15:22:33,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 15:22:33,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 15:22:33,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 15:22:33,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 15:22:33,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 15:22:33,978 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 15:22:33,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 15:22:33,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 15:22:33,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:22:33,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 15:22:33,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 15:22:33,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 15:22:33,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 15:22:33,981 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 15:22:33,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 15:22:33,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 15:22:34,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 15:22:34,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 15:22:34,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 15:22:34,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 15:22:34,428 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 15:22:34,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-05-21 15:22:34,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887bc9245/2a0b603a6eb243f09a16326607c47ded/FLAGe4bb67317 [2021-05-21 15:22:34,925 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 15:22:34,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-05-21 15:22:34,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887bc9245/2a0b603a6eb243f09a16326607c47ded/FLAGe4bb67317 [2021-05-21 15:22:35,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887bc9245/2a0b603a6eb243f09a16326607c47ded [2021-05-21 15:22:35,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 15:22:35,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 15:22:35,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 15:22:35,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 15:22:35,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 15:22:35,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a58f84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35, skipping insertion in model container [2021-05-21 15:22:35,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 15:22:35,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 15:22:35,543 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i[30929,30942] [2021-05-21 15:22:35,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:22:35,549 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 15:22:35,596 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i[30929,30942] [2021-05-21 15:22:35,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:22:35,644 INFO L208 MainTranslator]: Completed translation [2021-05-21 15:22:35,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35 WrapperNode [2021-05-21 15:22:35,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 15:22:35,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 15:22:35,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 15:22:35,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 15:22:35,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 15:22:35,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 15:22:35,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 15:22:35,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 15:22:35,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 15:22:35,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 15:22:35,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 15:22:35,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 15:22:35,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:22:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 15:22:35,752 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 15:22:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 15:22:35,753 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 15:22:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 15:22:35,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 15:22:35,754 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 15:22:35,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 15:22:35,985 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 15:22:35,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:22:35 BoogieIcfgContainer [2021-05-21 15:22:35,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 15:22:35,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 15:22:35,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 15:22:35,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 15:22:35,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 03:22:35" (1/3) ... [2021-05-21 15:22:35,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd243e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:22:35, skipping insertion in model container [2021-05-21 15:22:35,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (2/3) ... [2021-05-21 15:22:35,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd243e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:22:35, skipping insertion in model container [2021-05-21 15:22:35,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:22:35" (3/3) ... [2021-05-21 15:22:35,991 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-05-21 15:22:35,994 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 15:22:35,995 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 15:22:35,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 15:22:35,995 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 15:22:36,010 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,011 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,014 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,015 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,016 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,017 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,018 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,018 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,018 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,019 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,019 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,019 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,019 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,023 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,023 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,023 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,024 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 15:22:36,037 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 15:22:36,049 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 15:22:36,049 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 15:22:36,049 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 15:22:36,049 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 15:22:36,049 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 15:22:36,049 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 15:22:36,049 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 15:22:36,049 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 15:22:36,061 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 15:22:36,138 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 15:22:36,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:36,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:36,160 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-05-21 15:22:36,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:36,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893401304] [2021-05-21 15:22:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:36,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:36,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893401304] [2021-05-21 15:22:36,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893401304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:36,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:36,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:22:36,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894160805] [2021-05-21 15:22:36,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:22:36,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:22:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:22:36,435 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:36,537 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-05-21 15:22:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:22:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 15:22:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:36,553 INFO L225 Difference]: With dead ends: 3996 [2021-05-21 15:22:36,553 INFO L226 Difference]: Without dead ends: 1425 [2021-05-21 15:22:36,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:22:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-05-21 15:22:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-05-21 15:22:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-05-21 15:22:36,621 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-05-21 15:22:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:36,621 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-05-21 15:22:36,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-05-21 15:22:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:36,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:36,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:36,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 15:22:36,627 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-05-21 15:22:36,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:36,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488981778] [2021-05-21 15:22:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:36,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:36,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488981778] [2021-05-21 15:22:36,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488981778] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:36,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:36,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:36,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990446369] [2021-05-21 15:22:36,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:36,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:36,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:36,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:36,760 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:36,846 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-05-21 15:22:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:22:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 15:22:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:36,855 INFO L225 Difference]: With dead ends: 2025 [2021-05-21 15:22:36,855 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 15:22:36,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:22:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 15:22:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-05-21 15:22:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-05-21 15:22:36,888 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-05-21 15:22:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:36,888 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-05-21 15:22:36,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-05-21 15:22:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:36,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:36,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:36,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 15:22:36,895 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-05-21 15:22:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:36,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896064188] [2021-05-21 15:22:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:36,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:36,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896064188] [2021-05-21 15:22:36,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896064188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:36,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:36,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789241906] [2021-05-21 15:22:36,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:36,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:36,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:36,983 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,078 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-05-21 15:22:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:22:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 15:22:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,084 INFO L225 Difference]: With dead ends: 2062 [2021-05-21 15:22:37,084 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 15:22:37,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:22:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 15:22:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-05-21 15:22:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-05-21 15:22:37,109 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-05-21 15:22:37,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,109 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-05-21 15:22:37,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-05-21 15:22:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:37,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:37,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 15:22:37,112 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-05-21 15:22:37,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304174296] [2021-05-21 15:22:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304174296] [2021-05-21 15:22:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304174296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880190949] [2021-05-21 15:22:37,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:37,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:37,204 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,296 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-05-21 15:22:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 15:22:37,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 15:22:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,307 INFO L225 Difference]: With dead ends: 2318 [2021-05-21 15:22:37,307 INFO L226 Difference]: Without dead ends: 1987 [2021-05-21 15:22:37,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:22:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-05-21 15:22:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-05-21 15:22:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-05-21 15:22:37,333 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-05-21 15:22:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,334 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-05-21 15:22:37,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-05-21 15:22:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:37,336 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,336 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:37,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 15:22:37,336 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-05-21 15:22:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318462369] [2021-05-21 15:22:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318462369] [2021-05-21 15:22:37,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318462369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150794419] [2021-05-21 15:22:37,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:37,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:37,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:37,418 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,483 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-05-21 15:22:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:22:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 15:22:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,490 INFO L225 Difference]: With dead ends: 2203 [2021-05-21 15:22:37,490 INFO L226 Difference]: Without dead ends: 2051 [2021-05-21 15:22:37,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:22:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-05-21 15:22:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-05-21 15:22:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-05-21 15:22:37,519 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-05-21 15:22:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,519 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-05-21 15:22:37,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-05-21 15:22:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:37,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:37,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 15:22:37,521 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-05-21 15:22:37,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777990785] [2021-05-21 15:22:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777990785] [2021-05-21 15:22:37,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777990785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:37,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125029070] [2021-05-21 15:22:37,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:37,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:37,607 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,744 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-05-21 15:22:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:37,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 15:22:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,753 INFO L225 Difference]: With dead ends: 2907 [2021-05-21 15:22:37,753 INFO L226 Difference]: Without dead ends: 2461 [2021-05-21 15:22:37,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-05-21 15:22:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-05-21 15:22:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-05-21 15:22:37,804 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-05-21 15:22:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,804 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-05-21 15:22:37,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-05-21 15:22:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:37,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,806 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:37,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 15:22:37,806 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-05-21 15:22:37,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187894554] [2021-05-21 15:22:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187894554] [2021-05-21 15:22:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187894554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:37,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812066363] [2021-05-21 15:22:37,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:37,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:37,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:37,862 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,983 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-05-21 15:22:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:22:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 15:22:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,992 INFO L225 Difference]: With dead ends: 3149 [2021-05-21 15:22:37,992 INFO L226 Difference]: Without dead ends: 2834 [2021-05-21 15:22:37,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-05-21 15:22:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-05-21 15:22:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-05-21 15:22:38,039 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-05-21 15:22:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,039 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-05-21 15:22:38,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-05-21 15:22:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:38,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:38,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 15:22:38,042 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-05-21 15:22:38,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946909725] [2021-05-21 15:22:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946909725] [2021-05-21 15:22:38,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946909725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:38,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532757283] [2021-05-21 15:22:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532757283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:38,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500479499] [2021-05-21 15:22:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:38,478 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,629 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-05-21 15:22:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:22:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,638 INFO L225 Difference]: With dead ends: 3261 [2021-05-21 15:22:38,638 INFO L226 Difference]: Without dead ends: 2781 [2021-05-21 15:22:38,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-05-21 15:22:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-05-21 15:22:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-05-21 15:22:38,675 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-05-21 15:22:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,675 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-05-21 15:22:38,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-05-21 15:22:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:38,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:38,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 15:22:38,893 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-05-21 15:22:38,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435783075] [2021-05-21 15:22:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435783075] [2021-05-21 15:22:38,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435783075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:38,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913222991] [2021-05-21 15:22:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:39,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913222991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:39,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:39,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349440134] [2021-05-21 15:22:39,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:39,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:39,231 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:39,358 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-05-21 15:22:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:22:39,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:39,364 INFO L225 Difference]: With dead ends: 3013 [2021-05-21 15:22:39,364 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 15:22:39,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:22:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 15:22:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-05-21 15:22:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-05-21 15:22:39,398 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-05-21 15:22:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:39,398 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-05-21 15:22:39,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-05-21 15:22:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:39,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:39,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:39,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:39,618 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-05-21 15:22:39,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:39,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340093734] [2021-05-21 15:22:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340093734] [2021-05-21 15:22:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340093734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406773860] [2021-05-21 15:22:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:39,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 15:22:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406773860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:39,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987675220] [2021-05-21 15:22:39,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:39,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:39,887 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:40,054 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-05-21 15:22:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:40,059 INFO L225 Difference]: With dead ends: 3525 [2021-05-21 15:22:40,059 INFO L226 Difference]: Without dead ends: 3045 [2021-05-21 15:22:40,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-05-21 15:22:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-05-21 15:22:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-05-21 15:22:40,091 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-05-21 15:22:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:40,091 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-05-21 15:22:40,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-05-21 15:22:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:40,093 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:40,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:40,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 15:22:40,311 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-05-21 15:22:40,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:40,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81920766] [2021-05-21 15:22:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:40,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81920766] [2021-05-21 15:22:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81920766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187213433] [2021-05-21 15:22:40,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:40,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:40,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187213433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:40,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:40,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:40,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744427798] [2021-05-21 15:22:40,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:40,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:40,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:40,546 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:40,847 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-05-21 15:22:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:22:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:40,858 INFO L225 Difference]: With dead ends: 4570 [2021-05-21 15:22:40,858 INFO L226 Difference]: Without dead ends: 3833 [2021-05-21 15:22:40,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-05-21 15:22:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-05-21 15:22:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-05-21 15:22:40,897 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-05-21 15:22:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:40,897 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-05-21 15:22:40,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-05-21 15:22:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:40,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:40,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:41,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:41,115 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-05-21 15:22:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:41,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31012296] [2021-05-21 15:22:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:41,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31012296] [2021-05-21 15:22:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31012296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886194517] [2021-05-21 15:22:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:41,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:41,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886194517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:41,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059160621] [2021-05-21 15:22:41,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:41,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:41,371 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:41,597 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-05-21 15:22:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:22:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:41,603 INFO L225 Difference]: With dead ends: 4350 [2021-05-21 15:22:41,604 INFO L226 Difference]: Without dead ends: 3958 [2021-05-21 15:22:41,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-05-21 15:22:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-05-21 15:22:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-05-21 15:22:41,643 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-05-21 15:22:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:41,644 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-05-21 15:22:41,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-05-21 15:22:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:41,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:41,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:41,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:41,861 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:41,861 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-05-21 15:22:41,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:41,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441908679] [2021-05-21 15:22:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441908679] [2021-05-21 15:22:41,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441908679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530830907] [2021-05-21 15:22:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:41,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 15:22:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:41,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:42,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530830907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:42,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:42,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:42,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833329180] [2021-05-21 15:22:42,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:42,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:42,127 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:42,662 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-05-21 15:22:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:22:42,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 15:22:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:42,670 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 15:22:42,670 INFO L226 Difference]: Without dead ends: 4898 [2021-05-21 15:22:42,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:22:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-05-21 15:22:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-05-21 15:22:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-05-21 15:22:42,715 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-05-21 15:22:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:42,715 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-05-21 15:22:42,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-05-21 15:22:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:42,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:42,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:42,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:42,934 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-05-21 15:22:42,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:42,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056829974] [2021-05-21 15:22:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:42,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:42,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056829974] [2021-05-21 15:22:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056829974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:42,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083983343] [2021-05-21 15:22:42,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:43,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083983343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:43,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:43,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427326565] [2021-05-21 15:22:43,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:43,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:43,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:43,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:43,178 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:43,391 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-05-21 15:22:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:22:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:43,398 INFO L225 Difference]: With dead ends: 4391 [2021-05-21 15:22:43,398 INFO L226 Difference]: Without dead ends: 3999 [2021-05-21 15:22:43,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-05-21 15:22:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-05-21 15:22:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-05-21 15:22:43,462 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-05-21 15:22:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:43,462 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-05-21 15:22:43,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-05-21 15:22:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:43,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:43,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:43,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 15:22:43,681 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-05-21 15:22:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:43,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193788982] [2021-05-21 15:22:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:43,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193788982] [2021-05-21 15:22:43,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193788982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721241738] [2021-05-21 15:22:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721241738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:43,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:43,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653254876] [2021-05-21 15:22:43,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:43,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:43,940 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:44,134 INFO L93 Difference]: Finished difference Result 4167 states and 10754 transitions. [2021-05-21 15:22:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:22:44,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:44,139 INFO L225 Difference]: With dead ends: 4167 [2021-05-21 15:22:44,140 INFO L226 Difference]: Without dead ends: 4015 [2021-05-21 15:22:44,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:22:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-05-21 15:22:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 2982. [2021-05-21 15:22:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-05-21 15:22:44,177 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-05-21 15:22:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:44,177 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-05-21 15:22:44,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-05-21 15:22:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:44,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:44,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:44,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 15:22:44,397 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:44,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-05-21 15:22:44,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:44,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887231421] [2021-05-21 15:22:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:44,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887231421] [2021-05-21 15:22:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887231421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437460887] [2021-05-21 15:22:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:44,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:44,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:44,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437460887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:44,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:44,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:44,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536007240] [2021-05-21 15:22:44,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:44,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:44,668 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:44,868 INFO L93 Difference]: Finished difference Result 4007 states and 10434 transitions. [2021-05-21 15:22:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:44,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:44,872 INFO L225 Difference]: With dead ends: 4007 [2021-05-21 15:22:44,872 INFO L226 Difference]: Without dead ends: 3855 [2021-05-21 15:22:44,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-05-21 15:22:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 2981. [2021-05-21 15:22:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-05-21 15:22:44,911 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-05-21 15:22:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:44,911 INFO L482 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-05-21 15:22:44,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-05-21 15:22:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:44,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:44,918 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:45,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 15:22:45,134 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-05-21 15:22:45,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:45,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393282470] [2021-05-21 15:22:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393282470] [2021-05-21 15:22:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393282470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9965291] [2021-05-21 15:22:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:45,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9965291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:45,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:45,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351658324] [2021-05-21 15:22:45,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:45,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:45,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:45,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:45,404 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:45,624 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-05-21 15:22:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:22:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:45,629 INFO L225 Difference]: With dead ends: 4796 [2021-05-21 15:22:45,629 INFO L226 Difference]: Without dead ends: 4404 [2021-05-21 15:22:45,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:22:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-05-21 15:22:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-05-21 15:22:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-05-21 15:22:45,669 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-05-21 15:22:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:45,669 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-05-21 15:22:45,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-05-21 15:22:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:45,672 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:45,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:45,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:45,892 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-05-21 15:22:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:45,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182766971] [2021-05-21 15:22:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182766971] [2021-05-21 15:22:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182766971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513184145] [2021-05-21 15:22:45,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:46,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:46,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513184145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:46,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:46,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227028734] [2021-05-21 15:22:46,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:46,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:46,150 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:46,470 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-05-21 15:22:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:22:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:46,475 INFO L225 Difference]: With dead ends: 5543 [2021-05-21 15:22:46,475 INFO L226 Difference]: Without dead ends: 5063 [2021-05-21 15:22:46,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:22:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-05-21 15:22:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-05-21 15:22:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-05-21 15:22:46,524 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-05-21 15:22:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:46,524 INFO L482 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-05-21 15:22:46,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-05-21 15:22:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:46,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:46,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:46,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 15:22:46,741 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:46,741 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-05-21 15:22:46,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:46,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496890993] [2021-05-21 15:22:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:46,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496890993] [2021-05-21 15:22:46,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496890993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804393468] [2021-05-21 15:22:46,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:46,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804393468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:46,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:46,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150257105] [2021-05-21 15:22:46,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:46,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:46,976 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:47,452 INFO L93 Difference]: Finished difference Result 6220 states and 16674 transitions. [2021-05-21 15:22:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:22:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:47,457 INFO L225 Difference]: With dead ends: 6220 [2021-05-21 15:22:47,458 INFO L226 Difference]: Without dead ends: 5544 [2021-05-21 15:22:47,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:22:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-05-21 15:22:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 3235. [2021-05-21 15:22:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-05-21 15:22:47,502 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-05-21 15:22:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:47,502 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-05-21 15:22:47,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-05-21 15:22:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:47,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:47,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:47,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:47,713 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-05-21 15:22:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:47,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892607091] [2021-05-21 15:22:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892607091] [2021-05-21 15:22:47,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892607091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204147887] [2021-05-21 15:22:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:47,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204147887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:47,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:47,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459001846] [2021-05-21 15:22:47,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:47,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:47,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:47,959 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:48,253 INFO L93 Difference]: Finished difference Result 5134 states and 13421 transitions. [2021-05-21 15:22:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:22:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:48,258 INFO L225 Difference]: With dead ends: 5134 [2021-05-21 15:22:48,258 INFO L226 Difference]: Without dead ends: 4982 [2021-05-21 15:22:48,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:22:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-05-21 15:22:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3275. [2021-05-21 15:22:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 2.775809407452657) internal successors, (9088), 3274 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-05-21 15:22:48,339 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-05-21 15:22:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:48,339 INFO L482 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-05-21 15:22:48,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-05-21 15:22:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:48,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:48,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:48,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 15:22:48,561 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-05-21 15:22:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:48,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801143889] [2021-05-21 15:22:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801143889] [2021-05-21 15:22:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801143889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473952564] [2021-05-21 15:22:48,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:48,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473952564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:48,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837623843] [2021-05-21 15:22:48,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:48,833 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:49,125 INFO L93 Difference]: Finished difference Result 5358 states and 14344 transitions. [2021-05-21 15:22:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:22:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:49,131 INFO L225 Difference]: With dead ends: 5358 [2021-05-21 15:22:49,131 INFO L226 Difference]: Without dead ends: 5206 [2021-05-21 15:22:49,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:22:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-05-21 15:22:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 3363. [2021-05-21 15:22:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-05-21 15:22:49,172 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-05-21 15:22:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:49,172 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-05-21 15:22:49,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-05-21 15:22:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:49,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:49,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:49,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:49,391 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-05-21 15:22:49,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:49,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441180699] [2021-05-21 15:22:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:49,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:49,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441180699] [2021-05-21 15:22:49,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441180699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:49,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931729160] [2021-05-21 15:22:49,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:49,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:22:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931729160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:49,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:49,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565118966] [2021-05-21 15:22:49,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:49,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:49,633 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:50,141 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-05-21 15:22:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:22:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:50,147 INFO L225 Difference]: With dead ends: 6683 [2021-05-21 15:22:50,147 INFO L226 Difference]: Without dead ends: 6253 [2021-05-21 15:22:50,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:22:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-05-21 15:22:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-05-21 15:22:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-05-21 15:22:50,191 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-05-21 15:22:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:50,191 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-05-21 15:22:50,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-05-21 15:22:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:50,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:50,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:50,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 15:22:50,397 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-05-21 15:22:50,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:50,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830880632] [2021-05-21 15:22:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:50,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:50,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830880632] [2021-05-21 15:22:50,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830880632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:50,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105197555] [2021-05-21 15:22:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:50,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:22:50,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:50,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105197555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:50,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:50,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94894863] [2021-05-21 15:22:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:50,665 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:50,796 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-05-21 15:22:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 15:22:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:50,801 INFO L225 Difference]: With dead ends: 4779 [2021-05-21 15:22:50,801 INFO L226 Difference]: Without dead ends: 4627 [2021-05-21 15:22:50,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-05-21 15:22:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-05-21 15:22:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 15:22:50,842 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 15:22:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:50,842 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 15:22:50,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 15:22:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:50,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:50,846 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:51,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 15:22:51,062 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-05-21 15:22:51,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:51,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029860177] [2021-05-21 15:22:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:51,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029860177] [2021-05-21 15:22:51,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029860177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808596889] [2021-05-21 15:22:51,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:51,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:22:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808596889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:51,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:51,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601154477] [2021-05-21 15:22:51,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:51,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:51,381 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:51,588 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-05-21 15:22:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:51,593 INFO L225 Difference]: With dead ends: 4955 [2021-05-21 15:22:51,593 INFO L226 Difference]: Without dead ends: 4803 [2021-05-21 15:22:51,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:22:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-05-21 15:22:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-05-21 15:22:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-05-21 15:22:51,632 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-05-21 15:22:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:51,632 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-05-21 15:22:51,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-05-21 15:22:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:51,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:51,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:51,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 15:22:51,840 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-05-21 15:22:51,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:51,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311278223] [2021-05-21 15:22:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:51,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311278223] [2021-05-21 15:22:51,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311278223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465027279] [2021-05-21 15:22:51,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:51,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 15:22:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465027279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:52,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781056531] [2021-05-21 15:22:52,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:52,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:52,120 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:52,369 INFO L93 Difference]: Finished difference Result 5339 states and 13949 transitions. [2021-05-21 15:22:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:22:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:52,375 INFO L225 Difference]: With dead ends: 5339 [2021-05-21 15:22:52,375 INFO L226 Difference]: Without dead ends: 4947 [2021-05-21 15:22:52,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:22:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-05-21 15:22:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3582. [2021-05-21 15:22:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 2.7402960067020383) internal successors, (9813), 3581 states have internal predecessors, (9813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 9813 transitions. [2021-05-21 15:22:52,427 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 9813 transitions. Word has length 57 [2021-05-21 15:22:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:52,427 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 9813 transitions. [2021-05-21 15:22:52,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 9813 transitions. [2021-05-21 15:22:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:52,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:52,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:52,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 15:22:52,645 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-05-21 15:22:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:52,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448410933] [2021-05-21 15:22:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:52,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448410933] [2021-05-21 15:22:52,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448410933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535755180] [2021-05-21 15:22:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:52,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535755180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:52,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393515821] [2021-05-21 15:22:52,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:52,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:52,964 INFO L87 Difference]: Start difference. First operand 3582 states and 9813 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:53,159 INFO L93 Difference]: Finished difference Result 4949 states and 13043 transitions. [2021-05-21 15:22:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:53,164 INFO L225 Difference]: With dead ends: 4949 [2021-05-21 15:22:53,164 INFO L226 Difference]: Without dead ends: 4797 [2021-05-21 15:22:53,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-05-21 15:22:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3547. [2021-05-21 15:22:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.745628877608573) internal successors, (9736), 3546 states have internal predecessors, (9736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9736 transitions. [2021-05-21 15:22:53,205 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9736 transitions. Word has length 57 [2021-05-21 15:22:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:53,205 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9736 transitions. [2021-05-21 15:22:53,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9736 transitions. [2021-05-21 15:22:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:53,208 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:53,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:53,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:53,424 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-05-21 15:22:53,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:53,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769858138] [2021-05-21 15:22:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:53,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:53,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769858138] [2021-05-21 15:22:53,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769858138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:53,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982446002] [2021-05-21 15:22:53,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:53,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:53,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:53,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982446002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:53,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:53,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:53,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126525702] [2021-05-21 15:22:53,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:53,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:53,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:53,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:53,693 INFO L87 Difference]: Start difference. First operand 3547 states and 9736 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:53,947 INFO L93 Difference]: Finished difference Result 5131 states and 13405 transitions. [2021-05-21 15:22:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:22:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:53,969 INFO L225 Difference]: With dead ends: 5131 [2021-05-21 15:22:53,970 INFO L226 Difference]: Without dead ends: 4979 [2021-05-21 15:22:53,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-05-21 15:22:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3652. [2021-05-21 15:22:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 2.7299370035606683) internal successors, (9967), 3651 states have internal predecessors, (9967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 9967 transitions. [2021-05-21 15:22:54,008 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 9967 transitions. Word has length 57 [2021-05-21 15:22:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:54,008 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 9967 transitions. [2021-05-21 15:22:54,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 9967 transitions. [2021-05-21 15:22:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:54,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:54,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:54,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 15:22:54,228 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:54,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-05-21 15:22:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:54,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545664314] [2021-05-21 15:22:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:54,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545664314] [2021-05-21 15:22:54,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545664314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580488477] [2021-05-21 15:22:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:54,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:54,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:54,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:54,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580488477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:54,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:54,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:54,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479861115] [2021-05-21 15:22:54,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:54,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:54,503 INFO L87 Difference]: Start difference. First operand 3652 states and 9967 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:54,815 INFO L93 Difference]: Finished difference Result 5235 states and 13613 transitions. [2021-05-21 15:22:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:22:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:54,821 INFO L225 Difference]: With dead ends: 5235 [2021-05-21 15:22:54,821 INFO L226 Difference]: Without dead ends: 5083 [2021-05-21 15:22:54,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:22:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-05-21 15:22:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3636. [2021-05-21 15:22:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.730123796423659) internal successors, (9924), 3635 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 9924 transitions. [2021-05-21 15:22:54,859 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 9924 transitions. Word has length 57 [2021-05-21 15:22:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:54,859 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 9924 transitions. [2021-05-21 15:22:54,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 9924 transitions. [2021-05-21 15:22:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:54,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:54,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:55,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 15:22:55,073 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-05-21 15:22:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:55,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377449366] [2021-05-21 15:22:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:55,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377449366] [2021-05-21 15:22:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377449366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229139526] [2021-05-21 15:22:55,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:55,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:55,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:55,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229139526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:55,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:55,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:55,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538537253] [2021-05-21 15:22:55,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:55,400 INFO L87 Difference]: Start difference. First operand 3636 states and 9924 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:55,740 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-05-21 15:22:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:22:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:55,745 INFO L225 Difference]: With dead ends: 5219 [2021-05-21 15:22:55,745 INFO L226 Difference]: Without dead ends: 5067 [2021-05-21 15:22:55,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:22:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-05-21 15:22:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3581. [2021-05-21 15:22:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 2.7391061452513967) internal successors, (9806), 3580 states have internal predecessors, (9806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 9806 transitions. [2021-05-21 15:22:55,789 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 9806 transitions. Word has length 57 [2021-05-21 15:22:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:55,789 INFO L482 AbstractCegarLoop]: Abstraction has 3581 states and 9806 transitions. [2021-05-21 15:22:55,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 9806 transitions. [2021-05-21 15:22:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:55,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:55,793 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:55,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:55,993 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-05-21 15:22:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:55,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428135798] [2021-05-21 15:22:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:56,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428135798] [2021-05-21 15:22:56,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428135798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878310567] [2021-05-21 15:22:56,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:56,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878310567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:56,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:56,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198955036] [2021-05-21 15:22:56,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:56,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:56,233 INFO L87 Difference]: Start difference. First operand 3581 states and 9806 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:56,392 INFO L93 Difference]: Finished difference Result 5043 states and 13229 transitions. [2021-05-21 15:22:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:22:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:56,397 INFO L225 Difference]: With dead ends: 5043 [2021-05-21 15:22:56,397 INFO L226 Difference]: Without dead ends: 4891 [2021-05-21 15:22:56,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-05-21 15:22:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-05-21 15:22:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-05-21 15:22:56,433 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-05-21 15:22:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:56,433 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-05-21 15:22:56,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-05-21 15:22:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:56,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:56,436 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:56,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 15:22:56,637 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-05-21 15:22:56,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:56,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711364024] [2021-05-21 15:22:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:56,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711364024] [2021-05-21 15:22:56,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711364024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978596038] [2021-05-21 15:22:56,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:56,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:56,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:56,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978596038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:56,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468680259] [2021-05-21 15:22:56,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:56,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:56,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:56,889 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:57,112 INFO L93 Difference]: Finished difference Result 5339 states and 13821 transitions. [2021-05-21 15:22:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:57,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:57,117 INFO L225 Difference]: With dead ends: 5339 [2021-05-21 15:22:57,117 INFO L226 Difference]: Without dead ends: 5187 [2021-05-21 15:22:57,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:22:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-05-21 15:22:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3606. [2021-05-21 15:22:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.735367545076283) internal successors, (9861), 3605 states have internal predecessors, (9861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9861 transitions. [2021-05-21 15:22:57,153 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9861 transitions. Word has length 57 [2021-05-21 15:22:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:57,154 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9861 transitions. [2021-05-21 15:22:57,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9861 transitions. [2021-05-21 15:22:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:57,159 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:57,159 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:57,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:57,373 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-05-21 15:22:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:57,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509428] [2021-05-21 15:22:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:57,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509428] [2021-05-21 15:22:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588594868] [2021-05-21 15:22:57,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:57,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:22:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:57,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588594868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:57,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:57,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:57,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777494822] [2021-05-21 15:22:57,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:57,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:57,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:57,653 INFO L87 Difference]: Start difference. First operand 3606 states and 9861 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:57,951 INFO L93 Difference]: Finished difference Result 5859 states and 14989 transitions. [2021-05-21 15:22:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:22:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:57,956 INFO L225 Difference]: With dead ends: 5859 [2021-05-21 15:22:57,956 INFO L226 Difference]: Without dead ends: 5467 [2021-05-21 15:22:57,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:22:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-05-21 15:22:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3631. [2021-05-21 15:22:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.73168044077135) internal successors, (9916), 3630 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9916 transitions. [2021-05-21 15:22:57,993 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9916 transitions. Word has length 57 [2021-05-21 15:22:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:57,993 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9916 transitions. [2021-05-21 15:22:57,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9916 transitions. [2021-05-21 15:22:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:57,996 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:57,996 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:58,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 15:22:58,211 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-05-21 15:22:58,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:58,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091911238] [2021-05-21 15:22:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:58,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091911238] [2021-05-21 15:22:58,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091911238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383793855] [2021-05-21 15:22:58,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:58,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:22:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383793855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:58,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:58,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197678447] [2021-05-21 15:22:58,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:58,477 INFO L87 Difference]: Start difference. First operand 3631 states and 9916 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:58,729 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-05-21 15:22:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:22:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:58,733 INFO L225 Difference]: With dead ends: 5219 [2021-05-21 15:22:58,733 INFO L226 Difference]: Without dead ends: 5067 [2021-05-21 15:22:58,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:22:58,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-05-21 15:22:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3556. [2021-05-21 15:22:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-05-21 15:22:58,769 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-05-21 15:22:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:58,769 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-05-21 15:22:58,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-05-21 15:22:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:58,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:58,771 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:58,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 15:22:58,986 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-05-21 15:22:58,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:58,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829922042] [2021-05-21 15:22:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829922042] [2021-05-21 15:22:59,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829922042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882500847] [2021-05-21 15:22:59,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:59,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:22:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882500847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:59,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230186138] [2021-05-21 15:22:59,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:59,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:59,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:59,230 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:59,397 INFO L93 Difference]: Finished difference Result 5128 states and 13414 transitions. [2021-05-21 15:22:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:22:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:59,401 INFO L225 Difference]: With dead ends: 5128 [2021-05-21 15:22:59,401 INFO L226 Difference]: Without dead ends: 4976 [2021-05-21 15:22:59,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:22:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-05-21 15:22:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3531. [2021-05-21 15:22:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-05-21 15:22:59,435 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-05-21 15:22:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:59,435 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-05-21 15:22:59,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-05-21 15:22:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:59,437 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:59,437 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:59,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 15:22:59,638 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-05-21 15:22:59,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:59,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825684309] [2021-05-21 15:22:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825684309] [2021-05-21 15:22:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825684309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750287932] [2021-05-21 15:22:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:59,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:59,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:59,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750287932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:59,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014296343] [2021-05-21 15:22:59,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:59,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:59,882 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:00,101 INFO L93 Difference]: Finished difference Result 5384 states and 13926 transitions. [2021-05-21 15:23:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:23:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:00,106 INFO L225 Difference]: With dead ends: 5384 [2021-05-21 15:23:00,106 INFO L226 Difference]: Without dead ends: 5232 [2021-05-21 15:23:00,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:23:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-05-21 15:23:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 3556. [2021-05-21 15:23:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-05-21 15:23:00,154 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-05-21 15:23:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:00,154 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-05-21 15:23:00,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-05-21 15:23:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:00,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:00,157 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:23:00,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:00,357 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-05-21 15:23:00,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:00,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853517536] [2021-05-21 15:23:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853517536] [2021-05-21 15:23:00,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853517536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396635710] [2021-05-21 15:23:00,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:00,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:23:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396635710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:00,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:00,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796161457] [2021-05-21 15:23:00,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:00,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:00,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:00,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:00,592 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:00,757 INFO L93 Difference]: Finished difference Result 5113 states and 13389 transitions. [2021-05-21 15:23:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:23:00,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:00,762 INFO L225 Difference]: With dead ends: 5113 [2021-05-21 15:23:00,762 INFO L226 Difference]: Without dead ends: 4961 [2021-05-21 15:23:00,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:23:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-05-21 15:23:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3531. [2021-05-21 15:23:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-05-21 15:23:00,800 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-05-21 15:23:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:00,800 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-05-21 15:23:00,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-05-21 15:23:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:00,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:00,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:23:01,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 15:23:01,003 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:01,004 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-05-21 15:23:01,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:01,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680529888] [2021-05-21 15:23:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:01,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680529888] [2021-05-21 15:23:01,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680529888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717275380] [2021-05-21 15:23:01,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:01,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:23:01,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:23:01,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717275380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:01,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840362728] [2021-05-21 15:23:01,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:01,561 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:02,082 INFO L93 Difference]: Finished difference Result 7762 states and 20463 transitions. [2021-05-21 15:23:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:23:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:02,089 INFO L225 Difference]: With dead ends: 7762 [2021-05-21 15:23:02,089 INFO L226 Difference]: Without dead ends: 7052 [2021-05-21 15:23:02,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:23:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2021-05-21 15:23:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 3809. [2021-05-21 15:23:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 2.7547268907563027) internal successors, (10490), 3808 states have internal predecessors, (10490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 10490 transitions. [2021-05-21 15:23:02,133 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 10490 transitions. Word has length 57 [2021-05-21 15:23:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:02,133 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 10490 transitions. [2021-05-21 15:23:02,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 10490 transitions. [2021-05-21 15:23:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:02,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:02,136 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:23:02,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:02,339 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash 613988712, now seen corresponding path program 13 times [2021-05-21 15:23:02,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:02,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197705072] [2021-05-21 15:23:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:02,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:02,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197705072] [2021-05-21 15:23:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197705072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:02,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808091340] [2021-05-21 15:23:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808091340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:02,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:02,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:02,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799702492] [2021-05-21 15:23:02,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:02,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:02,609 INFO L87 Difference]: Start difference. First operand 3809 states and 10490 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:02,851 INFO L93 Difference]: Finished difference Result 5498 states and 14449 transitions. [2021-05-21 15:23:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:23:02,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:02,857 INFO L225 Difference]: With dead ends: 5498 [2021-05-21 15:23:02,857 INFO L226 Difference]: Without dead ends: 5346 [2021-05-21 15:23:02,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:23:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-05-21 15:23:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 3884. [2021-05-21 15:23:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3883 states have (on average 2.7671903167653875) internal successors, (10745), 3883 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 10745 transitions. [2021-05-21 15:23:02,900 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 10745 transitions. Word has length 57 [2021-05-21 15:23:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:02,900 INFO L482 AbstractCegarLoop]: Abstraction has 3884 states and 10745 transitions. [2021-05-21 15:23:02,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 10745 transitions. [2021-05-21 15:23:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:02,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:02,904 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:23:03,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:03,105 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -48566186, now seen corresponding path program 14 times [2021-05-21 15:23:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:03,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396389751] [2021-05-21 15:23:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:03,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396389751] [2021-05-21 15:23:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396389751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37959902] [2021-05-21 15:23:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:23:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-21 15:37:17,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-21 15:37:17,836 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 15:37:17,838 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 15:37:17,839 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 15:37:17,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 03:37:17 BasicIcfg [2021-05-21 15:37:17,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 15:37:17,840 INFO L168 Benchmark]: Toolchain (without parser) took 882548.18 ms. Allocated memory was 352.3 MB in the beginning and 1.3 GB in the end (delta: 983.6 MB). Free memory was 314.2 MB in the beginning and 740.0 MB in the end (delta: -425.7 MB). Peak memory consumption was 834.7 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 332.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.85 ms. Allocated memory is still 352.3 MB. Free memory was 314.0 MB in the beginning and 315.0 MB in the end (delta: -984.9 kB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.34 ms. Allocated memory is still 352.3 MB. Free memory was 315.0 MB in the beginning and 312.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L168 Benchmark]: Boogie Preprocessor took 13.25 ms. Allocated memory is still 352.3 MB. Free memory was 312.9 MB in the beginning and 311.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L168 Benchmark]: RCFGBuilder took 301.91 ms. Allocated memory is still 352.3 MB. Free memory was 311.9 MB in the beginning and 288.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L168 Benchmark]: TraceAbstraction took 881851.77 ms. Allocated memory was 352.3 MB in the beginning and 1.3 GB in the end (delta: 983.6 MB). Free memory was 287.8 MB in the beginning and 740.0 MB in the end (delta: -452.2 MB). Peak memory consumption was 808.7 MB. Max. memory is 16.0 GB. [2021-05-21 15:37:17,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 332.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 314.85 ms. Allocated memory is still 352.3 MB. Free memory was 314.0 MB in the beginning and 315.0 MB in the end (delta: -984.9 kB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.34 ms. Allocated memory is still 352.3 MB. Free memory was 315.0 MB in the beginning and 312.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.25 ms. Allocated memory is still 352.3 MB. Free memory was 312.9 MB in the beginning and 311.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 301.91 ms. Allocated memory is still 352.3 MB. Free memory was 311.9 MB in the beginning and 288.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 881851.77 ms. Allocated memory was 352.3 MB in the beginning and 1.3 GB in the end (delta: 983.6 MB). Free memory was 287.8 MB in the beginning and 740.0 MB in the end (delta: -452.2 MB). Peak memory consumption was 808.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 881789.1ms, OverallIterations: 39, TraceHistogramMax: 4, EmptinessCheckTime: 131.0ms, AutomataDifference: 9173.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3553 SDtfs, 19238 SDslu, 28079 SDs, 0 SdLazy, 4777 SolverSat, 1269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2218.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2466 GetRequests, 1481 SyntacticMatches, 8 SemanticMatches, 977 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 8671.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3884occurred in iteration=38, InterpolantAutomatonStates: 821, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1555.6ms AutomataMinimizationTime, 38 MinimizatonAttempts, 51245 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 297.8ms SsaConstructionTime, 716.8ms SatisfiabilityAnalysisTime, 7300.5ms InterpolantComputationTime, 3593 NumberOfCodeBlocks, 3593 NumberOfCodeBlocksAsserted, 112 NumberOfCheckSat, 3524 ConstructedInterpolants, 0 QuantifiedInterpolants, 26046 SizeOfPredicates, 62 NumberOfNonLiveVariables, 4172 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 69 InterpolantComputations, 7 PerfectInterpolantSequences, 0/648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown